HD74LS668 и другие
| Компонент | Описание | Производитель | |
| HD74LS668 | Ouadruple 2-input Positive NAND Gates |
Hitachi Semiconductor |
 |
| HD74LS668 | Synchronous Up/Down Decade Counters |
Hitachi Semiconductor |
|
| HD74LS669 | Ouadruple 2-input Positive NAND Gates |
Hitachi Semiconductor |
|
| HD74LS669 | Synchronous Up / Down 4-bit Binary Counter |
Renesas Technology Corp |
|
| HD74LS669 | Synchronous Up/Down 4-bit Binary Counters |
Hitachi Semiconductor |
|
| HD74LS669FPEL | Synchronous Up / Down 4-bit Binary Counter |
Renesas Technology Corp |
|