Summary
5V Integrated Processor Companion with Memory
Description
The FM3127x is a family of integrated devices that includes the most commonly needed functions for processor-based systems. Major features include nonvolatile memory available in various sizes, realtime clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for an early power-fail (NMI) interrupt or other purpose. The family operates from 4.0 to 5.5V.
Source title
FM31278 Datasheet(PDF) - Cypress Semiconductor