PROTECTION PRODUCTS
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PROTECTION PRODUCTS
SRDA3.3-6 and SRDA05-6
RailClamp
Low Capacitance TVS Diode Array
Description
Features
Circuit Diagram
Schematic and PIN Configuration
Revision 04/11/05
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SR series has
been specifically designed to protect sensitive compo-
nents which are connected to data and transmission
lines from overvoltage caused by electrostatic dis-
charge (ESD), electrical fast transients (EFT), and
lightning.
The unique design of the SRDA series devices incorpo-
rates 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 compo-
nents.
The low capacitance array configuration allows the user
to protect six high-speed data or transmission lines.
The low inductance construction minimizes voltage
overshoot during high current surges.
Applications
Mechanical Characteristics
USB Power & Data Line Protection
T1/E1 secondary IC Side Protection
Token Ring
HDSL, SDSL secondary IC Side Protection
Video Line Protection
Microcontroller Input Protection
Base stations
I2C Bus Protection
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) 24A (8/20s)
Array of surge rated diodes with internal TVS diode
Protects six I/O lines and power supply line
Low capacitance (<15pF) for high-speed interfaces
Low operating & clamping voltages
Solid-state technology
JEDEC SO-8 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : Part number, date code, logo
Packaging : Tube or Tape and Reel per EIA 481
S0-8 (Top View)
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
+VREF
GND
1
2
3
4
5
6
7
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