| MC100EL51 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC100EL51D | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC100EL51DR2 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC100EL51DT | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC100EL51DTR2 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC10EL51 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC10EL51D | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC10EL51DR2 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC10EL51DT | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |
| MC10EL51DTR2 | ON Semiconductor | 5V ECL Differential Clock D Flip-Flop |