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FM31L274

Ramtron
Part Number FM31L274
Manufacturer Ramtron
Description (FM31L27x) 3V Integrated Processor Companion
Published Oct 10, 2008
Detailed Description Pre-Production FM31L278/L276/L274/L272 3V Integrated Processor Companion with Memory Features High Integration Device R...
Datasheet PDF File FM31L274 PDF File

FM31L274
FM31L274

Overview
Pre-Production FM31L278/L276/L274/L272 3V Integrated Processor Companion with Memory Features 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 www.
DataSheet4U.
com 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 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 Easy to Use Configurations • Operates from 2.
7 to 3.
6V • 14-pin “Green”/RoHS SOIC package (-G) • Low Operating Current • -40°C to +85°C Operation Ferroelectric Nonvolatile RAM • 4Kb, 16Kb, 64Kb, and 256Kb versions • Unlimited Read/Write Endurance • 10 year Data Retention • NoDelay™ Writes Real-time Clock/Calendar • Backup Current under 1 µA • Seconds through Centuries in BCD format • Tracks Leap Years through 2099 • Uses Standard 32.
768 kHz Crystal (12.
5pF) • Software Calibration • Supports Battery or Capacitor Backup Description The FM31L27x 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, 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 family operates from 2.
7 to 3.
6V.
Each FM31L27x provides nonvolatile RAM available in sizes including 4Kb, 16Kb, 64Kb, and 256Kb versions.
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