SRDA3.3-4.TBT

SRDA3.3-4 RailClamp® Low Capacitance TVS Array PROTECTION PRODUCTS Description Features RailClamp® TVS arrays are low capacitance ESD protection devices designed to protect sensitive components from overvoltage caused by electrostatic discharge (ESD), electrical fast transients (EFT), and lightning surge. They offers desirable characteristics for board level protection including fast response time, low operating and clamping voltage, and no device degradation. • Transient protection for high-speed data lines to The unique design incorporates surge rated, low capacitance steering diodes and a TVS diode in a single package. During transient conditions, the steering diodes direct the transient current to ground via the internal low voltage TVS. The TVS diode clamps the transient voltage to a safe level. The low capacitance array configuration allows the user to protect up to four data lines. The SRDA3.3-4 is constructed using Semtech’s proprietary EPD process technology. The EPD process provides low stand-off voltages with significant reductions in leakage current and capacitance over silicon avalanche diode processes. They feature a true operating voltage of 3.3 volts for superior protection. These devices are in a 8-pin SOIC package. It measures 3.9 x 4.9mm. The high surge capability (IPP=25A, tp=8/20μs) means it can be used in high threat environments in applications such as CO/CPE equipment, telecommunication lines, and video lines. Circuit Diagram • • • • • • ŒŒ ŒŒ ŒŒ IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 25A (8/20μs) Array of surge rated diodes with internal TVS diode Protects four I/O lines Low capacitance (