ST M48T37Y M48T37V 5.0 or 3.3V 256 Kbit (32 Kbit x8) TIMEKEEPER SRAM handbook
This document describes the features and characteristics of the M48T37Y and M48T37V models, including integrated ultra-low power SRAM, real-time clock, power-fail control circuit, and battery. It also includes a frequency test output for software calibration, year 2000 compliance, automatic power-fail chip deselect and write protection, watchdog timer, write protect voltage, packaging options, microprocessor power-on reset, programmable alarm output in battery back-up mode, battery low flag, and RoHS compliance.
