9 Power Supply Recommendations

This device is a passive TVS diode-based ESD protection device, therefore there is no requirement to power it.

Ensure that the maximum voltage specifications for each pin are not violated.

10 Layout

10.1 Layout Guidelines

• The optimum placement of the 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 3 is connected to ground, use a thick and short trace for this return path.

10.2 Layout Example

This example is typical of a dual channel differential data pair application, such as CAN.

GND

= VIA to GND

IO2

IO1

Figure 10-1. Routing with DBZ Package

ESD2CANFD24

SLVSH12 – NOVEMBER 2022

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