TISP61089B *RoHS COMPLIANT DUAL FORWARD-CONDUCTING P-GATE THYRISTORS PROGRAMMABLE OVERVOLTAGE PROTECTORS TISP61089B High Voltage Ringing SLIC Protector Dual Voltage-Programmable Protectors D Package (Top View) - Supports Battery Voltages Down to -155 V - Low 5 mA max. Gate Triggering Current (Tip) K1 1 8 K1 (Tip) - High 150 mA min. Holding Current (Gate) G 2 7 A (Ground) Rated for LSSGR ‘1089 Conditions NC 3 6 A (Ground) Impulse ‘1089 Test ITSP (Ring) K2 4 5 K2 (Ring) Waveshape Section Test # A MD6XANB 4.5.7 4 NC - No internal connection 2/10 4.5.8 1 120 Terminal typical application names shown in parenthesis 10/360 4.5.7 2, 5 30 10/1000 4.5.7 1,3 30 Device Symbol K1 K1 60 Hz Power ‘1089 Test ITSM Fault Times Section Test # A 0.5 4.5.12 9 6.5 A 1 4.5.12 3, 4, 8 4.6 G A 2 4.5.12 7 3.4 4.5.12 5 5 2.3 4.5.13 2, 3 K2 K2 30 4.5.12 6 1.3 4.5.12 1, 2 Terminals K1, K2 and A correspond to the alternative line designators of T, R and G or A, B and C. The 900 4.5.13 1, 4, 5 0.73 negative protection voltage is controlled by the 4.5.15/16 voltage, VGG, applied to the G terminal. SD6XAEB 2/10 Overshoot Voltage Specified Rated for ITU-T K.20, K.21 and K.45 Element ITM = 100A, di/dt = 80A/μs Waveshape ITSP V Voltage Current A Diode 10 10/700 5/310 40 SCR 12 ............................................UL Recognized Components How To Order Device Package Carrier Order As TI SP61089B D (8-p in Small - Outl in e) Embossed Tape Reeled TISP61089BDR-S Description The TISP61089B is a dual forward-conducting buffered p-gate thyristor (SCR) overvoltage protector. It is designed to protect monolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. The TISP61089B limits voltages that exceed the SLIC supply rail voltage. The TISP61089B parameters are specified to allow equipment compliance with Bellcore GR-1089-CORE, Issue 2 and ITU-T recommendations K.20, K.21 and K.45. OCTOBER 2000 - REVISED JULY 2008 *RoHS Directive 2002/95/EC Jan 27 2003 including Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific WARNING Cancer and Reproductive Harm applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the www.P65Warnings.ca.gov last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Description (Continued) The SLIC line driver section is typically powered from 0 V (ground) and a negative voltage in the region of -20 V to -150 V. The protector gate is connected to this negative supply. This references the protection (clipping) voltage to the negative supply voltage. The protection voltage will then track the negative supply voltage and the overvoltage stress on the SLIC is minimized. Positive overvoltages are clipped to ground by diode forward conduction. Negative overvoltages are initially clipped close to the SLIC negative supply rail value. If sufficient current is available from the overvoltage, then the protector SCR will switch into a low voltage on-state condition. As the overvoltage subsides, the high holding current of TISP61089B SCR helps prevent d.c. latchup. The TISP61089B is intended to be used with a series combination of a 40 Ω or higher resistance and a suitable overcurrent protector. Power fault compliance requires the series overcurrent element to open-circuit or become high impedance (see Applications Information). For equipment compliant to ITU-T recommendations K.20 or K.21 or K.45 only, the series resistor value is set by the coordination requirements. For coordination with a 400 V limit GDT, a minimum series resistor value of 10 Ω is recommended. These monolithic protection devices are fabricated in ion-implanted planar vertical power structures for high reliability and in normal system operation they are virtually transparent. The TISP61089B buffered gate design reduces the loading on the SLIC supply during overvoltages caused by power cross and induction. The TISP61089B is available in a 8-pin plastic small-outline surface mount package. Absolute Maximum Ratings, -40 °C ≤ TJ ≤ 85 °C (Unless Otherwise Noted) Rating Symbol Value Unit Repetitive peak off-state voltage, VGK=0 VDRM -170 V Repetitive peak gate-cathode voltage, VKA=0 VGKRM -167 V Non-repetitive peak on-state pulse current (see Notes 1 and 2) 10/1000μs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4) 30 5/320μs (ITU-T K.20, K.21& K.45, K.44 open-circuit voltage wave shape 10/700μs) 40 10/360μs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4) ITSP 40 A 1.2/50μs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, Section 4) 100 2/10μs (Telcordia (Bellcore) GR-1089-CORE, Issue 2, February 1999, 120 Section 4) TJ = 25°C 170 Non-repetitive peak on-state current, 60 Hz (see Notes 1, 2 and 3) 0.5s 6.5 1s 4.6 2s ITSM 3.4 A 5s 2.3 30s 1.3 900s 0.73 Non-repetitive peak gate current, 1/2μs pulse, cathodes commoned (see Notes 1 and 2) IGSM +40 A Operating free-air temperature range TA -40 to +85 °C Junction temperature TJ -40 to +150 °C Storage temperature range Tstg -40 to +150 °C NOTES: 1. Initially, the protector must be in thermal equilibrium with -40°C≤TJ≤85°C. The surge may be repeated after the device returns to its initial conditions. 2. The rated current values may be applied either to the Ring to Ground or to the Tip to Ground terminal pairs. Additionally, both terminal pairs may have their rated current values applied simultaneously (in this case the Ground terminal current will be twice the rated current value of an individual terminal pair). Above 85°C, derate linearly to zero at 150°C lead temperature. 3. Values for VGG = -100V. For values at other voltages see Figure 2. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Recommended Operating Conditions Component Min Typ Max Unit CG TISP61089B gate decoupling capacitor 100 220 nF TISP61089B series resistor for GR-1089-CORE first-level surge survival 25 Ω TISP61089B series resistor for GR-1089-CORE first-level and second-level surge survival 40 Ω RS TISP61089B series resistor for GR-1089-CORE intra-building port surge survival 8 Ω TISP61089B series resistor for K.20, K.21 and K.45 coordination with a 400V primary 10 Ω protector Electrical Characteristics, TJ = 25 °C (Unless Otherwise Noted) Parameter Test Conditions Min Typ Max Unit TJ=25 °C -5 μA ID Off-state current VD=VDRM, VGK=0 TJ=85 °C -50 μA V(BO) Breakover voltage 2/10μs, ITM=-100A, di/dt = -80A/μs, RS=50Ω, VGG=-100V -112 V Gate-cathode impulse 2/10μs, ITM=-100A, di/dt = -80A/μs, RS=50Ω, VGG=-100V, VGK(BO) 12 V breakover voltage (see Note 4) VF Forward voltage IF=5A, tw=200μs 3 V Peak forward recovery VFRM 2/10μs, IF=100A, di/dt = 80A/μs, RS=50Ω, (see Note 4) 10 V voltage IH Holding current IT=-1A, di/dt = 1A/ms, VGG=-100V -150 mA TJ=25 °C -5 μA IGKS Gate reverse current VGG=VGK=VGKRM, VKA=0 TJ=85 °C -50 μA IGT Gate trigger current IT=-3A, tp(g)≥20μs, VGG=-100V 5 mA Gate-cathode trigger VGT IT=-3A, tp(g)≥20μs, VGG=-100V 2.5 V voltage Cathode-anode off- VD=-3V 100 pF CKA f=1MHz, Vd=1V, IG=0, (see Note 5) state capacitance VD=-48V 50 pF NOTES: 4. The diode forward recovery and the thyristor gate impulse breakover (overshoot) are not strongly dependent of the gate supply voltage value (VGG). 