FM31256-G

Product Summary

The FM31256-G integrated processor includes the most commonly needed functions. 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 FM31256-G operates from 2.7 to 5.5V. It provides nonvolatile RAM available in sizes including 4Kb, 16Kb, 64Kb, and 256Kb versions. Fast write speed and unlimited ndurance allow the memory to serve as extra RAM or conventional nonvolatile storage.

Parametrics

Absolute maximum ratings: (1)VDD, Power Supply Voltage with respect to VSS: -1.0V to +7.0V; (2)VIN, Voltage on any signal pin with respect to VSS: -1.0V to +7.0V 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): 260℃ ; (6)VESD, Electrostatic Discharge Voltage: Human Body Model (JEDEC Std JESD22-A114-B): 2kV; Charged Device Model (JEDEC Std JESD22-C101-A): 1.25kV; Machine Model (JEDEC Std JESD22-A115-A): 100V; (7)Package Moisture Sensitivity Level: MSL-2.

Features

Features: (1)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 Counters; Serial Number with Write-lock for Security; (2)Ferroelectric Nonvolatile RAM: 4Kb, 16Kb, 64Kb, and 256Kb versions; Virtually Unlimited Read/Write Endurance; 38 year Data Retention (+75℃ ); NoDelay Writes; (3)Real-time Clock/Calendar: Backup Current 1.4 μA; Seconds through Centuries in BCD format; Tracks Leap Years through 2099; Uses Standard 32.768 kHz Crystal (6pF); Software Calibration; Supports Battery or Capacitor Backup; (4)Processor Companion: Active-low Reset Output for VDD and Watchdog; Programmable VDD Reset Trip Point; manual Reset Filtered and Debounced; Programmable Watchdog Timer; Dual Battery-backed Event Counter Tracks; (5)System Intrusions or other Events: Comparator for Early Power-Fail Interrupt; 64-bit Programmable Serial Number with Lock; (6)Fast Two-wire Serial Interface: Up to 1 MHz Maximum Bus Frequency; Supports Legacy Timing for 100 kHz & 400 kHz; Device Select Pins for up to 4 Memory Devices; RTC, Supervisor Controlled via 2-wire Interface; (7)Easy to Use Configurations: Operates from 2.7 to 5.5V; Small Footprint 14-pin “Green” SOIC (-G); Low Operating Current; -40℃ to +85℃ Operation.

Diagrams