We are requesting an RMA to return 3 IC's for failure analyzes. EPM240T100C3N IC CPLD 192MC 4.7NS 100TQFP

WaniMY,

The part fails with pin 47 shorted to ground. This low causes the PLD to shutdown it's output's, which is what's supposed to happen. The circuitry connected to pin 47 is a 4.99K pullup resistor to 3.3V and an open drain comparator powered from 5V and the gate of a 2N7002 MOSFET. We have approximately 40 devices fielded and have seen four confirmed failures. We are concerned that we could be inducing these failures, although I do no see how and I am looking for guidance on what we could possibly be doing. All of the components connected to this pin are within one inch of the part, so there are no long runs which could be injecting currents that could damage the part. I need to stop these failures from occurring and I will take any help I can get.

Bill Peterson

D&V Electronics

w.peterson@dvelectronics.com