FM25040BG Ramtron, FM25040BG Datasheet

FM25040BG

Manufacturer Part Number

FM25040BG

Description

SOP8

Manufacturer

Ramtron

Datasheet

1.FM25040B-G.pdf (13 pages)

Specifications of FM25040BG

Date_code

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Preliminary

FM25040B

4Kb Serial 5V F-RAM Memory

Features

4K bit Ferroelectric Nonvolatile RAM

•

Very Fast Serial Peripheral Interface - SPI

•

Description

The FM25040B is a 4-kilobit nonvolatile memory

employing an advanced ferroelectric process. A

ferroelectric random access memory or F-RAM is

nonvolatile but operates in other respects as a RAM.

It provides reliable data retention for 38 years while

eliminating the complexities, overhead, and system

level reliability problems caused by EEPROM and

other nonvolatile memories.

The FM25040B 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. The FM25040B is capable of

supporting up to 10

times more write cycles than EEPROM.

These capabilities make the FM25040B 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 FM25040B provides substantial benefits to users

replacement. The FM25040B uses the high-speed

SPI bus, which enhances the high-speed write

capability of F-RAM technology. The specifications

are 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. 1.2

Feb. 2011

Organized as 512 x 8 bits

High Endurance 1 Trillion (10

38 year Data Retention

NoDelay™ Writes

Advanced High-Reliability Ferroelectric Process

Up to 20 MHz maximum Bus Frequency

Direct hardware replacement for EEPROM

SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)

serial

EEPROM,

read/write cycles, or a million

hardware

) Read/Writes

drop-in

Sophisticated Write Protection Scheme

•

Low Power Consumption

•

Industry Standard Configuration

•

Pin Configuration

Pin Names

/CS

/WP

/HOLD

SCK

VDD

VSS

Ordering Information

FM25040B-G

FM25040B-GTR

Hardware Protection

Software Protection

250 µA Active Current (1 MHz)

4 µA (typ.) Standby Current

Industrial Temperature -40° C to +85° C

8-pin “Green”/RoHS SOIC (-G)

VSS

1850 Ramtron Drive, Colorado Springs, CO 80921

Function

Chip Select

Write Protect

Hold

Serial Clock

Serial Data Input

Serial Data Output

Supply Voltage 5V

Ground

Ramtron International Corporation

“Green” 8-pin SOIC

“Green” 8-pin SOIC,

Tape & Reel

(800) 545-F-RAM, (719) 481-7000

www.ramtron.com

VDD

HOLD

SCK

Page 1 of

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