5. These capacitance measurements employ a three terminal capacitance bridge incorporating a guard circuit. The unmeasured device terminals are a.c. connected to the guard terminal of the bridge. Thermal Characteristics Parameter Test Conditions Min Typ Max Unit TA = 25°C, EIA/JESD51-3 PCB, EIA/ RθJA Junction to free air thermal resistance JESD51-2 environment, PTOT = 1.7 W 120 °C/W OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Parameter Measurement Information +i Quadrant I I (= | ) FSP TSP Forward Conduction Characteristic I (= | ) FSM TSM I F V F V GK(BO) -v VGG VD +v I D I (BO) I I H S V(BO) VS VT I T I TSM Quadrant III Switching ITSP Characteristic -i PM6XAAA Figure 1. Voltage-Current Characteristic Unless Otherwise Noted, All Voltages are Referenced to the Anode OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Thermal Information PEAK NON-RECURRING AC TYPICAL PEAK NON-RECURRING AC vs vs CURRENT DURATION CURRENT DURATION 20 TI61AF 20 TI61DA RING AND TIP TERMINALS: RING AND TIP TERMINALS: A 15 Equal I values applied 15 Equal I values applied — TSM A TSM ent 10 sGiRmOuUltaNnDe oTuEsRlyM INAL: nt — 10 GsiRmOuUltaNnDe oTuEsRlyM INAL: z Curr 678 Current twicEeI AIT /SJMEv SaDlu5e1 Curre 678 Currenttwice ITTSMy pviaclaul ePCB 0 H 5 Environment and Hz 5 Mounting, on-Recurrent 5 234 PVGCGB =, T-8AV0 G= VG 2 =5 -°6C0 V n-Recurrent 50 234 VGG=T -A8 =0V G2VG5 = ° C-60 V I — Peak NTSM0001....67851 VVGGGG == --112000 VV I — Peak NoTSM0001....67851 VVGGGG == --112000 VV 0.5 0.5 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 t — Current Duration — s t — Current Duration — s Figure 2. Non-Repetitive Peak On-State Current against Figure 3. Typical Non-Repetitive Peak On-state Current Duration against Duration OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector APPLICATIONS INFORMATION Operation of Ringing SLICs using Multiple Negative Voltage Supply Rails Figure 4 shows a typical powering arrangement for a multi-supply rail SLIC. VBATL is a lower (smaller) voltage supply than VBATH. With supply switch S1 in the position shown, the line driver amplifiers are powered between 0 V and VBATL. This mode minimizes the power consumption for short loop transmission. For long loops and to generate ringing, the driver voltage is increased by operating S1 to connect VBATH. These conditions are shown in Figure 5. SLIC 0 V S1 V LINE BATL V BATH LINE SUPPLY DRIVERS SWITCH AI6XCC Figure 4. SLIC with Voltage Supply Switching 0 V 0 V 0 V V SLICG V /2 PKRING V BATL V /2 PKRING VDCRING VBATH V /2 PKRING V /2 PKRING V SLICH V V BATH BATH SHORT LOOP LONG LOOP RINGING AI6XCD Figure 5. Driver Supply Voltage Levels Conventional ringing is typically unbalanced ground or battery backed. To minimize the supply voltage required, most multi-rail SLICs use balanced ringing as shown in Figure 5. The ringing has d.c., VDCRING, and a.c., VPKRING, components. A 70 V r.m.s. a.c. sinusoidal ring signal has a peak value, VPKRING, of 99 V. If the d.c. component was 20 V, then the total voltage swing needed would be 99 + 20 = 119 V. There are internal losses in the SLIC from ground, VSLICG, and the negative supply, VSLICH. The sum of these two losses generally amounts to a total of 10 V. This makes a total, VBATH, supply rail value of 119 + 10 = 129 V. In some cases a trapezoidal a.c. ring signal is used. This would have a peak to r.m.s ratio (crest factor) of about 1.25, increasing the r.m.s. a.c. ring level by 13 %. The d.c. ring voltage may be lowered for short loop applications. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector SLIC Parameter Values The table below shows some details of HV SLICs using multiple negative supply rails. Manufacturer INFINEON‡ LEGERITY™‡ Unit SLIC Series SLIC-P‡ ISLIC™‡ SLIC # PEB 4266 79R241 79R101 79R100 Data Sheet Issue 14/02/2001 -/08/2000 -/07/2000 -/07/2000 Short Circuit Current 110 150 150 150 mA VBATH max. -155 -104 -104 -104 V VBATL max. -150 -104 VBATH VBATH V AC Ringing for: 85 45† 50† 55† V rms Crest Factor 1.4 1.4 1.4 1.25 VBATH -70 -90 -99 -99 V VBATR -150 -36 -24 -24 V R or T Power Max. < 10 ms 10 W R or T Overshoot < 10 ms TBD TBD -5 5 -10 5 -10 5 V R or T Overshoot < 1 ms -10 +10 V R or T Overshoot < 1 μs -10 +30 -10 10 -15 8 -15 8 V R or T Overshoot < 250 ns -15 15 -20 12 -20 12 V Line Feed Resistance 20 + 30 50 50 50 Ω † Assumes -20V battery voltage during ringing. ‡ Legerity, the Legerity logo and ISLIC are the trademarks of Legerity, Inc. (formerly AMD’s Communication Products Division). Other product names used in this publication are for identification purposes only and may be trademarks of their respective companies. From the table, the maximum supply voltage, VBATH, is -155 V. In terms of minimum voltage overshoot limits, -10 V and +8 V are needed for 1 μs and -15 V, +12 V are needed for 250 ns. To maintain these voltage limits over the temperature range, 25 °C values of -12 V, +10 V are needed for 250 ns. It is important to define the protector overshoot under the actual circuit current conditions. For example, if the series line feed resistor was 40 Ω, R1 in Figure 12, and Telcordia GR-1089-CORE 2/10 and 10/1000 first-level impulses were applied, the peak protector currents would be 56 A and 20 A. At the second-level, the 2/10 impulse current would be 100 A. Therefore, the protector voltage overshoot should be guaranteed to not exceed the SLIC voltage ratings at 100 A, 2/10 and 20 A, 10/1000. In practice, as the 2/10 waveshape has the highest current (100 A) and fastest di/dt (80 A/μs) the overshoot level testing can restricted to the be 2/10 waveshape. Using the table values for maximum battery voltage and minimum overshoot gives a protection device requirement of -170 V and +12 V from the output to ground. There needs to be temperature guard banding for the change in protector characteristics with temperature. To cover down to -40 °C, the 25 °C protector minimum values become -185 V (VDRM) on the cathode and -182 V (VGKS) on the gate. Gated Protectors This section covers four topics. First, it is explained why gated protectors are needed. Second, the voltage limiting action of the protector is described. Third, how the withstand voltages of the TISP61089B junctions are set. Fourth, an example application circuit is described. Purpose of Gated Protectors Fixed voltage thyristor overvoltage protectors have been used since the early 1980s to protect monolithic SLICs (Subscriber Line Interface Circuits) against overvoltages on the telephone line caused by lightning, a.c. power contact and induction. As the SLIC was usually powered from a fixed voltage negative supply rail, the limiting voltage of the protector could also be a fixed value. The TISP1072F3 is a typical example of a fixed voltage SLIC protector. