| 54ACTQ657 | National Semiconductor | Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and TRI-STATE Outputs |
| 5962-9219701M3A(54ACTQ657LMQB) | National Semiconductor | Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and TRI-STATE Outputs |
| 5962-9219701MLA(54ACTQ657SDMQB) | National Semiconductor | Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and TRI-STATE Outputs |
| 5962-9219701MKA(54ACTQ657FMQB) | National Semiconductor | Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and TRI-STATE Outputs |