RClamp0504N RailClamp Low Capacitance TVS Diode Array  PROTECTION PRODUCTS - RailClamp Description Features RailClamps are surge rated diode arrays designed to (cid:139) ESD protection for high-speed data lines to protect high speed data interfaces. The RClamp series IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) has been specifically designed to protect sensitive IEC 61000-4-4 (EFT) 40A (5/50ns) components which are connected to data and trans- IEC 61000-4-5 (Lightning) 12A (8/20µs) mission lines from overvoltage caused by electrostatic (cid:139) Array of surge rated diodes with internal TVS Diode discharge (ESD), electrical fast transients (EFT), and (cid:139) Small package saves board space lightning. (cid:139) Protects four I/O lines The unique design of the RClamp series devices (cid:139) Low capacitance: 3pF typical incorporates eight surge rated, low capacitance steer- (cid:139) Low clamping voltage ing diodes and a TVS in a single package. During (cid:139) Low operating voltage: 5.0V transient conditions, the steering diodes direct the (cid:139) Solid-state silicon-avalanche technology transient to either the positive side of the power supply Mechanical Characteristics line or to ground. The internal TVS diode prevents over-voltage on the power line, protecting any down- (cid:139) SLP2020P6 Package stream components. (cid:139) RoHS/WEEE Compliant The RClampTM0504N has a low typical capacitance of (cid:139) Nominal Dimensions: 2.0 x 2.0 x 0.60 mm 3pF and operates with virtually no insertion loss to (cid:139) Lead Pitch: 0.65mm 1GHz. This makes the device ideal for protection of (cid:139) Lead Finish: NiPdAu high-speed data lines such as USB 2.0, Firewire, DVI, (cid:139) Marking : Marking Code and Date Code and gigabit Ethernet interfaces. (cid:139) Packaging : Tape and Reel The RClamp0504N is in a 6-pin, RoHS compliant, SLP2020P6 package. It measures 2.0 x 2.0 x Applications 0.60mm. The leads are spaced at a pitch of 0.5mm (cid:139) USB 2.0 Power and Data Line Protection and are finished with lead-free NiPdAu. Each device may be used to protect four high-speed data or trans- (cid:139) Video Graphics Cards mission lines. They may be used to meet the ESD (cid:139) Monitors and Flat Panel Displays immunity requirements of IEC 61000-4-2, Level 4 (cid:139) Digital Video Interface (DVI) (±15kV air, ±8kV contact discharge). (cid:139) 10/100/1000 Ethernet (cid:139) Notebook Computers Circuit Diagram Package Dimensions 2.00 1 Pin 5 2.00 Pin 1 Pin 3 Pin 4 Pin 6 0.65 BSC Pin 2 0.60 Device Schematic 6 Pin SLP package (Bottom Side View) Nominal Dimensions in mm Revision 01/16/2008 1 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Absolute Maximum Rating Rating Symbol Value Units PeakPulsePower(tp =8/20µs) P 300 Watts pk PeakPulseCurrent (tp =8/20µs) I 12 A PP ESDperIEC61000-4-2(Air) V 15 kV ESD ESDperIEC61000-4-2(Contact) 8 Operating Temperature T -55to+125 °C J StorageTemperature T -55to+150 °C STG Electrical Characteristics (T = 25oC) RClamp0504N Parameter Symbol Conditions Minimum Typical Maximum Units ReverseStand-Off Voltage V Pin 5to2 5 V RWM ReverseBreakdown Voltage V I =1mA 6 V BR t Pin 5to2 ReverseLeakageCurrent I V =5V, T=25°C 5 µA R RWM Pin 5to2 Forward Voltage V I =15mA 1.2 V F f Clamping Voltage V I =1A, tp =8/20µs 12.5 V C PP Any I/Opin toGround Clamping Voltage V I =5A, tp =8/20µs 17.5 V C PP Any I/Opin toGround Junction Capacitance C V =0V, f =1MHz 3 5 pF j R Any I/Opin toGround V =0V, f =1MHz 1.5 pF R Between I/Opins  2008 Semtech Corp. 2 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 100 W) 90 P (kPk 1 or IPP 80 er - wer 70 w o 60 o P ulse P 0.1 Rated 4500 ak P % of 30 e P 20 10 0.01 0 0.1 1 10 100 1000 0 25 50 75 100 125 150 Pulse Duration - tp (µs) Ambient Temperature - TA (oC) Pulse Waveform Clamping Voltage vs. Peak Pulse Current 110 25 Waveform 100 Parameters: 90 tr = 8µs 20 80 td = 20µs V) Percent of IPP 45670000 e-t td = IPP/2 mping Voltage - V (C 1105 30 a Waveform Cl 5 Parameters: 20 tr = 8µs 10 td = 20µs 0 0 0 2 4 6 8 10 12 14 0 5 10 15 20 25 30 Peak Pulse Current - IPP (A) Time (µs) Forward Voltage vs. Forward Current Normalized Capacitance vs. Reverse Voltage 4 1.5 1.4 3.5 1.3 Line-Line 1.2 V) 3 1.1 (F 1 orward Voltage - V 12..525 C(V) / C(V=0)JRJR 000000......456789 Line-Gnd F 1 Waveform 0.3 Parameters: 0.2 0.5 tr = 8µs 0.1 f = 1MHz td = 20µs 0 0 0 1 2 3 4 5 0 2 4 6 