FM31256-G

FM31256-G is a 256Kbit integrated processor companion with F-RAM in a 14 pin SOIC package. The device integrates F-RAM memory with the most commonly needed functions for processor-based systems. Major features include non-volatile memory, real-time clock, low-VDD reset, watchdog timer, non-volatile 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. 256Kbit non-volatile memory employing an advanced ferroelectric process. A F-RAM is non-volatile and performs reads and writes similar to RAM. This memory is truly non-volatile 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 non-volatile memories. The FM31256 is capable of supporting 10^14 read/write cycles, or 100 million times more write cycles than EEPROM.

• 256Kbit ferroelectric random access memory (logically organized as 32K × 8)
• Fast 2-wire serial interface (I2C)
• 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
• Low power consumption of 1.5mA active current at 1MHz, 150µA (typ) standby current
• Operating voltage range from 2.7V to 5.5V
• Industrial temperature range from –40°C to +85°C