Description
VBAT VCCO VCC GND PF
PF
WC/ SC RC IN
NMI ST
CEO CEI PBRST RST
RST
- +3-Volt Battery Input - Switched SRAM Supply Output - +5-Volt Power Supply Input - Ground - Power-Fail (Active High) - Power-Fail (Active Low) - Wake-Up Control (Sleep) - Reset Control - Early Warning Input - Non-Maskable Interru
Features
- Holds microprocessor in check during power transients Halts and restarts an out-of-control microprocessor Monitors pushbutton for external override Warns microprocessor of an impending power failure Converts CMOS SRAM into nonvolatile memory Unconditionally write protects memory when power supply is out of tolerance Consumes less than 100 nA of battery current at 25°C Controls external power switch for high current.
DS1236A Datasheet