8 10 12 14 Forward Current - IF (A) Reverse Voltage - VR (V)  2008 Semtech Corp. 3 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Applications Information Device Connection Options for Protection of Four ESD Protection With RailClamps High-Speed Data Lines RailClamps are optimized for ESD protection using the This device is designed to protect four data lines from rail-to-rail topology. Along with good board layout, transient over-voltages by clamping them to a fixed these devices virtually eliminate the disadvantages of reference. When the voltage on the protected line using discrete components to implement this topology. exceeds the reference voltage (plus diode V ) the Consider the situation shown in Figure 1 where dis- F steering diodes are forward biased, conducting the crete diodes or diode arrays are configured for rail-to- transient current away from the sensitive circuitry. rail protection on a high speed line. During positive Data lines are connected at pins 1, 3, 4 and 6. The duration ESD events, the top diode will be forward negative reference is connected at pin 2. This pin biased when the voltage on the protected line exceeds should be connected directly to a ground plane on the the reference voltage plus the V drop of the diode. F board for best results. The path length is kept as short For negative events, the bottom diode will be biased as possible to minimize parasitic inductance. when the voltage exceeds the V of the diode. At first F The positive reference is connected at pin 5. The approximation, the clamping voltage due to the charac- options for connecting the positive reference are as teristics of the protection diodes is given by: follows: V = V + V (for positive duration pulses) C CC F 1. To protect data lines and the power line, connect V = -V (for negative duration pulses) C F pin 5 directly to the positive supply rail (V ). In this CC configuration the data lines are referenced to the supply voltage. The internal TVS diode prevents over-voltage on the supply rail. In 1 1 In 4 Vcc In 2 In 3 FFFFFiiiiiggggguuuuurrrrreeeee 11111 ----- “““““RRRRRaaaaaiiiiilllll-----TTTTTooooo-----RRRRRaaaaaiiiiilllll””””” PPPPPrrrrrooooottttteeeeeccccctttttiiiiiooooonnnnn TTTTTooooopppppooooolllllooooogggggyyyyy 2. In applications where the supply rail does not exit (((((FFFFFiiiiirrrrrsssssttttt AAAAApppppppppprrrrroooooxxxxxiiiiimmmmmaaaaatttttiiiiiooooonnnnn))))) the system, the internal TVS may be used as the reference. In this case, pin 5 is not connected. The steering diodes will begin to conduct when the voltage on the protected line exceeds the working However, for fast rise time transient events, the voltage of the TVS (plus one diode drop).3. effects of parasitic inductance must also be consid- ered as shown in Figure 2. Therefore, the actual clamping voltage seen by the protected circuit will be: In 1 1 In 4 V = V + V + L di /dt (for positive duration pulses) C CC F P ESD V = -V - L di /dt (for negative duration pulses) C F G ESD NC ESD current reaches a peak amplitude of 30A in 1ns In 2 In 3 for a level 4 ESD contact discharge per IEC 61000-4-2.  2008 Semtech Corp. 4 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Applications Information (continued) PIN Descriptions FFFFFiiiiiggggguuuuurrrrreeeee 22222 ----- TTTTThhhhheeeee EEEEEffffffffffeeeeeccccctttttsssss ooooofffff PPPPPaaaaarrrrraaaaasssssiiiiitttttiiiiiccccc IIIIInnnnnddddduuuuuccccctttttaaaaannnnnccccceeeee FFFFFiiiiiggggguuuuurrrrreeeee 33333 ----- RRRRRaaaaaiiiiilllll-----TTTTTooooo-----RRRRRaaaaaiiiiilllll PPPPPrrrrrooooottttteeeeeccccctttttiiiiiooooonnnnn UUUUUsssssiiiiinnnnnggggg WWWWWhhhhheeeeennnnn UUUUUsssssiiiiinnnnnggggg DDDDDiiiiissssscccccrrrrreeeeettttteeeee CCCCCooooommmmmpppppooooonnnnneeeeennnnntttttsssss tttttooooo IIIIImmmmmpppppllllleeeeemmmmmeeeeennnnnttttt RRRRRaaaaaiiiiilllllCCCCClllllaaaaammmmmppppp TTTTTVVVVVSSSSS AAAAArrrrrrrrrraaaaayyyyysssss RRRRRaaaaaiiiiilllll-----TTTTTooooo-----RRRRRaaaaaiiiiilllll PPPPPrrrrrooooottttteeeeeccccctttttiiiiiooooonnnnn Therefore, the voltage overshoot due to 1nH of series ETHERNET PROTECTION inductance is: Ethernet ICs are vulnerable to damage from electro- V = L di /dt = 1X10-9 (30 / 1X10-9) = 30V static discharge (ESD), lightning, and cable discharge P ESD events (CDE). The internal protection in the PHY chip, Example: if any, often is not enough due to the high