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Gated Protectors (Continued) SLICs have become more sophisticated. To minimize power consumption, some designs automatically adjust the driver supply voltage to a value that is just sufficient to drive the required line current. For short lines, the supply voltage would be set low, but for long lines, a higher supply voltage would be generated to drive sufficient line current. The optimum protection for this type of SLIC would be given by a protection voltage which tracks the SLIC supply voltage. This can be achieved by connecting the protection thyristor gate to the SLIC VBATH supply, Figure 6. This gated (programmable) protection arrangement minimizes the voltage stress on the SLIC, no matter what value of supply voltage. TIP SLIC TISP61089B WIRE 600 ΩΩΩΩ R1 40 ΩΩΩΩ V BATL GENERATOR SOURCE RESISTANCE SWITCHING MODE R2 POWER SUPPLY 600 ΩΩΩΩ 40 ΩΩΩΩ ISLIC Tx RING WIRE A.C. C2 I GENERATOR C1 G 0 - 600 V r.m.s. 220 nF VBATH IBATH D1 AI6XCC Figure 6. TISP61089B Buffered Gate Protector (‘1089 Section 4.5.12 Testing) SLIC SLIC PROTECTOR SLIC PROTECTOR SLIC I Th5 IF Th5 K TISP I TISP 61089B G 61089B V V BATH C1 BATH C1 AI6XAHB 220 nF AI6XAIB 220 nF Figure 7. Negative Overvoltage Condition Figure 8. Positive Overvoltage Condition Operation of Gated Protectors Figure 7 and Figure 8 show how the TISP61089B limits negative and positive overvoltages. Positive overvoltages (Figure 8) are clipped by the antiparallel diode of Th5 and the resulting current is diverted to ground. Negative overvoltages (Figure 7) are initially clipped close to the SLIC negative supply rail value (VBATH). If sufficient current is available from the overvoltage, then Th5 will switch into a low voltage on-state condition. As the overvoltage subsides the high holding current of Th5 prevents d.c. latchup. The protection voltage will be the sum of the gate supply (VBATH) and the peak gate-cathode voltage (VGK(BO)). The protection voltage will be increased if there is a long connection between the gate decoupling capacitor, C1, and the gate terminal. During the initial rise of a fast impulse, the gate current (IG) is the same as the cathode current (IK). Rates of 80 A/μs can cause inductive voltages of 0.8 V in 2.5 cm of printed wiring track. To minimize this inductive voltage increase of OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Gated Protectors (Continued) protection voltage, the length of the capacitor to gate terminal tracking should be minimized. Inductive voltages in the protector cathode wiring will also increase the protection voltage. These voltages can be minimized by routing the SLIC connection through the protector as shown in Figure 6. Figure 9, which has a 10 A/μs rate of impulse current rise, shows a positive gate charge (QGS) of about 0.1 μC. With the 0.1 μF gate decoupling capacitor used, the increase in gate supply is about 1 V (= QGS/C1). This change is just visible on the -72 V gate voltage, VBATH. But, the voltage increase does not directly add to the protection voltage as the supply voltage change reaches a maximum at 0.4 μs, when the gate current reverses polarity, and the protection voltage peaks earlier at 0.3 μs. In Figure 9, the peak clamping voltage (V(BO)) is -77.5 V, an increase of 5.5 V on the nominal gate supply voltage. This 5.5 V increase is the sum of the supply rail increase at that time, (0.5 V), and the protection circuit’s cathode diode to supply rail breakover voltage (5 V). In practice, use of the recommended 220 nF gate decoupling capacitor would give a supply rail increase of about 0.3 V and a V(BO) value of about -77.3 V. 0 -20 V ge- VK VBATH a -40 t lo V -60 -80 0.0 0.5 1.0 1.5 Time - μs AI6XDE 1 Q GS I G 0 -1 A ent- -2 IK r r u C -3 -4 -5 0.0 0.5 1.0 1.5 Time - μs Figure 9. Protector Fast Impulse Clamping and Switching Waveforms Voltage Stress Levels on the TISP61089B Figure 10 shows the protector electrodes. The package terminal designated gate, G, is the transistor base, B, electrode connection and so is marked as B (G). The following junctions are subject to voltage stress: Transistor EB and CB, SCR AK (off state) and the antiparallel diode (reverse blocking). This clause covers the necessary testing to ensure the junctions are good. Testing transistor CB and EB: The maximum voltage stress level for the TISP61089B is VBATH with the addition of the short term antiparallel diode voltage overshoot, VFRM. The current flowing out of the G terminal is measured at VBATH plus VFRM. The SCR K terminal is shorted to the common (0 V) for this test (see Figure 10). The measured current, IGKS, is the sum of the junction currents ICB and IEB. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Gated Protectors (Continued) 0 V I V CB BATH + V B (G) FRM K I GKS TISP IEB 61089B AI6XCE Figure 10. Transistor CB and EB Verification Testing transistor CB, SCR AK off state and diode reverse blocking: The highest AK voltage occurs during the overshoot period of the protector. To make sure that the SCR and diode blocking junctions do not break down during this period, a d.c. test for off-state current, ID, can be applied at the overshoot voltage value. To avoid transistor CB current amplification by the transistor gain, the transistor base-emitter is shorted during this test (see Figure 11). 