Integrated devices that includes the most commonly needed functions for processor-based systems.

Serial Nonvolatile FRAM Memory
Real-time Clock (RTC)
Low Voltage Reset
Watchdog Timer
Early Power-Fail Warning/NMI
Two 16-bit Event Counters
Serial Number with Write-lock for Security
Battery-backed switchover
Event Counter Tracking
I²C interface

64-Kbit/256-Kbit ferroelectric random access memory (F-RAM)
Logically organized as 8K x 8 (FM31L276)/
32K x 8 (FM31L278)
High-endurance 100 trillion (1014) read/writes
151-year data retention
NoDelay™ writes
Advanced high-reliability ferroelectric process
High Integration Device Replaces Multiple Parts
Serial nonvolatile memory
Real time clock (RTC)
Low voltage reset
Watchdog timer
Early power-fail warning/NMI
Two 16-bit event counter
Serial number with write-lock for security
Real-time Clock/Calendar
Backup current at 2 V: 1.15 A at +25 C
Seconds through centuries in BCD format
Tracks leap years through 2099
Uses standard 32.768 kHz crystal (6 pF/12.5 pF)
Software calibration
Supports battery or capacitor backup
Processor Companion
Active-low reset output for VDD and watchdog
Programmable low-VDD reset trip point
Manual reset filtered and debounced
Programmable watchdog timer
Dual Battery-backed event counter tracks system intrusions or other events
Comparator for power-fail interrupt
64-bit programmable serial number with lock
Fast 2-wire serial interface (I2C)
Up to 1-MHz frequency
Supports legacy timings for 100 kHz and 400 kHz
RTC, Supervisor controlled via I
2C interface
Device select pins for up to 4 memory devices
Low power consumption
1.5 mA active current at 1 MHz
120 A standby current
Operating voltage: VDD = 2.7 V to 3.6 V
Industrial temperature: –40 C to +85 C