Processor Companion 14-Pin SOIC

The FM31278 device integrates F-RAM memory with the most commonly needed functions for processor-based systems. Major features include nonvolatile memory, real time clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for a power-fail (NMI) interrupt or any other purpose. The FM31278 is a 64-Kbit/256-Kbit nonvolatile memory employing an advanced ferroelectric process. A ferroelectric random access memory or F-RAM is nonvolatile and performs reads and writes similar to a RAM. This memory is truly nonvolatile rather than battery backed. It provides reliable data retention for 151 years while eliminating the complexities, overhead, and system-level reliability problems caused by other nonvolatile memories. The FM31278 is capable of supporting 1014 read/write cycles, or 100 million times more write cycles than EEPROM.

• 64-Kbit/256-Kbit ferroelectric random access memory (F-RAM)
• Logically organized as 8 K × 8 (FM3164) / 32 K × 8 (FM31256)
• High-endurance 100 trillion (1014) read/writes
• 151-year data retention (See the Data Retention and Endurance table)
• 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)
• Software calibration
• Supports battery or capacitor backup
• Processor Companion -pin small outline integrated circuit (SOIC) package
• Restriction of hazardous substances (RoHS) compliant