0 V 0 V I CB V(BO) I I B (G) TISP R D(I) A 61089B K I D AI6XCF I is the internal SCR value of I D(I) D Figure 11. Off-State Current Verification Summary: Two tests are needed to verify the protector junctions. Maximum current values for IGKS and ID are required at the specified applied voltage conditions. OVER- CURRENT RING/TEST TEST RING SLIC SLIC PROTECTION PROTECTION RELAY RELAY RELAY PROTECTOR SLIC TIP WIRE R1a Th1 S3a Th4 S1a S2a Th3 R1b Th2 Th5 RING WIRE TISP S3b TISP 3xxxF3 61089B OR S1b S2b 7xxxF3 V BATH C1 220 nF TEST EQUIP- RING MENT AI6XAJB GENERATOR Figure 12. Typical Application Circuit OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Application Circuit Figure 12 shows a typical TISP61089B SLIC card protection circuit. The incoming line conductors, Ring (R) and Tip (T), connect to the relay matrix via the series overcurrent protection. Fusible resistors, fuses and positive temperature coefficient (PTC) resistors can be used for overcurrent protection. Resistors will reduce the prospective current from the surge generator for both the TISP61089B and the ring/test protector. The TISP7xxxF3 protector has the same protection voltage for any terminal pair. This protector is used when the ring generator configuration may be ground or battery-backed. For dedicated ground-backed ringing generators, the TISP3xxxF3 gives better protection as its inter-conductor protection voltage is twice the conductor to ground value. Relay contacts 3a and 3b connect the line conductors to the SLIC via the TISP61089B protector. The protector gate reference voltage comes from the SLIC negative supply (VBATH). A 220 nF gate capacitor sources the high gate current pulses caused by fast rising impulses. LSSGR 1089 GR-1089-CORE, “1089”, covers electromagnetic compatibility and electrical safety generic criteria for US network telecommunication equipment. It is a module in Volume 3 of LSSGR (LATA (Local Access Transport Area) Switching Systems Generic Requirements, FR-NWT-000064). In ‘1089, surge and power fault immunity tests are done at two levels. After first-level testing, the equipment shall not be damaged and shall continue to operate correctly. Under second-level testing, the equipment shall not become a safety hazard. The equipment is permitted to fail as a result of second-level testing. When the equipment is to be located on customer premises, second-level testing includes a wiring simulator test, which requires the equipment to reduce the power fault current below certain values. The following clauses reference the ‘1089 section and calculate the protector stress levels. The TISP61089B needs a 40 Ω series resistor to survive second-level surge testing. To survive first-level testing and possibly fail under second-level testing allows lower resistor value of 25 Ω to be used. Tabulated current values are given for both 40 Ω and 25 Ω series resistor values. ‘1089 Section 4.5.5 - Test Generators The generic form of test generator is shown in Figure 13. It emphasises that multiple outputs must be independent, i.e. the loading condition of one output must not affect the waveforms of the other outputs. It is a requirement that the open-circuit voltage and short circuit current waveforms be recorded for each generator output used for testing. The fictive impedance of a generator output is defined as the peak open- circuit voltage divided by the peak short-circuit current. Specified impulse waveshapes are maximum rise and minimum decay times. Thus, the 10/1000 waveshape should be interpreted as <10/>1000 and not the usually defined nominal values which have a tolerance. Z Output 1 Z Output 2 Z Output n Z Output n + 1 or Z is the fictive current-limiting impedance in each output feed Return AI6XCJ Generic Lightning or AC Test Generator Figure 13. ‘1089 Test Generators OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.5 - Test Generators (Continued) The exception to these two conditions of independence and limit waveshape values is the alternative IEEE C.62.41, 1.2/50-8/20 combination wave generator which may be used for testing in ‘1089 Sections 4.5.7, 4.5.8 and 4.5.9. Here, the quoted waveshape values are nominal with defined tolerance. The open-circuit voltage waveshape is 1.2 μs±0.36 μs front time and 50 μs±10 μs duration. The short-circuit current waveshape is 8 μs+1.0 μs, -2.5 μs front time and 20 μs+8 μs, -4 μs duration. The generator fictive source impedance (peak open-circuit voltage divided by peak short-circuit current) is 2.0 Ω±0.25 Ω. To get the same peak short-circuit currents as the 2/10 generator, for the same peak open-circuit voltage setting, ‘1089 specifies that the 1.2/50-8/20 generator be used with external resistors for current limiting and sharing. When working into a finite resistive load, the delivered 1.2/50-8/20 generator current waveshape moves towards the 1.2/50 voltage waveshape. Thus, although the 1.2/50-8/20 delivered peak current is similar to the 2/10 generator, the much longer current duration means that a much higher stress is imposed on the equipment protection circuit. This can cause fuses to operate which are perfectly satisfactory on the normal 2/10 generator. Testing with the 1.2/50-8/20 generator gives higher stress levels than the 2/10 generator and, because it is seldom used, will not be covered in this analysis. Output 1 Ring V1 Output 2 Tip V2 Return Ground AI6XCK Test Generator EUT (Equipment UnderTest) Figure 14. Longitudinal (also C alled Common Mode) Testing Output 1 Ring V1 Output 2 Tip Return Ground Test Generator EUT (Equipment Under Test) Output 1 Ring Output 2 Tip V2 Return Ground AI6XCM Test Generator EUT (Equipment Under Test) Figure 15. Transverse (also Called Differential or Metallic) Testing OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.6 - Test Connections The telecommunications port R and T terminals may be tested simultaneously or individually. Figure 14 shows connection for simultaneous (longitudinal) testing. Figure 15 shows the two connections necessary to individually test the R and T terminals during transverse testing. The values of protector current are calculated by dividing the open-circuit generator voltage by the total circuit resistance. The total circuit resistance is the sum of the generator fictive source resistance and the TISP61089B series resistor value. The starting point of this analysis is to calculate the minimum circuit resistance for a test by dividing the generator open-circuit voltage by the TISP61089B rating. Subtracting the generator fictive resistance from the minimum circuit resistance gives the lowest value of series resistance that can be used. This