Datasheet Summary
DS1212 Nonvolatile Controller x 16 Chip
.dalsemi.
Features
Converts full CMOS RAM into nonvolatile memory Unconditionally write protects when VCC is out of tolerance Automatically switches to battery when power-fail occurs 4 to 16 decoder provides control for up to 16 CMOS RAMs Consumes less than 100 nA of battery current Tests battery condition on power-up Provides for redundant batteries Power fail signal can be used to interrupt processor on power failure Optional 5% or 10% power-fail detection Optional 28-pin PLCC surface mount package Optional industrial temperature range of -40°C to +85°C
PIN ASSIGNMENT
VBAT1 VCCO TOL PF CE15 CE14 CE13 CE12 CE11 D C B A GND 1 2 3 4 5 6 7 8 9...