SMDA15CN-5TB datasheet(4/6 Pages) SEMTECH

Part #	SMDA15CN-5TB

Description	Bidirectional TVS Array for Protection of Five Lines????

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PROTECTION PRODUCTS

SMDA05CN-5 THRU SMDA15CN-5

Protection for Four Bidirectional Lines

Protection for Five Bidirectional Lines

Device Connection Options for Protection of Four or

Five Data Lines

The SMDAxxCN-5 can be configured to protect either

four or five bidirectional data lines. The options for

connecting the devices are as follows:

1. Bidirectional protection of four I/O lines is achieved

by connecting pins 1, 2, 3, and 4 to the data lines.

Pins 5, 6, 7, and 8 are connected to ground. The

ground connection 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. In this

configuration, the device can withstand the maxi-

mum specified transient impulse on four lines

simultaneously.

2. Bidirectional protection of five I/O lines is achieved

by connecting pins 1, 2, 3, 4, and 5 to the data

lines. Pins 6, 7, and 8 are connected to ground.

The ground connection should be made directly to

the circuit board ground plane for best results. In

this configuration, the device can withstand the

maximum rated transient impulse on any two lines

simultaneously.

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 TVS near the input terminals or connec-

tors to restrict transient coupling.

l

Minimize the path length between the TVS 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.

From Connector

To Protected IC

From Connector

To Protected IC

Applications Information

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SMDA15CN-5TB Datasheet(PDF) 4 Page - Semtech Corporation

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