is repeated for all test connections. As the series resistance must be a fixed value, the value used has to be the highest value calculated from all the considered test connections. Where both 10/1000 and 2/10 waveshape testing occurs, the 10/1000 test connection gives the highest value of minimum series resistance. Unless otherwise stated, the analysis assumes a -40 °C to +85 °C temperature range. ‘1089 Section 4.5.7 - First-Level Lightning Surge Testing Table 1 shows the tests for this section. The peak TISP61089B current, ITM, is calculated by dividing the generator open voltage by the sum of the generator fictive source and the line feed, RS, resistance values. Columns 9 and 10 show the resultant currents for RS values of 25 Ω and 40 Ω. The TISP61089B rated current values at the various waveshapes are higher than those listed in Table 1. Used with the specified values of RS, the TISP61089B will survive these tests. Table 1. First-Level Surge Currents Generator TISP61089B ITM Open-circuit Short-circuit No Fictive A Surge Test Primary Waveshape Voltage Current of Source # Connections Fitted V A Tests Resistance Ω Rs = 25Ω Rs = 40Ω 1 10/1000 600 100 +25, -25 Transverse & No 6 19 & 13 & Longitudinal 2x19 2x13 2 10/360 1000 100 +25, -25 Transverse & No 10 29 & 20 & Longitudinal 2x29 2x20 3 10/1000 1000 100 +25, -25 Transverse & No 10 29 & 20 & Longitudinal 2x29 2x20 4 2/10 2500 500 +10, -10 Longitudinal No 5 2x83 2x56 5 10/360 1000 25 +5, -5 Longitudinal No 40 2x15 2x13 NOTES: 1. Surge 3 may be used instead of Surge 1 and Surge 2. 2. Surge 5 is applied to multiple line pairs up to a maximum of 12. 3. If the equipment contains a voltage-limiting secondary protector, each test is repeated at a voltage just below the threshold of limiting. ‘1089 Section 4.5.8 - Second-Level Lightning Surge Testing Table 2 shows the 2/10 test used for this section. Columns 9 and 10 show the resultant currents for RS values of 25 Ω and 40 Ω. Used with an RS of 40 Ω, the TISP61089B with survive this test. The 25 Ω value of RS is only intended to give first-level (Section 4.5.7) survival. Under second-level conditions, the peak current will be 2x143 A, which may result in failure of the 2x120 A rated TISP61089B. However, if the testing is done at or near 25 °C, the TISP61089B will survive with an RS value of 25 Ω as the 2/10 rating is 170 A at this temperature. Table 2. Second-Level Surge Current Generator TISP61089B ITM Open-circuit Short-circuit No Fictive A Surge Test Primary Waveshape Voltage Current of Source # Connections Fitted V A Tests Resistance Rs = 25ΩΩΩΩ Rs = 40ΩΩΩΩ ΩΩΩΩ 1 2/10 5000 500 +1, -1 Longitudinal No 10 2x143 2x100 NOTE: 1. If the equipment contains a voltage-limiting secondary protector, the test is repeated at a voltage just below the threshold of limiting. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.9 - Intra-Building Lightning Surge Testing This test is for network equipment ports that do not serve outside lines. Table 3 shows the 2/10 tests used for this section. Dedicated intra- building ports may use an RS value of 8 Ω. The 8 Ω value is set by the intra-building second-level a.c. testing of Section 4.5.16. Columns 9, 10 and 11 show the resultant currents for RS values of 8 Ω, 25 Ω and 40 Ω. The listed currents are lower than the TISP61089B current rating of 2x120 A and the TISP61089B will survive these tests. Table 3. Intra-building Lightning Surge Currents Generator TISP61089B ITM Open-circuit Short-circuit No Fictive A Surge Test Primary Waveshape Voltage Current of Source # Connections Fitted V A Tests Resistance Rs = 8ΩΩΩΩ Rs = 25ΩΩΩΩ Rs = 40ΩΩΩΩ ΩΩΩΩ 1 2/10 800 100 +1, -1 Transverse NA 8 50 24 17 2 2/10 1500 100 +1, -1 Longitudinal NA 15 2x65 2x38 2x27 NOTE: 1. If the equipment contains a voltage-limiting secondary protector, the test is repeated at a voltage just below the threshold of limiting. ‘1089 Section 4.5.11 - Current-Limiting Protector Testing Equipment that allows unacceptable current to flow during power faults (Figure 16) shall be specified to use an appropriate current-limiting protector. The equipment performance can be determined by testing with a series fuse, which simulates the safe current levels of a telephone cable. If this fuse opens, the equipment allows unacceptable current flow and an external current-limiting protector must be specified. For acceptable currents, the equipment must not allow current flows for times that would operate the simulator. The wiring simulator fuse current- time characteristic shall match the boundary of Figure 16. A Bussmann MDQ-1 6/10 fuse is often specified as meeting this requirement, Figure 17. '1089 WIRING SIMULATOR CURRENT MDQ-16/ OPERATING CURRENT 10 vs vs TIME AVERAGE MELT TIME TI6LAG TI6LAH 80 80 70 70 60 60 50 50 40 40 30 30 25 25 ms 20 ms20 A r 15 UNACCEPTABLE A r15 UNACCEPTABLE — REGION — REGION uenrrt 108 urrent 108 MDQ-16/10 C 7 C 7 6 6 5 ACCEPTABLE 5 4 REGION 4 3 3 2.5 2.5 2 2 0·01 0·1 1 10 100 1000 0·01 0·1 1 10 100 1000 t - Current Duration - s t - Current Duration - s Figure 16. Wiring Simulator Current-Time Figure 17. MDQ-16/10 Current-Time OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.11 - Current-Limiting Protector Testing (Continued) The test generator has a voltage source that can be varied from zero to 600 V rms and an output resistance of 20 Ω to each conductor. Table 4 shows the range of currents conducted by the TISP61089B. Table 4. Wiring Simulator Testing Open-Circuit Short-Circuit Source TISP61089B ITM AC Duration Test Primary RMS Voltage RMS Current Resistance A (peak) s Connections Fitted V A ΩΩΩΩ Rs = 25Ω Rs = 40ΩΩΩΩ 900 0 to 600 0 to 30 Transverse & Longitudinal No 20 0 to 2x 19 0 to 2x 14 ‘1089 Section 4.5.12 - First-Level Power Fault Testing Table 5 shows the nine tests used for this section. The TISP61089B will survive these peak current values as they are lower than the TISP61089B current-time ratings. Table 5. First-Level Power Fault Currents Open-circuit Short-circuit No Source TISP61089B ITM Test AC Duration Test Primary RMS Voltage RMS Current of Resistance A (peak) # s Connections Fitted V A Tests ΩΩΩΩ Rs = 25Ω Rs = 40ΩΩΩΩ Transverse & 1 900 50 0.33 1 No 150 2x0.40 2x0.37 Longitudinal Transverse & 2 900 100 0.17 1 No 600 2x0.23 2x0.22 Longitudinal 200 0.33 60 2x0.45 2x0.44 Transverse & 3 1 400 0.67 60 No 600 2x0.90 2x0.89 Longitudinal 600 1.00 60 2x1.36 2x1.33 4 1 1000 1 60 Longitudinal Yes 1000 2x1.38 2x1.30 5 5 600 0.09 60 Differential No Capacitive 2x0.12 2x0.12 Transverse & 6 30 600 0.5 1 No 1200 2x0.69 2x0.68 Longitudinal Transverse & 7 2 600 2.2 1 No 273 2x2.85 2x2.71 Longitudinal Transverse & 8 1 600 3.0 1 No 200 2x3.77 2x3.54 Longitudinal 9 0.5 1000 5 1 Longitudinal Yes 200 2x6.28 2x5.89 NOTES: 1. If the equipment contains a voltage-limiting device or a current-limiting device, tests 1, 2 and 3 are repeated at a level just below the thresholds of the limiting devices. 