What is this part and where does it fit?
It provides four drivers and zero receivers — a pure transmit-side interface IC, not a transceiver. The 4.5V to 5.5V supply range and –40°C to 85°C industrial temperature grade suit it for PLCs, motor drives, factory automation, and any noisy environment where balanced signaling is needed.
Why the 16-DIP package matters on site
The 16-DIP (0.300", 7.62mm) through-hole package is a field-service win. No hot-air station needed — a socket or a soldering iron swap is all it takes. For repair techs carrying a field kit, this means you can replace the AM26C31IN on a customer's PLC card without a lab bench. The wide pin spacing also makes orientation obvious, reducing the risk of a backwards install.
