SRDA3.3-4 Datasheet, PDF (1/10 Pages) Semtech Corporation – RailClamp® Low Capacitance TVS Array

PROTECTION PRODUCTS
Description
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 ESD (electrostatic
discharge), EFT (electrical fast transients), and light-
ning.
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 two high-speed data or transmission lines.
The low inductance construction minimizes voltage
overshoot during high current surges.
SRDA3.3-4 THRU SRDA12-4
RailClamp^Ò
Low Capacitance TVS Diode Array
Features
u 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 (8/20µs)
u Array of surge rated diodes with internal TVS diode
u Protects four I/O lines & power supply line
u Low capacitance (<15pF) for high-speed interfaces
u Low operating & clamping voltages
u Solid-state technology
Mechanical Characteristics
u JEDEC SO-8 package
u UL 497B listed
u Molding compound flammability rating: UL 94V-0
u Marking : Part number, date code, logo
u Packaging : Tube or Tape and Reel per EIA 481
Applications
u USB Power & Data Line Protection
u T1/E1 secondary IC Side Protection
u T3/E3 secondary IC Side Protection
u HDSL, IDSL secondary IC Side Protection
u Video Line Protection
u Microcontroller Input Protection
u Base stations
u I²C Bus Protection
Circuit Diagram
Schematic & PIN Configuration
REF1
I/O 1
I/O 2
I/O 3
I/O 4
REF2
I/O ₁
REF 1 ₂
REF 1 3
I/O ₄
Revision 9/2000
1
8 ^{REF 2}
7 ^I/O
6 I/O
S0-8 (Top View)
5 REF 2
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