[RAMTRON]

Description

The FM32xx is a family of integrated devices that includes the most commonly needed functions for processor-based systems. Major features include nonvolatile memory available in various sizes, lowVDD 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 family operates from 2.7 to 5.5V.

Features

High Integration Device Replaces Multiple Parts

• Serial Nonvolatile Memory

• Low Voltage Reset

• Watchdog Timer

• Early Power-Fail Warning/NMI

• Two 16-bit Event Counters

• Serial Number with Write-lock for Security

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 System Intrusions or other Events

• Comparator for Early Power-Fail Interrupt

• 64-bit Programmable Serial Number with Lock

Ferroelectric Nonvolatile RAM

• 4Kb, 16Kb, 64Kb, and 256Kb versions

• Unlimited Read/Write Endurance

• 10 year Data Retention

• NoDelay™ Writes

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

• Companion Controlled via 2-wire Interface

Easy to Use Configurations

• Operates from 2.7 to 5.5V

• Small Footprint 14-pin SOIC (-S)

o “Green” 14-pin SOIC (-G)

• Pin Compatible with FM31xx Series

• Low Operating Current

• -40°C to +85°C Operation