DS1312 Datasheet - Maxim Integrated

DS1312 Nonvolatile Controller

VCCI VCCO VBAT - +5V Power Supply Input - SRAM Power Supply Output - Backup Battery Input CEI - Chip Enable Input CEO TOL BW - Chip Enable Output - VCC Tolerance Select - Battery Warning Output (Open Drain) RST GND NC - Reset Output (Open Drain) - Ground - No Connection DESCRIPTION The DS131.

DS1312 Features

* Converts CMOS SRAM into nonvolatile memory

* Unconditionally write-protects SRAM when VCC is out of tolerance

* Automatically switches to battery backup supply when VCC power failure occurs

* Monitors voltage of a lithium cell and provides advanced warning of impending battery fail

DS1312-MaximIntegrated.pdf