DS1314 Datasheet (Maxim Integrated) - 3V Nonvolatile Controller

DS1314, 3V Nonvolatile Controller

VCCI VCCO VBAT - 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 DS1314 No

DS1314 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