DA108S1 DA112S1 Diode array Features ■ Array of 8 or 12 diodes ■ Low input capacitance ■ Suitable for digital line protection Complies with following standards: ■ IEC 61000-4-2 Level 4 SO-8 – 15kV (air discharge) – 8kV (contact discharge) Figure 1. Functional diagram: DA108S1 Applications ■ Protection of logic side of ISDN S-interface I/O1 REF1 ■ Protection of I/O lines of microcontroller ■ Signal conditioning I/O2 REF2 Description I/O3 REF3 Array of 8 or 12 diodes configured by cells of 2 diodes, each cell being used to protect signal line I/O4 REF4 from transient overvoltages by clamping action. As maximum voltage of each diode is 18 V, maximum input voltage range between two I/Os is Figure 2. Functional diagram: DA112S1 either 0 V to 18 V (REF1 = 0 V and REF2 = +18V) or -9 V to +9 V (REF1 = -9 V and REF2 = +9 V) I/O1 1 8 REF1 I/O2 2 7 I/O6 I/O3 3 6 REF2 I/O4 4 5 I/O5 January 2008 Rev 6 1/8 www.st.com

Characteristics DA108S1 / DA112S1 1 Characteristics Table 1. A bsolute maximum ratings (T = 25 °C) amb Symbol Parameter Value Unit V Repetitive peak reverse voltage (for one single diode) 18 V RRM I Repetitive peak forward current (1) t = 8/20 µs 12 A PP p P Power dissipation 0.73 W T Storage temperature range -55 to +150 °C stg T Operating junction temperature range -55 to +150 °C j T Maximum lead temperature for soldering during 10 s. 260 °C L 1. The surge is repeated after the device returns to ambient temperature Table 2. T hermal resistance Symbol Parameter Value Unit R Junction to ambient 170 °C/W th (j-a) Table 3. E l 1e. ctrical characteristics(T = 25 °C) amb Symbol Parameter Max. Unit I = 12 A, DA108S1 9 V Peak forward voltage PP V FP tp = 8/20 µs DA112S1 12 V Forward voltage I = 50 mA 1.2 V F F I Reverse leakage current V = 15 V 2 µA R R 2/8

DA108S1 / DA112S1 Characteristics Figure 3. Input capacitance V connected between REF1 and REF2 InCpCut applied : 36 C (pF) Typical values DC bias + 950 mV at 1 MHZ (RMS) 34 V = 5V CC 32 V = 15V CC REF2 30 28 I/O 26 V CC 24 G 22 REF1 0 2 4 6 8 10 12 14 16 DC bias (V) Figure 4. Typical peak forward voltage characteristics (8/20 µs pulse) V(V) V(V) 2.0 F Typicalvalues 10.0 F Typicalvalues 1.8 Tj=25oC 9.0 Tj=25oC 1.6 8.0 1.4 7.0 1.2 6.0 1.0 5.0 0.8 4.0 0.6 3.0 0.4 2.0 0.2 1.0 0.0 0.0 0.001 0.01 0.1 1 1 10 20 I(A) I(A) F F 3/8

Characteristics DA108S1 / DA112S1 Figure 5. Application 1: ISDN interface protection, residual lightning surges at transformer secondary are suppressed by DA108S1 Vcc LOGICSIDE LINESIDE A GND Vcc TPIxx Vss B Vcc Vss A GND Vcc TPIxx Vss B Vss DA1xxS1 Figure 6. Application 2: microcontroller I/O port protection Vcc Vcc 4-6 bit input port I/O Vcc I/O Vcc μc I/O Vcc I/O DA1xxS1 Note: IMPORTANT : DA108S1 must be connected to the reference voltages through REF1 and REF2. 4/8

DA108S1 / DA112S1 Ordering information scheme 2 Ordering information scheme Figure 7. Ordering information scheme DA 1 08 S 1 RL Diode Array Version Number of diodes 08 = 12 12 = 12 Serial Package 1 = SO-8 Packaging RL =Tape and reel Blank =Tube 5/8

Package mechanical data DA108S1 / DA112S1 3 Package mechanical data ● Epoxy meets UL94, V0 In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at www.st.com. T able 4. SO-8 dimensions Dimensions ccc C Ref. Millimeters Inches A2 A Min. Typ. Max. Min. Typ. Max. b e A1 A 1.75 0.069 A1 0.1 0.25 0.004 0.010 C h x 45° (Seating A2 1.25 0.049 0.25mm Plane) (Gage Plane) b 0.28 0.48 0.011 0.019 C L C 0.17 0.23 0.007 0.009 k D 4.80 4.90 5.00 0.189 0.193 0.197 L1 E 5.80 6.00 6.20 0.228 0.236 0.244 D E1 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.050 h 0.25 0.50 0.010 0.020 8 5 L 0.40 1.27 0.016 0.050 E1 E L1 1.04 0.041 1 4 k° 0 8 0 8 ccc 0.10 0.004 Figure 8. SO-8 footprint dimensions in mm (inches) 6.8 (0.268) 0.6 (0.024) 4.2 (0.165) 1.27 (0.050) 6/8

DA108S1 / DA112S1 Ordering information 4 Ordering information Figure 9. Ordering information Order codes Marking Package Weight Base qty Delivery mode DA108S1 100 Tube DA108S DA108S1RL 2500 Tape and reel(1) SO-8 0.11 g DA112S1 100 Tube DA112S DA112S1RL 2500 Tape and reel(1) 1. Prefered packaging is tape and reel 5 Revision history Figure 10. Revision history Date Revision Changes Aug-2001 4 Previous release. Reformatted to current standard. 15-Feb-2007 5 Standard typing error corrected. Reformatted to current standards. Added paragraph on maximum input voltage range to Description. Parameters updated in Table 1. 15-Jan-2008 6 Added Pin 1 marker to package illustration. Added Figure8: SO-8 footprint dimensions in mm (inches). 7/8

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