2. Test 5 uses a special circuit with transformer coupled a.c. and capacitive feed. 3. Tests 1 through 5 are requirements and the equipment shall not be damaged after these tests. 4. Tests 6 through 9 are desirable objectives and the equipment can be damaged after these tests. ‘1089 Section 4.5.13 - Second-Level Power Fault Testing for Central Office Equipment Table 6 shows the five tests used for this section. Columns 9 and 10 show the prospective currents for these tests using RS values of 25 Ω and 40 Ω. The two most stressful tests of this section are test 1 and test 2. As shown in Table 6, the peak currents for these tests are 2x17 A and 2x7.7 A respectively. With the exception of test 5, all the other tests require the series overcurrent protection to operate before the TISP61089B current-time ratings are exceeded. In the case of test 2, with an RS of 25 Ω, the overcurrent protection must operate within the initial a.c. half cycle to prevent damage. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.13 - Second-Level Power Fault Testing for Central Office Equipment (Continued) Table 6. Second-Level Power Fault Currents Open-circuit Short-circuit No Source TISP61089B ITM Test AC Duration Test Primary RMS Voltage RMS Current of Resistance A (peak) # s Connections Fitted V A Tests ΩΩΩΩ Rs = 25Ω Rs = 40ΩΩΩΩ 120 1 Transverse & 5 2x5.7 2x3.8 1 900 25 No 277 1 Longitudinal 11 2x11 2x7.7 Transverse & 2 5 600 60 1 No 10 2x24 2x17 Longitudinal Transverse & 3 5 600 7 1 No 86 2x7.7 2x6.8 Longitudinal 100 to 0.37 to Transverse & 4 900 No 270 2x2.9 2x2.7 600 2.2 Longitudinal 5 900 600 0.09 60 Differential No Capacitive 2x0.09 2x0.09 NOTES: 1. If the equipment contains a voltage-limiting device or a current-limiting device, these tests are repeated at a level just below the thresholds of the limiting devices. 2. Test 5 uses a special circuit with transformer coupled a.c. and capacitive feed. ‘1089 Section 4.5.15 - Second-Level Power Fault Testing for Equipment Located on the Customer Premise This test, Table 7, is for network equipment located on the customer premises. The purpose is to ensure that the feed wiring does not become a hazard due to excessive current. This testing is similar to the Section 4.5.11 testing. If the equipment is directly wired, the wiring simulator described in Section 4.5.11 is replaced by a one-foot section of 26 AWG wrapped in cheesecloth. The equipment fails if an open circuit occurs or the cheesecloth is damaged. Table 7 shows the test conditions for this section. Columns 7 and 8 show the prospective currents using RS values of 25 Ω and 40 Ω. For the TISP61089B to survive, the series overcurrent protection to operate before the TISP61089B current-time ratings are exceeded. Table 7. Customer Premise Wiring Simulator Testing Open-circuit Short-circuit Source TISP61089B ITM AC Duration Test Primary RMS Voltage RMS Current Resistance A (peak) s Connections Fitted V A ΩΩΩΩ Rs = 25Ω Rs = 40ΩΩΩΩ 900 0 to 600 0 to 30 Transverse & Longitudinal No 20 0 to 2x 19 0 to 2x 14 NOTE: 1. If the equipment interrupts the current before the 600V rms level is reached, a second piece of equipment is tested. The second piece of equipment shall withstand 600Vrms applied for 900s without causing a hazard. ‘1089 Section 4.5.16 - Second-Level Intra-Building Power Fault Testing for Equipment Located on the Customer Premise This test, Table 8, is for network equipment ports that do not serve outside lines. For standard plugable premise wiring, the wiring simulator fuse shall be used for testing. Where direct wiring occurs, the simulator shall consist of a length of the wire used wrapped in cheesecloth. The equipment fails if a hazard occurs or a wiring simulator open circuit occurs or the cheesecloth is damaged. Table 8. Second-Level Power Fault Currents Open-circuit Short-circuit No Source TISP61089B ITM Test AC Duration Test Primary RMS Voltage RMS Current of Resistance A (peak) # s Connections Fitted V A Tests ΩΩΩΩ Rs = 8Ω Rs = 25Ω Rs = 40ΩΩΩΩ Transverse & 1 900 120 25 1 No 5 2x13 2x5.7 2x3.8 Longitudinal NOTE: 1. If the equipment contains a voltage-limiting device or a current-limiting device, these tests are repeated at a level just below the thresholds of the limiting devices. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector ‘1089 Section 4.5.16 (Continued) Dedicated intra-building ports may use an R value of 8 Ω. The 8 Ω value limits the initial current to 13 A, which is within the TISP61089B S single cycle rating. For the TISP61089B to survive the full 900 s test, the series overcurrent protection to operate before the TISP61089B current-time ratings are exceeded. Overcurrent and Overvoltage Protection Coordination To meet ‘1089, the overcurrent protection must be coordinated with the requirements of Sections 4.5.7, 4.5.8, 4.5.9, 4.5.12, 4.5.13, 4.5.15 and the TISP61089B. The overcurrent protection must not fail in the first-level tests of Sections 4.5.7, 4.5.9 and 4.5.12 (tests 1 through 5). Test 6 through 9 of Section 4.5.12 are not requirements. The test current levels and their duration are shown in Figure 18. First-level tests have a high source resistance and the current levels are not strongly dependent on the TISP61089B series resistor value. Second-level tests have a low source resistance and the current levels are dependent on the TISP61089B RS resistor value. The two stepped lines at the top of Figure 18 are for the 25 Ω and 40 Ω series resistor cases. The unacceptable current region (Section 4.5.11) is also shown in Figure 18. If current flows for the full second-level test time, the unacceptable current region will be entered. The series overcurrent protector must operate before the unacceptable region is reached. MAXIMUM RMS CURRENT PEAK AC vs vs TIME AI6XAKB CURRENT DURATION 30 AI6XDM 50 20 Second Level Tests, 25 Ω 40 Second Level 30 Tests, 25 ΩΩΩΩ Unacceptable 10 20 Second Level nt - A 57 Tests, 40 ΩΩΩΩ Unacceptable nt— A 11850 STeesctosn, d4 0L eΩΩΩΩvel RMS Curre 23 