DS1218
Nonvolatile Controller
Part Details
- Converts CMOS RAM into nonvolatile memories
- Unconditionally write protects when VCC is out of tolerance
- Automatically switches to battery when power fail occurs
- Space saving 8-pin PDIP or 8-pin 150 mil SO Packages
- Consumes less than 100nA of battery current
The DS1218 Nonvolatile Controller Chip supplies circuitry required to render standard CMOS RAM nonvolatile. VCC is monitored using a precise comparator that detects power-fail and inhibits chip-enable holding a write-protect status until power supplies return to nominal levels. The DS1218 switches active power supplies between VCC and a battery source, whichever is greater. The switch has a voltage drop of less than 0.2V.
Documentation
Data Sheet 1
Technical Articles 1
This is the most up-to-date revision of the Data Sheet.
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