SR12
SR12 is Low Capacitance TVS Diode Array manufactured by SEMTECH.
PROTECTION PRODUCTS
Description
Rail Clamps are surge rated diode arrays designed to protect high speed data interfaces. The SR12 has been specifically designed to protect sensitive ponents which are connected to data and transmission lines from overvoltages caused by ESD (electrostatic discharge), EFT (electrical fast transients), and lightning.
The unique design of the SR12 incorporates four surge rated, low capacitance steering diodes and a TVS diode in a single package. During transient conditions, the steering diodes direct the transient to either the positive side of the power supply line or to ground. The internal TVS diode prevents over-voltage on the power line, protecting any downstream ponents.
The low capacitance array configuration allows the user to protect two high-speed data or transmission lines. The low inductance construction minimizes voltage overshoot during high current surges.
Rail Clamp Low Capacitance TVS Diode Array
Features
Transient protection for high speed data lines to IEC 61000-4-2 (ESD) ±15k V (air), ±8k V (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 0.5k V, 12A (8/20µs)
Array of surge rated diodes with internal TVS Diode Protects two I/O lines Operating Voltage: 12 volts Low capacitance (5p F typical) for high-speed interfaces Low clamping voltage Solid-state silicon-avalanche technology
Mechanical Characteristics
JEDEC SOT-143 package UL 497B listed Molding pound flammability rating: UL 94V-0 Marking : R12 Packaging : Tape and Reel per EIA 481 Ro HS/WEEE pliant
Applications
ADSL Industrial Electronics RS-422 Interfaces Portable Electronics Microcontroller Input Protection WAN/LAN Equipment
Circuit Diagram
Pin 4
Pin 2
Pin 3
Schematic & PIN Configuration
4 1
Revision 04/11/05
Pin 1
SOT-143 (Top View)
1 .semtech.
PROTECTION PRODUCTS...
