SRDA3.3-6 and SRDA05-6 RailClamp Low Capacitance TVS Diode Array PROTECTION PRODUCTSPROTECTION PRODUCTS Features Description RailClamps are surge rated diode arrays designed to Transient protection for high-speed data lines to protect high speed data interfaces. The SR series has IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) been specifically designed to protect sensitive compo- IEC 61000-4-4 (EFT) 40A (5/50ns) nents which are connected to data and transmission IEC 61000-4-5 (Lightning) 24A (8/20s) lines from overvoltage caused by electrostatic dis- Array of surge rated diodes with internal TVS diode charge (ESD), electrical fast transients (EFT), and Protects six I/O lines and power supply line lightning. Low capacitance (<15pF) for high-speed interfaces The unique design of the SRDA series devices incorpo- Low operating & clamping voltages rates surge rated, low capacitance steering diodes and Solid-state technology a TVS diode in a single package. During transient conditions, the steering diodes direct the transient to Mechanical Characteristics either the positive side of the power supply line or to JEDEC SO-8 package ground. The internal TVS diode prevents over-voltage UL 497B listed on the power line, protecting any downstream compo- Molding compound flammability rating: UL 94V-0 nents. Marking : Part number, date code, logo The low capacitance array configuration allows the user Packaging : Tube or Tape and Reel to protect six high-speed data or transmission lines. The low inductance construction minimizes voltage Applications overshoot during high current surges. USB Power & Data Line Protection T1/E1 secondary IC Side Protection Token Ring HDSL, SDSL secondary IC Side Protection Video Line Protection Microcontroller Input Protection Base stations 2 I C Bus Protection Circuit Diagram Schematic and PIN Configuration 1 8 I/O 1 GND 2 7 I/O 6 I/O 2 I/O 5 +VREF 3 6 I/O 3 4 5 I/O 4 S0-8 (Top View) www.semtech.com Revision 01/15/08 1SRDA3.3-6 and SRDA05-6 PROTECTION PRODUCTS PROTECTION PRODUCTS Absolute Maximum Rating Rlating Seymbo Vsalu Unit Peak Pulse Power (t=P8/20s) 5s00 Watt p pk Peak Forward Voltage (I=V1A, tp=8/20s) 1V.5 F FP LTead Soldering Temperature 2C60 (10 sec.) L OTperating Temperature -C55 to +125 J STtorage Temperature -C55 to +150 STG Electrical Characteristics SRDA3.3-6 Plarameter SsymboCmondition MlinimuTmypicaMsaximu Unit RVeverse Stand-Off Voltage 3V.3 RWM PVunch-Through Voltage I=52A3V. PT PT SVnap-Back Voltage I=850mA2V. SB SB RIeverse Leakage Current V=13.3V, T=25C A R RWM CVlamping Voltage I=31A, tp = 8/20s 5V. C PP CVlamping Voltage I=010A, tp = 8/20s 1V C PP CVlamping Voltage I=525A, tp = 8/20s 1V C PP PIeak Pulse Current t=58/20s 2A PP p JCunction Capacitance Between I/O pins and 851Fp j Ground V = 0V, f = 1MHz R Between I/O pins 4Fp V = 0V, f = 1MHz R Note: (1) The SRDA3.3-6 is constructed using Semtechs propri- etary EPD process technology. See applications section for more information. www.semtech.com 2008 Semtech Corp. 2