Preliminary

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

Ramtron International Corporation

to change pending characterization results.

1850 Ramtron Drive, Colorado Springs, CO 80921

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

Rev. 1.1

http://www.ramtron.com

Feb. 2009

Page 1 of 15

FM24V05

512Kb Serial 3V F-RAM Memory

Features

512K bit Ferroelectric Nonvolatile RAM

•

Organized as 65,536 x 8 bits

•

•

10 year Data Retention

•

NoDelay™ Writes

•

Advanced High-Reliability Ferroelectric Process

Fast Two-wire Serial Interface

•

Up to 3.4 MHz maximum bus frequency

•

Direct hardware replacement for EEPROM

•

Supports legacy timing for 100 kHz & 400 kHz

Device ID and Serial Number

•

Device ID reads out Manufacturer ID & Part ID

•

Unique Serial Number (FM24VN05)

Low Voltage, Low Power Operation

•

Low Voltage Operation 2.0V – 3.6V

•

Active Current < 150

•

90

µA Standby Current (typ.)

•

5

µA Sleep Mode Current (typ.)

Industry Standard Configuration

•

Industrial Temperature -40

° C to +85° C

•

8-pin “Green”/RoHS SOIC Package

Description

The FM24V05 is a 512Kbit 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 level

reliability

problems

caused

by

EEPROM and other nonvolatile memories.

The FM24V05 performs write operations at bus

speed. No write delays are incurred. The next bus

cycle may commence immediately without the need

for data polling. In addition, the product offers write

endurance

orders

of

magnitude

higher

than

EEPROM. Also, F-RAM exhibits much lower power

during writes than EEPROM since write operations

do not require an internally elevated power supply

voltage for write circuits.

These capabilities make the FM24V05 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 FM24V05 provides substantial benefits to users

of serial EEPROM, yet these benefits are available in

a hardware drop-in replacement. The devices are

available in industry standard 8-pin SOIC package

FM24VN05 is offered with a unique serial number

that is read-only and can be used to identify a board

or system. Both devices incorporate a read-only

Device ID that allows the host to determine the

manufacturer, product density, and product revision.

The devices are guaranteed over an industrial

temperature range of -40°C to +85°C.

Pin Configuration

A0

A1

A2

VSS

VDD

WP

SCL

SDA

1

2

3

4

8

7

6

5

Pin Name

Function

A0-A2

Device Select Address

SDA

Serial Data/address

SCL

Serial Clock

WP

Write Protect

VDD

Supply Voltage

VSS

Ground