FM31L278

更新时间： 2024-11-02 06:59:43

品牌	Logo	应用领域
铁电 - RAMTRON		/
页数	文件大小	规格书
25页	330K
描述
3V Integrated Processor Companion with Memory

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FM31L278 数据手册

FM31L278/L276/L274/L272

3V Integrated Processor Companion with Memory

Features

Processor Companion

High Integration Device Replaces Multiple Parts

•

Active-low Reset Output for V_DDand Watchdog

•

Serial Nonvolatile Memory

Programmable V_DDReset Trip Point

Real-time Clock (RTC)

Manual Reset Filtered and Debounced

Programmable Watchdog Timer

Low Voltage Reset

Watchdog Timer

Early Power-Fail Warning/NMI

Two 16-bit Event Counters

Serial Number with Write-lock for Security

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

Fast Two-wire Serial Interface

•

4Kb, 16Kb, 64Kb, and 256Kb versions

Unlimited Read/Write Endurance

45 year Data Retention

•

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

NoDelay™ Writes

Real-time Clock/Calendar

Easy to Use Configurations

•

Backup Current under 1 µA

•

Operates from 2.7 to 3.6V

Seconds through Centuries in BCD format

Tracks Leap Years through 2099

Uses Standard 32.768 kHz Crystal (12.5pF)

Software Calibration

14-pin “Green”/RoHS SOIC package (-G)

Low Operating Current

-40°C to +85°C Operation

Underwriters Laboratory (UL) Recognized

Supports Battery or Capacitor Backup

The processor companion includes commonly needed

CPU support functions. Supervisory functions

include a reset output signal controlled by either a

low VDD condition or a watchdog timeout. /RST

goes active when VDD drops below a programmable

threshold and remains active for 100 ms after VDD

rises above the trip point. A programmable watchdog

timer runs from 100 ms to 3 seconds. The watchdog

timer is optional, but if enabled it will assert the reset

signal for 100 ms if not restarted by the host before

the timeout. A flag-bit indicates the source of the

reset.

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, real-

time 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. 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.

A general-purpose comparator compares an external

input pin to the onboard 1.2V reference. This is

useful for generating a power-fail interrupt (NMI) but

can be used for any purpose. The family also includes

a programmable 64-bit serial number that can be

locked making it unalterable. Additionally it offers a

dual battery-backed event counter that tracks the

number of rising or falling edges detected on

dedicated input pins.

The real-time clock (RTC) provides time and date

information in BCD format. It can be permanently

powered from external backup voltage source, either

a battery or a capacitor. The timekeeper uses a

common external 32.768 kHz crystal and provides a

calibration mode that allows software adjustment of

timekeeping accuracy.

This product conforms to specifications per the terms of the Ramtron

standard warranty. The product has completed Ramtron’s internal

qualification testing and has reached production status.

Ramtron International Corporation

1850 Ramtron Drive, Colorado Springs, CO 80921

(800) 545-FRAM, (719) 481-7000

http://www.ramtron.com

Rev. 3.0

Feb. 2009

Page 1 of 25

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与FM31L278相关器件

型号	品牌	获取价格	描述	数据表
FM31L278_11	RAMTRON	获取价格	3V Integrated Processor Companion with Memory
FM31L278-G	RAMTRON	获取价格	3V Integrated Processor Companion with Memory
FM31L278-G	INFINEON	获取价格	铁电存储器 (F-RAM)
FM31L278-GTR	RAMTRON	获取价格	3V Integrated Processor Companion with Memory
FM31L278-GTR	INFINEON	获取价格	铁电存储器 (F-RAM)
FM31T372	RAMTRON	获取价格	System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
FM31T372-G	RAMTRON	获取价格	System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
FM31T374	RAMTRON	获取价格	System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
FM31T374-G	RAMTRON	获取价格	System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
FM31T376	RAMTRON	获取价格	System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal

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