SR12 Просмотр технического описания (PDF) - Semtech Corporation
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SR12 Datasheet PDF : 8 Pages
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PROTECTION PRODUCTS
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SR12 has been
specifically designed to protect sensitive components
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 components.
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.
SR12
RailClamp
Low Capacitance TVS Diode Array
Features
Transient protection for high speed data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 0.5kV, 12A (8/20µs)
Array of surge rated diodes with internal TVS Diode
Protects two I/O lines
Operating Voltage: 12 volts
Low capacitance (5pF typical) for high-speed
interfaces
Low clamping voltage
Solid-state silicon-avalanche technology
Mechanical Characteristics
JEDEC SOT-143 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : R12
Packaging : Tape and Reel per EIA 481
RoHS/WEEE Compliant
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
2
3
SOT-143 (Top View)
1
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