Product Summary

The FM31L278-G is a 3V Integrated Processor Companion with Memory. The device includes the most commonly needed functions for processor based systems. Major features of the FM31L278-G 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 FM31L278-G operates from 2.7 to 3.6V. The FM31L278-G provides nonvolatile RAM available in sizes including 4Kb, 16Kb, 64Kb, and 256Kb versions. Fast write speed and unlimited endurance allow the memory to serve as extra RAM or conventional nonvolatile storage. This memory is truly nonvolatile rather than battery backed.

Parametrics

FM31L278-G absolute maximum ratings: (1)VDD, Power Supply Voltage with respect to VSS: -1.0V to +5.0V; (2)VIN, Voltage on any signal pin with respect to VSS: -1.0V to +5.0V and VIN ≤ VDD+1.0V ; (3)VBAK, Backup Supply Voltage: -1.0V to +4.5V; (4)TSTG, Storage Temperature: -55 to + 125℃; (5)TLEAD, Lead Temperature (Soldering, 10 seconds): 300℃; (6)VESD, Electrostatic Discharge Voltage: 3kV; (7)Package Moisture Sensitivity Level: MSL-1.

Features

FM31L278-G features: (1)Real-time Clock (RTC); (2)Low Voltage Reset; (3)Watchdog Timer; (4)Early Power-Fail Warning/NMI; (5)Two 16-bit Event Counters; (6)Serial Number with Write-lock for Security; (7)Active-low Reset Output for VDD and Watchdog; (8)Programmable VDD Reset Trip Point; (9)Manual Reset Filtered and Debounced; (10)Programmable Watchdog Timer; (11)Dual Battery-backed Event Counter Tracks System Intrusions or other Events; (12)Comparator for Early Power-Fail Interrupt; (13)64-bit Programmable Serial Number with Lock.

Diagrams

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
FM31L278-G
FM31L278-G
Ramtron
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF
Data Sheet
0-1: $4.78
1-10: $4.29
10-50: $3.88
50-100: $3.52
FM31L278-GTR
FM31L278-GTR
Ramtron
F-RAM 256K w/RTC Pwr Mon WDT Bat Sw PF
Data Sheet
0-2500: $2.86