SMS05TG 데이터 시트보기 (PDF) - Semtech Corporation
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SMS05TG Datasheet PDF : 7 Pages
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PROTECTION PRODUCTS
Applications Information
Device Connection for Protection of Four Data Lines
The SMSxx is designed to protect up to four unidirec-
tional data lines. The device is connected as follows:
1. Unidirectional protection of four I/O lines is
achieved by connecting pins 1, 3, 4 and 6 to the
data lines. Pin 2 and 5 are connected to ground.
The ground connections should be made directly to
the ground plane for best results. The path length
is kept as short as possible to reduce the effects
of parasitic inductance in the board traces.
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:
l Place the SMSxx near the input terminals or con-
nectors to restrict transient coupling.
l Minimize the path length between the SMSxx and
the protected line.
l Minimize all conductive loops including power and
ground loops.
l The ESD transient return path to ground should be
kept as short as possible.
l Never run critical signals near board edges.
l Use ground planes whenever possible.
SMS05 THRU SMS24
SMSxx Circuit Diagram
Protection of Four Unidirectional Lines
ã 2000 Semtech Corp.
5
www.semtech.com
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