Other Parts Discussed in Thread: SN65LVDS31, STRIKE
Hello everyone. We are using several SN65LVDS31 drivers in our system on various cards. During various stages of our testing we do a continuity and resistance (C&R) check on most of our interfaces looking for changes in behavior. During this testing we probe the continuity between the high and low outputs of the drivers and between these outputs and ground. We normally have a very high resistance reading of greater than 400k. Recently we noticed that a handful of these drivers have failed this testing. Instead of the 400k resistance, we are seeing readings less than 100 ohms and one reading of about 50k. The devices involved are on separate cards, but the signals come to the same test connector. This feels like an ESD problem, but I wanted to probe the community to see what other failure modes might result in similar behavior. Could an overvoltage event on the power cause such behavior? What are the common failure modes for this device? Even though the resistance readings are off, is it likely the part is still functional? We have not powered anything back on since we discovered the bad readings. These particular signals are only used for test, so we're not sure when they went bad. Thanks very much in advance.
Damon Pritchett - Raytheon Missile Systems - Tucson, AZ
