SRDA70-4_06 Datasheet, PDF (1/7 Pages) Semtech Corporation – RailClamp® Low Capacitance TVS Diode Array

PROTECTION PRODUCTS
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SRDA70-4 has
been specifically designed to protect sensitive compo-
nents which are connected to data and transmission
lines from over-voltages caused by electrostatic dis-
charge (ESD), electrical fast transients (EFT), and
lightning.
The unique design of the SRDA70-4 integrates eight
surge rated, low capacitance steering diodes in a low
profile SO-8 package. During transient conditions, the
steering diodes direct the transient to either the
positive side of the power supply line or to ground. The
SRDA70-4 may be used as a stand alone device or in
conjunction with TVS diodes for enhanced protection.
The low capacitance array configuration allows the user
to protect four high speed data or I/O lines. The low
inductance construction minimizes voltage overshoot
during high current surges.
SRDA70-4
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) 1kV, 24A (8/20µs)
‹ Array of surge rated diodes
‹ Protects four I/O lines
‹ Low capacitance for high-speed interfaces
‹ High surge capability
‹ Low forward voltage characteristics
‹ Solid-state silicon avalanche technology
Mechanical Characteristics
‹ 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
‹ RoHS/WEEE Compliant
Applications
‹ Latch-Up Protection
‹ Microcontroller Input Protection
‹ Token Ring
‹ I²C Bus Protection
‹ Video Line Protection
‹ Set Top Box I/O
‹ LAN/WAN Equipment
Circuit Diagram
Schematic and PIN Configuration
REF 1
I/O 1
I/O 2
I/O 3
I/O 4
REF 2
I/O 1 ¹
REF 1 ²
REF 1 ³
I/O 2 4
Revision 08/15/06
1
8 _{REF 2}
7 I/O 4
6 _{I/O 3}
SO-8 (Top View)
5 REF 2
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