FtOhTirrebsosjtue tLsgce t#hiv v e96el HzCurre0 3456 VGG = -60 V 6 2 mum 0.71 First Level Hz / 1.5 Maxi 00..35 thTreosutsg h# 51, Peak 50 000...5681 F Tiresst tLse #v e1l 0.4 through 5, 0.2 25 ΩΩΩΩ & 40 ΩΩΩΩ 0.3 V = -120 V 25 ΩΩΩΩ & 40 ΩΩΩΩ GG 0.2 0.1 0.15 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 Time - s t — Current Duration — s Figure 18. ‘1089 Test Current Levels Figure 19. TIS P61089B Overlay Fusible overcurrent protectors cannot operate at first-level current levels. Thus, the permissible low current time-current boundary for fusible overcurrent protectors is formed by the first-level test currents. Automatically resettable overcurrent protectors (e.g. Positive Temperature Coefficient Thermistors) may operate during first-level testing, but normal equipment working must be restored after the test has ended. At system level, the high current boundary is formed by the unacceptable region. However, component and printed wiring, PW, current limitations will typically lower the high current boundary. Although the series line feed resistance, RS, limits the maximum available current in second-level testing, after about 0.5 s this limitation will exceed the acceptable current flow values. These three boundaries, first-level, second-level and unacceptable, are replotted in terms of peak current rather than rms current values in Figure 19. Using a peak current scale allows the TISP61089B longitudinal current rating curves (Figure 3) to be added to Figure 19. Assuming the PW is sized to adequately carry any currents that may flow, the high current boundary for the overcurrent protector is formed by the TISP61089B rated current. Note that the TISP61089B rated current curve also depends on the value of gate supply voltage. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Overcurrent and Overvoltage Protection Coordination (Continued) The overcurrent protector should not allow current-time durations greater than the TISP61089B current ratings, otherwise the TISP61089B may fail. A satisfactory fusible resistor performance is shown in Figure 20. The line feed resistor (LFR) current-time curve is above the first-level currents and below the TISP61089B rated current for VGG > -100 V. This particular curve is for a Bourns 4B04B-523-400 2 x 40 Ω, 2 % tolerance, 0.5 % matched resistor module. Fusible resistors are also available with integrated thermal fuses or PTC thermistors. Thermal fuses will cause a rapid drop in the operating current after about 10 s. Figure 20 shows the fused LFR curve for a Bourns 4B04B-524-400 2 x 40 Ω, 2 % tolerance, 0.5 % matched resistor module with integrated thermal fuse links. The Bourns 4B04B-524-400 allows the TISP61089B to operate down to its full rated voltage of VGG = -155 V. An LFR with integrated PTC thermistors will give an automatically resettable current limiting function for all but the highest currents. PEAK AC vs CURRENT DURATION AI6XDKA 50 40 30 20 A 15 — 10 nt 8 e urr 56 VGG= -120 V C 4 z V = -60 V H 3 GG 60 2 LFR z / 1.5 H 50 0.81 First Level k a 0.6 Tests # 1 Fused LFR e 0.5 P 0.4 through 5, 0.3 25 ΩΩΩΩ & 40 ΩΩΩΩ 0.2 0.15 0.01 0.1 1 10 100 1000 t — Cu rrent Duration — s Figure 20. Line Feed Resistor - with and without Thermal Fuse Ceramic PTC thermistors are available in suitable ohmic values to be used as the series line feed resistor RS . Figure 21 overlays a typical ceramic PTC thermistor operating characteristic. Some of the first-level tests will cause thermistor operation. Generally, the resistance matching stability of the two PTC thermistors after power fault switching lightning will meet the required line balance performance. Ceramic PTC thermistors reduce in resistance value under high voltage conditions. Under high current impulse conditions, the resistance can be less than 50 % of the d.c. resistance. This means that more current than expected will flow under high voltage impulse conditions. The manufacturer should be consulted on the 2/10 currents conducted by their product under ‘1089 conditions. To keep the 2/10 current below 120 A, an increase of the PTC thermistor d.c. resistance value to 50 Ω or more may be needed. In controlled temperature environments, where the temperature does not drop below freezing, the TISP61089B 2/10 capability is about 170 A, and this would allow a lower value of resistance. Generally, polymer PTC thermistors are not available in sufficiently high ohmic values to be used as the only line feed resistance. To meet the required resistance value, an addition (fixed) series resistance can be used. Figure 22 overlays a typical polymer PTC thermistor operating characteristic. Compared to ceramic PTC thermistors, the lower thermal mass of the polymer type will generally give a faster current reduction time than the ceramic type. However, in this case the polymer resistance value is much less than the ceramic value. For the same current level, the dissipation in the polymer thermistor is much less than the ceramic thermistor. As a result, the polymer thermistor is slower to operate than the ceramic one. The resistance stability of polymer PTC thermistors is not as good as ceramic ones. However, the thermistor resistance change will be diluted by additional series resistance. If an SLIC with adaptive line balance is used, thermistor resistance stability may not be a problem. Polymer PTC thermistors do not have a resistance decrease under high voltage conditions. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector Overcurrent and Overvoltage Protection Coordination (Continued) PEAK AC PEAK AC vs vs CURRENT DURATION CURRENT DURATION AI6XDIA AI6XDJA 50 50 40 40 30 30 20 20 A 15 A 15 — — 10 10 nt 8 nt 8 urre 56 VGG = -120 V urre 56 VGG = -120 V C 4 C 4 Hz 3 Ceramic PTC VGG = -60 V Hz 3 Polymer PTC VGG = -60 V 60 2 Thermistor 60 2 Thermistor z / 1.5 z / 1.5 H H k 50 0.81 First Level k 50 0.81 First Level a 0.6 Tests # 1 a 0.6 Tests # 1 Pe 0.5 Pe 0.5 0.4 through 5, 0.4 through 5, 0.3 0.3 25 ΩΩΩΩ & 40 ΩΩΩΩ 25 ΩΩΩΩ & 40 ΩΩΩΩ 0.2 0.2 0.15 0.15 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 t — Current Duration — s t — Current Duration — s Figure 21. Ceramic PTC Thermistor Figure 22. Polymer PTC Thermistor OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

