FM24W256-EGTR Ramtron, FM24W256-EGTR Datasheet

FM24W256-EGTR

Manufacturer Part Number

FM24W256-EGTR

Description

EIAJ SOIC8 T&R

Manufacturer

Ramtron

Datasheet

1.FM24W256-EGTR.pdf (13 pages)

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Preliminary

FM24W256

256Kb Wide Voltage Serial F-RAM

Features

256K bit Ferroelectric Nonvolatile RAM



Fast Two-wire Serial Interface



Description

The FM24W256 is a 256-kilobit nonvolatile memory

employing an advanced ferroelectric process. A

ferroelectric random access memory or F-RAM is

nonvolatile and performs reads and writes like a

RAM. It provides reliable data retention for 10 years

while eliminating the complexities, overhead, and

system

EEPROM and other nonvolatile memories.

The FM24W256 performs write operations at bus

speed. No write delays are incurred. Data is written to

the memory array immediately after it has been

successfully transferred to the device. The next bus

cycle may commence immediately without the need

for data polling. In addition, the product offers

substantial write endurance compared with other

nonvolatile memories. The FM24W256 is capable of

supporting 10

times more write cycles than EEPROM.

These capabilities make the FM24W256 ideal for

nonvolatile memory applications requiring frequent

or rapid writes. Examples range from data collection

where the number of write cycles may be critical, to

demanding industrial controls where the long write

time of EEPROM can cause data loss. The

combination of features allows more frequent data

writing with less overhead for the system.

The FM24W256 provides substantial benefits to

users of serial EEPROM, yet these benefits are

available in a hardware drop-in replacement. The

FM24W256 is available in industry standard 8-pin

SOIC package using a familiar two-wire protocol. It

is guaranteed over an industrial temperature range of

-40°C to +85°C.

This is a product that has fixed target specifications but are subject

to change pending characterization results.

Rev. 1.3

July 2011

Organized as 32,768 x 8 bits

High Endurance 100 Trillion (10

38 year Data Retention (

NoDelay™ Writes

Advanced High-Reliability Ferroelectric Process

Up to 1 MHz maximum bus frequency

Direct hardware replacement for EEPROM

Supports legacy timing for 100 kHz & 400 kHz

level

reliability

read/write cycles, or 100 million

problems

+75ºC)

) Read/Writes

caused



Industry Standard Configuration



Pin Configuration

* Not Recommended for New Designs

Low Power Operation

Pin Names

A0-A2

SDA

SCL

VSS

VDD

Ordering Information

FM24W256-G

FM24W256-GTR

FM24W256-EG*

FM24W256-EGTR*

Wide Voltage Operation 2.7V-5.5V

100 A Active Current (100 kHz)

15 A Standby Current (typ.)

Industrial Temperature -40 C to +85 C

8-pin “Green”/RoHS SOIC Packages

VSS

1850 Ramtron Drive, Colorado Springs, CO 80921

Function

Device Select Address

Serial Data/Address

Serial Clock

Write Protect

Ground

Supply Voltage

Ramtron International Corporation

8-pin “Green”/RoHS SOIC

8-pin “Green”/RoHS SOIC, Tape

& Reel

8-pin “Green”/RoHS EIAJ SOIC

8-pin “Green”/RoHS EIAJ SOIC,

Tape & Reel

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

http://www.ramtron.com

VDD

SCL

SDA

Page 1 of 13

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