| 54ACTQ821 | National Semiconductor | Quiet Series 10-Bit D Flip-Flop with TRI-STATE Outputs |
| 54F109 | National Semiconductor | Dual JK (Note: Overbar Over the K) Positive Edge-Triggered Flip-Flop |
| 54F174 | National Semiconductor | Hex D Flip-Flop with Master Reset |
| 54F175 | National Semiconductor | Quad D Flip-Flop |
| 54F273 | National Semiconductor | Octal D Flip-Flop |
| 54F374 | National Semiconductor | Octal D Flip-Flop with Clock Enable |
| 54F377 | National Semiconductor | Octal D Flip-Flop with Clock Enable |
| 54F534 | National Semiconductor | Octal D Flip-Flop with TRI-STATE Outputs |
| 54F574 | National Semiconductor | Octal D Flip-Flop with TRI-STATE Outputs |
| 54F74 | National Semiconductor | Dual D-Type Positive Edge-Triggered Flip-Flop |
| 54F821 | National Semiconductor | 10-Bit D Flip-Flop |
| 54F823 | National Semiconductor | 9-Bit D Flip-Flop |
| 54F825 | National Semiconductor | 8-Bit D Flip-Flop [Life-time buy] |
| 54FCT273 | National Semiconductor | Octal D-Type Flip-Flop |
| 54FCT374 | National Semiconductor | Octal D-Type Flip-Flop with TRI-STATE Outputs |
| 54FCT377 | National Semiconductor | Octal D-Type Flip-Flop with Clock Enable |
| 54FCT574 | National Semiconductor | Octal D-Type Flip-Flop with TRI-STATE Outputs |
| 54LS109 | National Semiconductor | |
| 54LS174 | National Semiconductor | Hex D Flip-Flop with Clear |
| 54LS175 | National Semiconductor | Quad D Flip-Flop with Clear and Complementary Outputs |