9 Power Supply Recommendations

This is a passive TVS diode-based ESD protection device, therefore there is no need to power it. Take care that

the maximum voltage specifications for each pin are not violated.

10 Layout

10.1 Layout Guidelines

• The optimum placement of the ESD protection device is as close to the connector as possible

– EMI during an ESD event can couple from the trace being struck to other nearby unprotected traces,

resulting in early system failures

– The PCB designer must minimize the possibility of EMI coupling by keeping any unprotected traces away

from the protected traces which are between the TVS and the connector

• Route the protected traces as straight as possible

• Eliminate any sharp corners on the protected traces between the TVS and the connector by using rounded

corners with the largest radii possible

– Electric fields tend to build up on corners, increasing EMI coupling

• If pin 1 or pin 2 is connected to ground, use a thick and short trace for this return path

10.2 Layout Example

To protected IC

Place pin 1 on the signal line

Thick and short return path to GND

Minimum

distance

from

connector

(source of

ESD)

To connector

Figure 10-1. Layout Recommendation

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ESD341

SLVSGV3A – APRIL 2022 – REVISED JULY 2022

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