SRDA05-4 and SRDA12-4 RailClamp Low Capacitance TVS Diode Array PROTECTION PRODUCTS PROTECTION PRODUCTS - RailClamp Features Description RailClamps are surge rated diode arrays designed to Transient protection for high-speed data lines to protect high speed data interfaces. The SRDA 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) 24A (8/20 s) mission lines from overvoltage caused by electrostatic Array of surge rated diodes with internal TVS diode discharge (ESD), electrical fast transients (EFT), and Protects four I/O lines lightning. Low capacitance (<15pF) for high-speed interfaces The unique design incorporates surge rated, low Low operating and clamping voltages capacitance steering diodes and a TVS diode in a Solid-state technology single package. During transient conditions, the steering diodes direct the transient current to ground Mechanical Characteristics via the internal low voltage TVS. The TVS diode clamps JEDEC SOIC-8 package the transient voltage to a safe level. The low capaci- Lead Finish: SnPb or Matte Sn tance array configuration allows the user to protect up Molding compound flammability rating: UL 94V-0 to four high-speed data lines. The SRDA05-4 may be used to protect lines operating up to 5 volts while the Marking : Part number, date code, logo SRDA12-4 may be used on lines operating up to 12 Packaging : Tape and Reel per EIA 481 volts. Applications These devices are in a 8-pin SOIC package. They are available with a SnPb or RoHS/WEEE compliant matte USB Power and Data Line Protection tin lead finish. The high surge capability (Ipp=25A, T1/E1 secondary IC Side Protection tp=8/20 s) means it can be used in high threat T3/E3 secondary IC Side Protection environments in applications such as CO/CPE equip- HDSL, SDSL secondary IC Side Protection ment, telecommunication lines, and video lines. Video Line Protection Microcontroller Input Protection Base stations 2 I C Bus Protection Circuit Diagram Schematic and PIN Configuration I/O 1 REF1 1 8 REF 2 REF 1 2 7 I/O 4 I/O 1 I/O 2 I/O 3 I/O 4 I/O 3 3 6 REF 1 REF2 REF 2 45 I/O 2 S0-8 (Top View) www.semtech.com Revision 8/21/07 1SRDA05-4 and SRDA12-4 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 = 1A, t=V8/20s) 1V.5 F p FP LTead Soldering Temperature 2C60 (10 sec.) L OTperating Temperature -C55 to +125 J STtorage Temperature -C55 to +150 STG o Electrical Characteristics (T=25 C) SRDA05-4 Plarameter SsymboCmondition MlinimuTmypicaMsaximu Unit RVeverse Stand-Off Voltage 5V RWM RVeverse Breakdown Voltage I=61mA V BR t RIeverse Leakage Current V=05V, T=25C 1A R RWM CVlamping Voltage I = 1A, t=88/20s 9V. C PP p CVlamping Voltage I = 10A, t=28/20s 1V C PP p CVlamping Voltage I = 25A, t=08/20s 2V C PP p 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 www.semtech.com 2007 Semtech Corp. 2