I'm doing a bit of testing with the SN74LS245 IC which is an octal bus transceiver. According to what I understand in the datasheet and the given truth table, pulling the DIR (pin 0) high (5V) and the OE (pin 19) low (0V) should result in the A side channels to be passed to the B side channels. (Ax to Bx)
I have a breadboard wired up in this configuration:
However, instead of measuring a 5V potential at B2 when 5V is present at A2, no voltage is passed through the other side. I've tried fiddling around with the direction pin but receive the same results in either direction.
Am I missing something in the datasheet or is it a possibility I have come across a bad chip?
Best Answer
It sounds like you may have a short on the output or the chip is damaged. The wiring looks proper.