energy of Consider a V = 5V, a typical V of 30V (at 30A) for the these disturbances. The fatal discharge can occur CC F steering diode and a series trace inductance of 10nH. differentially across the transmit or receive line pair or The clamping voltage seen by the protected IC for a between any line and ground (common mode). positive 8kV (30A) ESD pulse will be: Common mode and differential mode protection V = 5V + 30V + (10nH X 30V/nH) = 335V against ESD and CDE discharges can be achieved by C connecting the RClamp0504N on the PHY side of the This does not take into account that the ESD current is Ethernet circuit as shown in Figure 4. Pins 1, 3, 4, and directed into the supply rail, potentially damaging any 6 are connected to the transmit and receive line pairs. components that are attached to that rail. Also note Since there is no Vcc connection at the connector, pin that it is not uncommon for the V of discrete diodes to 5 of the RClamp0504N should not be connected. Pin F exceed the damage threshold of the protected IC. This 2 is connected to ground. This connection should be is due to the relatively small junction area of typical made directly to the ground plane. All path lengths discrete components. It is also possible that the should be kept as short as possible to minimize para- power dissipation capability of the discrete diode will sitic inductance. This configuration can be used to be exceeded, thus destroying the device. meet the ESD immunity requirements of IEC 61000-4- 2 and cable discharge events. The RailClamp is designed to overcome the inherent disadvantages of using discrete signal diodes for ESD suppression. The RailClamp’s integrated TVS diode helps to mitigate the effects of parasitic inductance in the power supply connection. During an ESD event, the current will be directed through the integrated TVS diode to ground. The maximum voltage seen by the protected IC due to this path will be the clamping voltage of the device.  2008 Semtech Corp. 5 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Applications Information (continued) RClamp0504N RClamp0504N Figure 4 - 10/100/1000 Ethernet Protection to IEC 61000-4-2  2008 Semtech Corp. 6 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Applications Information - Spice Model RClamp0504N Spice Model RClamp0504NSpice Parameters Parameter Unit D1(LCRD) D2(LCRD) D3(TVS) IS Amp 1E-20 1E-20 8.57E-14 BV Volt 180 20 8 VJ Volt 0.63 0.59 0.66 RS Ohm 0.195 0.357 0.512 IBV Amp 1E-3 1E-3 1E-3 CJO Farad 2E-12 2E-12 277E-12 TT sec 2.541E-9 2.541E-9 2.541E-9 M -- 0.01 0.01 0.231 N -- 1.1 1.1 1.1 EG eV 1.11 1.11 1.11  2008 Semtech Corp. 7 www.semtech.com

RClamp0504N PROTECTION PRODUCTS OOuuttlliinnee DDrraawwiinngg --S SLOP-28020P6 B DIMENSIONS A E C INCHES MILLIMETERS DIM 1 2 MINNOMMAX MINNOMMAX A .020 .024 .026 0.50 0.60 0.65 E/2 A1 .000 .001 .002 0.00 0.03 0.05 PIN 1 E D LxN A2 (.007) (0.17) INDICATOR b .007 .010 .012 0.20 0.25 0.30 (LASER MARK) C .055 .061 .065 1.40 1.55 1.65 D .028 .034 .038 0.71 0.86 0.96 A2 N E .074 .079 .083 1.90 2.00 2.10 e e .025 BSC 0.65 BSC A SEATING bxN L .011 .014 .016 0.30 0.35 0.40 aaa c PLANE E/2 bbb C A B aNaa .0603 0.608 A1 C bbb .003 0.08 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. Land Pattern -SLP2020P6 X P DIMENSIONS DIM INCHES MILLIMETERS B .065 1.65 C (.075) (1.90) Z G F (C) F .034 0.86 G .049 1.25 P .026 0.65 X .014 0.35 Y .026 0.65 Y Z .100 2.55 B NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET.  2008 Semtech Corp. 8 www.semtech.com

RClamp0504N PROTECTION PRODUCTS Marking Codes Ordering Information Working Qtyper Reel Part Number Voltage Reel Size 0504N YYWW RClamp0504N.TCT 5V 3,000 7Inch PIN 1 INDICATOR Notes: 1) This is a lead-free, RoHs compliant product RailClamp and RClamp are marks of Semtech Corporation YYWW = Date Code (YY = Year, WW = Work Week) Tape and Reel Specification Pin 1 Location User Direction of feed Device Orientation in Tape A0 B0 K0 2.25+/-0.10mm 2.25+/-0.10mm 0.75+/-0.10mm Tape K B,(Max) D D1 E F P P0 P2 T(MAX) W Width (MAX) 1.5+0.1mm 1.750±.10 4.0±0.1 4.0±0.1 8.0mm 0.8mm 3.5±0.05 2.0±0.05m- 4.2mm -0.0mm mm 2.4mm mm mm 0.4mm +0.3mm 8mm ±0.05 mm m (.165) (0.59+.005 (.069±.004) (.094) (.157±.00- (.157±.00- (.016) -0.1mm (.031) (.138±.002) (.079±.002) -.000) 4) 4) (.312±.012) Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804  2008 Semtech Corp. 9 www.semtech.com