SLVU2.8-8 Datasheet, PDF (4/9 Pages) Protek Devices – ULTRA LOW CAPACITANCE TVS ARRAY

PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Eight Data Lines
Electronic equipment is susceptible to transient distur-
bances from a variety of sources including: ESD to an
open connector or interface, direct or nearby lightning
strikes to cables and wires, and charged cables “hot
plugged” into I/O ports. The SLVU2.8-8 is designed to
protect sensitive components from damage and latch-
up which may result from such transient events. The
SLVU2.8-8 can be configured to protect four high-
speed line pairs differentially, or four lines to ground
(common mode). The device is connected as follows:
1 . Differential Protection of four line pairs:
Line pairs are connected at pins 1 and 2, 3 and 4,
5 and 6, and 7 and 8.
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
z Place the device near the input terminals or con-
nectors to restrict transient coupling.
z Minimize the path length between the TVS and the
protected line.
z Minimize all conductive loops including power and
ground loops.
z The ESD transient return path to ground should be
kept as short as possible.
z Never run critical signals near board edges.
z Use ground planes whenever possible.
SLVU2.8-8
SLVU2.8-8 Circuit Diagram
Differential Protection of Four Line Pairs
From Connector
1
8
2
7
3
6
4
5
 2008 Semtech Corp.
4
www.semtech.com