M54/74HCT245/640/643 M54/74HCT245/640/643 OCTAL BU.
National Semiconductor
MM54HCT643 - True-Inverting Octal TRI-STATE Transceiver
MM54HCT640 MM74HCT640 Inverting Octal TRI-STATE Transceiver MM54HCT643 MM74HCT643 True-Inverting Octal TRI-STATE Transceiver February 1988 MM54HCT64.
ST Microelectronics
M54HCT643 - Octal Bus Transceiver
M54/74HCT245/640/643 M54/74HCT245/640/643 OCTAL BUS TRANSCEIVER (3-STATE): HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON INVERTING . . .
