參數(shù)資料
型號: SMS3.3.TG
元件分類: TVS二極管 - 瞬態(tài)電壓抑制
英文描述: 200 W, UNIDIRECTIONAL, 4 ELEMENT, SILICON, TVS DIODE
封裝: PLASTIC PACKAGE-6
文件頁數(shù): 4/7頁
文件大小: 89K
代理商: SMS3.3.TG
4
2003 Semtech Corp.
www.semtech.com
PROTECTION PRODUCTS
SMS3.3
SMS3.3 Circuit Diagram
Protection of Four Unidirectional Lines
Device Connection for Protection of Four Data Lines
The SMS3.3 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:
Place the TVS near the input terminals or connec-
tors to restrict transient coupling.
Minimize the path length between the TVS and the
protected line.
Minimize all conductive loops including power and
ground loops.
The ESD transient return path to ground should be
kept as short as possible.
Never run critical signals near board edges.
Use ground planes whenever possible.
Applications Information
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