FM31L274 판매점 - (FM31L27x) 3V Integrated Processor Companion

FM31L274 반도체 회로 부품 판매점

(FM31L27x) 3V Integrated Processor Companion

Ramtron

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.cFoemrroelectric Nonvolatile RAM

• 4Kb, 16Kb, 64Kb, and 256Kb versions

• Unlimited Read/Write Endurance

• 10 year Data Retention

• NoDelay™ Writes

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

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, 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.

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.

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

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.

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.

This is a product in pre-production phase of development. Device

characterization is complete and Ramtron does not expect to change

the specifications. Ramtron will issue a Product Change Notice if

any specification changes are made.

Rev. 2.0

Dec. 2007

Ramtron International Corporation

1850 Ramtron Drive, Colorado Springs, CO 80921

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

www.ramtron.com

Page 1 of 25

Pin Configuration

CNT1

CNT2

CAL/PFO

RST

VSS

www.DataSheet4U.com

VDD

SCL

SDA

PFI

VBAK

FM31L278/L276/L274/L272 - 3V I2C Companion

Pin Name

CNT1, CNT2

A0, A1

CAL/PFO

/RST

PFI

X1, X2

SDA

SCL

VBAK

VDD

VSS

Function

Event Counter Inputs

Device Select inputs

Clock Calibration and Early

Power-Fail Output

Reset Input/Output

Early Power-fail Input

Crystal Connections

Serial Data

Serial Clock

Battery-Backup Supply

Supply Voltage

Ground

Ordering Information

Base Configuration Memory Size

FM31L278

256Kb

FM31L276

64Kb

FM31L274

16Kb

FM31L272

4Kb

Operating Voltage

2.7-3.6V

Reset Threshold

2.6V, 2.9V

Ordering Part Number

FM31L278-G

FM31L276-G

FM31L274-G

FM31L272-G

Other memory configurations may be available. Please contact the factory for more information.

Rev. 2.0

Dec. 2007

Page 2 of 25

PDF 파일 내의 페이지 : 총 25 페이지

제조업체: Ramtron

( ramtron )

FM31L274 data

데이터시트 다운로드 :

[ FM31L274.PDF ]

[ FM31L274 다른 제조사 검색 ]

국내 전력반도체 판매점

상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743

일반적인 전자부품 판매점

디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14

FM31L274 반도체 회로 부품 판매점

(FM31L27x) 3V Integrated Processor Companion

국내 전력반도체 판매점

일반적인 전자부품 판매점

관련 데이터시트