TISP61089B High Voltage Ringing SLIC Protector MECHANICAL DATA Device Symbolization Code Devices will be coded as below. Symbolization Device Code TISP61089B 61089B “TISP” is a trademark of Bourns, Ltd., a Bourns Company, and is Registered in U.S. Patent and Trademark Office. “Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries. OCTOBER 2000 - REVISED JULY 2008 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

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(cid:59)(cid:79)(cid:76)(cid:3)(cid:92)(cid:90)(cid:76)(cid:3)(cid:72)(cid:85)(cid:75)(cid:3)(cid:83)(cid:76)(cid:93)(cid:76)(cid:83)(cid:3)(cid:86)(cid:77)(cid:3)(cid:91)(cid:76)(cid:90)(cid:91)(cid:80)(cid:85)(cid:78)(cid:3)(cid:72)(cid:87)(cid:87)(cid:83)(cid:80)(cid:74)(cid:72)(cid:73)(cid:83)(cid:76)(cid:3)(cid:91)(cid:86)(cid:3)(cid:41)(cid:86)(cid:92)(cid:89)(cid:85)(cid:90)® custom products shall be negotiated on a case-by-case basis by Bourns and the user for which such Bourns®(cid:3)(cid:74)(cid:92)(cid:90)(cid:91)(cid:86)(cid:84)(cid:3)(cid:87)(cid:89)(cid:86)(cid:75)(cid:92)(cid:74)(cid:91)(cid:90)(cid:3)(cid:72)(cid:89)(cid:76)(cid:3)(cid:90)(cid:87)(cid:76)(cid:74)(cid:80)(cid:72)(cid:83)(cid:83)(cid:96)(cid:3)(cid:75)(cid:76)(cid:90)(cid:80)(cid:78)(cid:85)(cid:76)(cid:75)(cid:21)(cid:3)(cid:3)(cid:40)(cid:73)(cid:90)(cid:76)(cid:85)(cid:91)(cid:3)(cid:72)(cid:3)(cid:94)(cid:89)(cid:80)(cid:91)(cid:91)(cid:76)(cid:85)(cid:3)(cid:72)(cid:78)(cid:89)(cid:76)(cid:76)(cid:84)(cid:76)(cid:85)(cid:91)(cid:3)(cid:73)(cid:76)(cid:91)(cid:94)(cid:76)(cid:76)(cid:85)(cid:3)(cid:41)(cid:86)(cid:92)(cid:89)(cid:85)(cid:90)(cid:3) (cid:72)(cid:85)(cid:75)(cid:3)(cid:91)(cid:79)(cid:76)(cid:3)(cid:92)(cid:90)(cid:76)(cid:89)(cid:3)(cid:89)(cid:76)(cid:78)(cid:72)(cid:89)(cid:75)(cid:80)(cid:85)(cid:78)(cid:3)(cid:91)(cid:79)(cid:76)(cid:3)(cid:92)(cid:90)(cid:76)(cid:3)(cid:72)(cid:85)(cid:75)(cid:3)(cid:83)(cid:76)(cid:93)(cid:76)(cid:83)(cid:3)(cid:86)(cid:77)(cid:3)(cid:90)(cid:92)(cid:74)(cid:79)(cid:3)(cid:91)(cid:76)(cid:90)(cid:91)(cid:80)(cid:85)(cid:78)(cid:19)(cid:3)(cid:91)(cid:79)(cid:76)(cid:3)(cid:72)(cid:73)(cid:86)(cid:93)(cid:76)(cid:3)(cid:87)(cid:89)(cid:86)(cid:93)(cid:80)(cid:90)(cid:80)(cid:86)(cid:85)(cid:90)(cid:3)(cid:72)(cid:87)(cid:87)(cid:83)(cid:80)(cid:74)(cid:72)(cid:73)(cid:83)(cid:76)(cid:3)(cid:91)(cid:86)(cid:3)(cid:41)(cid:86)(cid:92)(cid:89)(cid:85)(cid:90)® standard products shall also apply to such Bourns® custom products. Users shall not sell, transfer, export or re-export any Bourns®(cid:3)(cid:87)(cid:89)(cid:86)(cid:75)(cid:92)(cid:74)(cid:91)(cid:90)(cid:3)(cid:86)(cid:89)(cid:3)(cid:91)(cid:76)(cid:74)(cid:79)(cid:85)(cid:86)(cid:83)(cid:86)(cid:78)(cid:96)(cid:3)(cid:77)(cid:86)(cid:89)(cid:3)(cid:92)(cid:90)(cid:76)(cid:3)(cid:80)(cid:85)(cid:3)(cid:72)(cid:74)(cid:91)(cid:80)(cid:93)(cid:80)(cid:91)(cid:80)(cid:76)(cid:90)(cid:3)(cid:94)(cid:79)(cid:80)(cid:74)(cid:79)(cid:3)(cid:80)(cid:85)(cid:93)(cid:86)(cid:83)(cid:93)(cid:76)(cid:3)(cid:91)(cid:79)(cid:76)(cid:3) (cid:75)(cid:76)(cid:90)(cid:80)(cid:78)(cid:85)(cid:19)(cid:3)(cid:75)(cid:76)(cid:93)(cid:76)(cid:83)(cid:86)(cid:87)(cid:84)(cid:76)(cid:85)(cid:91)(cid:19)(cid:3)(cid:87)(cid:89)(cid:86)(cid:75)(cid:92)(cid:74)(cid:91)(cid:80)(cid:86)(cid:85)(cid:19)(cid:3)(cid:92)(cid:90)(cid:76)(cid:3)(cid:86)(cid:89)(cid:3)(cid:90)(cid:91)(cid:86)(cid:74)(cid:82)(cid:87)(cid:80)(cid:83)(cid:80)(cid:85)(cid:78)(cid:3)(cid:86)(cid:77)(cid:3)(cid:85)(cid:92)(cid:74)(cid:83)(cid:76)(cid:72)(cid:89)(cid:19)(cid:3)(cid:74)(cid:79)(cid:76)(cid:84)(cid:80)(cid:74)(cid:72)(cid:83)(cid:3)(cid:86)(cid:89)(cid:3)(cid:73)(cid:80)(cid:86)(cid:83)(cid:86)(cid:78)(cid:80)(cid:74)(cid:72)(cid:83)(cid:3)(cid:94)(cid:76)(cid:72)(cid:87)(cid:86)(cid:85)(cid:90)(cid:3)(cid:86)(cid:89)(cid:3)(cid:84)(cid:80)(cid:90)(cid:90)(cid:80)(cid:83)(cid:76)(cid:90)(cid:19)(cid:3)(cid:85)(cid:86)(cid:89)(cid:3)(cid:90)(cid:79)(cid:72)(cid:83)(cid:83)(cid:3)(cid:91)(cid:79)(cid:76)(cid:96)(cid:3)(cid:92)(cid:90)(cid:76)(cid:3) Bourns®(cid:3)(cid:87)(cid:89)(cid:86)(cid:75)(cid:92)(cid:74)(cid:91)(cid:90)(cid:3)(cid:86)(cid:89)(cid:3)(cid:91)(cid:76)(cid:74)(cid:79)(cid:85)(cid:86)(cid:83)(cid:86)(cid:78)(cid:96)(cid:3)(cid:80)(cid:85)(cid:3)(cid:72)(cid:85)(cid:96)(cid:3)(cid:77)(cid:72)(cid:74)(cid:80)(cid:83)(cid:80)(cid:91)(cid:96)(cid:3)(cid:94)(cid:79)(cid:80)(cid:74)(cid:79)(cid:3)(cid:76)(cid:85)(cid:78)(cid:72)(cid:78)(cid:76)(cid:90)(cid:3)(cid:80)(cid:85)(cid:3)(cid:72)(cid:74)(cid:91)(cid:80)(cid:93)(cid:80)(cid:91)(cid:80)(cid:76)(cid:90)(cid:3)(cid:89)(cid:76)(cid:83)(cid:72)(cid:91)(cid:80)(cid:85)(cid:78)(cid:3)(cid:91)(cid:86)(cid:3)(cid:90)(cid:92)(cid:74)(cid:79)(cid:3)(cid:75)(cid:76)(cid:93)(cid:80)(cid:74)(cid:76)(cid:90)(cid:21)(cid:3)(cid:3)(cid:59)(cid:79)(cid:76)(cid:3)(cid:77)(cid:86)(cid:89)(cid:76)(cid:78)(cid:86)(cid:80)(cid:85)(cid:78)(cid:3)(cid:89)(cid:76)(cid:90)(cid:91)(cid:89)(cid:80)(cid:74)(cid:91)(cid:80)(cid:86)(cid:85)(cid:90)(cid:3) (cid:72)(cid:87)(cid:87)(cid:83)(cid:96)(cid:3)(cid:91)(cid:86)(cid:3)(cid:72)(cid:83)(cid:83)(cid:3)(cid:92)(cid:90)(cid:76)(cid:90)(cid:3)(cid:72)(cid:85)(cid:75)(cid:3)(cid:72)(cid:87)(cid:87)(cid:83)(cid:80)(cid:74)(cid:72)(cid:91)(cid:80)(cid:86)(cid:85)(cid:90)(cid:3)(cid:91)(cid:79)(cid:72)(cid:91)(cid:3)(cid:93)(cid:80)(cid:86)(cid:83)(cid:72)(cid:91)(cid:76)(cid:3)(cid:85)(cid:72)(cid:91)(cid:80)(cid:86)(cid:85)(cid:72)(cid:83)(cid:3)(cid:86)(cid:89)(cid:3)(cid:80)(cid:85)(cid:91)(cid:76)(cid:89)(cid:85)(cid:72)(cid:91)(cid:80)(cid:86)(cid:85)(cid:72)(cid:83)(cid:3)(cid:87)(cid:89)(cid:86)(cid:79)(cid:80)(cid:73)(cid:80)(cid:91)(cid:80)(cid:86)(cid:85)(cid:90)(cid:19)(cid:3)(cid:80)(cid:85)(cid:74)(cid:83)(cid:92)(cid:75)(cid:80)(cid:85)(cid:78)(cid:3)(cid:76)(cid:84)(cid:73)(cid:72)(cid:89)(cid:78)(cid:86)(cid:90)(cid:3)(cid:86)(cid:89)(cid:3)(cid:80)(cid:85)(cid:91)(cid:76)(cid:89)(cid:85)(cid:72)(cid:91)(cid:80)(cid:86)(cid:85)(cid:72)(cid:83)(cid:3) (cid:89)(cid:76)(cid:78)(cid:92)(cid:83)(cid:72)(cid:91)(cid:80)(cid:86)(cid:85)(cid:90)(cid:21)(cid:3)(cid:3)(cid:45)(cid:92)(cid:89)(cid:91)(cid:79)(cid:76)(cid:89)(cid:19)(cid:3)(cid:41)(cid:86)(cid:92)(cid:89)(cid:85)(cid:90)® products and Bourns technology and technical data may not under any circumstance be exported or re-exported to countries subject to international sanctions or embargoes. Bourns® products may not, without 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bilingual versions are available at: Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf (cid:42)(cid:24)(cid:30)(cid:28)(cid:26)(cid:3)(cid:23)(cid:28)(cid:22)(cid:24)(cid:30)(cid:22)(cid:24)(cid:31)(cid:57)