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PROTECTION PRODUCTS

PROTECTION PRODUCTS

SLVDA2.8

I/O Line Protection

Typical Connection

Device Connection for Protection of Four Data Lines

The SLVDA series devices are designed to protect up to

four data lines. The devices are connected as follows:

l

Common mode protection of four data lines is

achieved by connecting data lines at pins 1 - 4.

Pins 5 - 8 are connected to ground (Device is

symmetrical so connections may be reversed to

serve a specific application). The ground connec-

tions 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.

l

Protecting 5V lines: The designer may take advan-

tage of the superior reverse leakage and capaci-

tance characteristics of the SLVDA2.8 to protect

two 5V lines. This is achieved by connecting two

lines of the device in series as shown. The series

connection is made by shorting pins 5 & 6 together

for the first line and pins 7 & 8 for the second line.

Pins 1 & 4 are connected to the lines that are to

be protected. Pins 2 & 3 are connected to ground.

See application note SI96-14 for additional details.

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:

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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.

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The ESD transient return path to ground should be

kept as short as possible.

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Never run critical signals near board edges.

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Use ground planes whenever possible.

Optional Connection for Protecting 5V Lines

LINE 2

LINE 3

LINE 4

LINE 1

1

2

3

45

6

7

8

Ground

From Connector

To Protected

Device

Applications Information