SRDA70-4 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 SRDA70-4 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) 1kV, 24A (8/20s) lines from over-voltages caused by electrostatic dis- Array of surge rated diodes charge (ESD), electrical fast transients (EFT), and Protects four I/O lines lightning. Low capacitance for high-speed interfaces The unique design of the SRDA70-4 integrates eight High surge capability surge rated, low capacitance steering diodes in a low Low forward voltage characteristics profile SO-8 package. During transient conditions, the Solid-state silicon avalanche technology steering diodes direct the transient to either the positive side of the power supply line or to ground. The Mechanical Characteristics SRDA70-4 may be used as a stand alone device or in JEDEC SO-8 package conjunction with TVS diodes for enhanced protection. UL 497B listed The low capacitance array configuration allows the user Molding compound flammability rating: UL 94V-0 to protect four high speed data or I/O lines. The low Marking : Part number, date code, logo inductance construction minimizes voltage overshoot Packaging : Tube or Tape and Reel per EIA 481 during high current surges. RoHS/WEEE Compliant Applications Latch-Up Protection Microcontroller Input Protection Token Ring 2 I C Bus Protection Video Line Protection Set Top Box I/O LAN/WAN Equipment Circuit Diagram Schematic and PIN Configuration REF 1 1 8 I/O 1 REF 2 2 7 I/O 4 REF 1 I/O 1 I/O 2 I/O 3 I/O 4 3 6 REF 1 I/O 3 REF 2 I/O 245 REF 2 SO-8 (Top View) www.semtech.com Revision 08/15/06 1SRDA70-4 PROTECTION PRODUCTS PROTECTION PRODUCTS Absolute Maximum Rating Rlating Seymbo Vsalu Unit PIeak Pulse Current (tp = 8/20s) 2A4 PP RVectifier Repetitive Peak Reverse Voltage 7V0 RRM Thermal Resistance, Junction to Ambient 1W63 C / JA Thermal Resistance, Junction to Case 3W8.8 C / JC LTead Soldering Temperature 2C60 (10 sec.) L OTperating Temperature -C55 to +125 J STtorage Temperature -C55 to +150 STG Electrical Characteristics SRDA70-4 Plarameter SsymboCmondition MlinimuTmypicaMsaximu Unit Rectifier Repetitive Peak reverse V 7V0 RRM Voltage RVeverse Breakdown Voltage I=550A8V BR t RIeverse Leakage Current V=570V, T=25C A R RWM FVorward Voltage I = 1A, t=38/20s 1V. F PP p FVorward Voltage I = 10A, t=38/20s 3V. F PP p JCunction Capacitance Between I/O pins and 1F5 p j Ground V = 0V, f = 1MHz R Between I/O pins 4Fp V = 0V, f = 1MHz R www.semtech.com 2006 Semtech Corp. 2
