DESCRIPTION
The DS1210 Nonvolatile Controller Chip is a CMOS circuit which solves the application problem of converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-of-tolerance condition. When such a condition is detected, chip enable is inhibited to accomplish write protection and the battery is switched on to supply the RAM with uninterrupted power. Special circuitry uses a low leakage CMOS process which affords precise voltage detection at extremely low battery consumption.
FEATURES
â Converts CMOS RAMs into Nonvolatile
Memories
â Unconditionally Write Protects when VCC is
Out-of-Tolerance
â Automatically Switches to Battery when
Power-Fail Occurs
â Space-Saving 8-Pin PDIP or 16-Pin SO
Packages
â Consumes <100nA of Battery Current
â Tests Battery Condition on Power up
â Provides for Redundant Batteries
â Optional 5% or 10% Power-Fail Detection
â Low Forward Voltage Drop on the VCC
Switch
â Optional Industrial (N) Temperature Range of
40°C to +85°C
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