For optimal performance, place
the device 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.
Pin 1 and 2 are not internally
connected. To achieve the rated performance, it is required to connect Pin 1 and
2 together on the PCB as close to the device as possible and route the signal to
ground. Also use a thick and short trace for this return path.