DS1321 controller equivalent, flexible nonvolatile controller.
* Converts CMOS SRAM into nonvolatile memory
* Unconditionally write-protects SRAM when VCC is out of tolerance
* Automatically switches to battery backup sup.
VCCI VCCO VBAT A, B
- +5V Power Supply Input - SRAM Power Supply Output - Backup Battery Input - Address Inputs
CEI1 - CEI4 - Chip Enable Inputs
CEO1 - CEO4 - Chip Enable Outputs
TOL
- VCC Tolerance Select
BW - Battery Warning Output (Open
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