DESCRIPTION

· The DS1218 is a CMOS circuit designed to convert CMOS RAM into nonvolatile memory.
· It monitors incoming power for out-of-tolerance conditions and switches to battery power during failures.
· The chip uses a low-leakage CMOS process for precise voltage detection with minimal battery consumption.
· It is packaged in an 8-pin format, minimizing PCB space requirements.
· When combined with a full CMOS memory and lithium batteries, it can achieve 10 years of nonvolatile RAM operation.

FEATURES

· Converts CMOS RAM into nonvolatile memory.
· Provides unconditional write protection when VCC is out of tolerance.
· Automatically switches to battery power during power failures.
· Available in space-saving 8-pin PDIP or 8-pin 150 mil SO packages.
· Consumes less than 100 nA of battery current.

APPLICATIONS

· Ideal for applications requiring nonvolatile memory solutions.
· Suitable for systems needing reliable power-fail detection and battery backup.
· Used in devices where PCB space is limited and low power consumption is critical.