| Manufacturer | Part Number | Description |
|---|---|---|
Xicor
| X1228 | Real Time Clock/Calendar/CPU Supervisor with EEPROM |
Intersil (now Renesas)
| X1228 | Real Time Clock/Calendar/CPU Supervisor |
Maxim Integrated (now Analog Devices)
| MAX1228 | 12-Bit 300ksps ADCs |
