M4T28-BR12SH1TR и другие
| Компонент | Описание | Производитель | |
| M4T28-BR12SH1TR | TIMEKEEPER^ SNAPHAT^ (battery and crystal) |
STMicroelectronics |
 |
| M4T28-BR12SH1TR | TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
STMicroelectronics |
|