SLVU2.8-8.TB Ver la hoja de datos (PDF) - Semtech Corporation

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SLVU2.8-8.TB

EPD TVS Diode Array For ESD and Latch-Up Protection

Semtech Corporation 

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

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