74ACQ657 Quiet Series?????????? Octal Bidirectional Transceiver with
74ACQ657CW Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and 3-STATE Outputs
74ACQ657SPC Quiet Series? Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker 3-STATE Outputs
74ACQ657SPCQR Single 8-bit Bus Transceiver