UPD4992GS и другие
| Компонент | Описание | Производитель | |
| UPD4992GS | 8-Bit Parallel I/O Calendar Clock |
NEC |
 |
| UPD4992GS-E2 | 8-Bit Parallel I/O Calendar Clock |
NEC |
|
| UPD4992GS-T1 | 8-Bit Parallel I/O Calendar Clock |
NEC |
|
| UPD4992GS-T2 | 8-Bit Parallel I/O Calendar Clock |
NEC |
|