| 54ACTQ574 | 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 |
| 54ACTQ574DMQB | 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 |
| 54ACTQ574FM-MLS | National Semiconductor | Quiet Series Octal D Flip-Flop with TRI-STATE Outputs |