7.2.3 Application Curve

D009_S21.grf

Frequency (GHz)

0.1

0.2

0.3

0.5 0.7

1

2

3

4 5 6 7 8 10

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

D009

Figure 7-2. Insertion Loss Vs. Frequency

7.3 Power Supply Recommendations

Because the ESD321 is a passive ESD device, there is no need to power it. To help ensure the device functions

properly, do not violate the recommended I/O specification (0V to 3.6V).

7.4 Layout

7.4.1 Layout Guidelines

• The optimum placement 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, which increases EMI coupling.

ESD321

SLVSEN8C – JULY 2018 – REVISED JUNE 2025

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