| 54ACTQ544 | National Semiconductor | Quiet Series Octal Registered Transceiver with TRI-STATE Outputs |
| 54ACTQ544FMQB | National Semiconductor | Quiet Series Octal Registered Transceiver with TRI-STATE Outputs |
| 54ACTQ544LMQB | National Semiconductor | Quiet Series Octal Registered Transceiver with TRI-STATE Outputs |
| 54ACTQ544SDMQB | National Semiconductor | Quiet Series Octal Registered Transceiver with TRI-STATE Outputs |
| 54ACTQ573 | National Semiconductor | Quiet Series Octal Latch with TRI-STATE Outputs |
| 54ACTQ574 | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ574DMQB | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ574FM-MLS | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ574FMQB | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ574LMQB | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ646 | National Semiconductor | Quiet Series Octal Transceiver/Register with 3-STATE Outputs |
| 54ACTQ657 | National Semiconductor | Quiet Series Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and TRI-STATE Outputs |
| 54ACTQ821 | National Semiconductor | Quiet Series 10-Bit D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ821FMQB | National Semiconductor | Quiet Series 10-Bit D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ821LMQB | National Semiconductor | Quiet Series 10-Bit D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ821SDMQB | National Semiconductor | Quiet Series 10-Bit D Flip-Flop with TRI-STATE Outputs |
| 54ACTQ827 | National Semiconductor | Quiet Series 10-Bit Buffer/Line Driver with TRI-STATE Outputs |
| 54ACTQ841 | National Semiconductor | Quiet Series 10-Bit Buffer/Line Driver with TRI-STATE Outputs |
| 54F00 | National Semiconductor | Quad 2-Input NAND Gate |
| 54F00DMQB | National Semiconductor | Quad 2-Input NAND Gate |