| Manufacturer | Part Number | Description |
|---|---|---|
Maxim Integrated (now Analog Devices)
| DS1644P | Nonvolatile Timekeeping RAM |
|
Maxim Integrated (now Analog Devices)
| DS1644 | Nonvolatile Timekeeping RAM |
Dallas Semiconducotr
| DS1644LPM | Nonvolatile Timekeeping RAM |
