Other Parts Discussed in Thread: PGA900, TVS1401
I meet a problem about XTR111 EF pin. When voltage on VSP over 19V, the EF pin not be low when wire disconnected.
The EF pin pull low function well from 7V to 19V (VSP voltage).
Here are schematich, pull high voltage AVDD is 3V. I use PGA900 GPIO1 to detect the EF pin signal.
Would you help to give any sugggestion for the issue?