FM25H20-G Ramtron, FM25H20-G Datasheet

FM25H20-G

Manufacturer Part Number

FM25H20-G

Description

EIAJ SOIC8

Manufacturer

Ramtron

Datasheet

1.FM25H20-G.pdf (15 pages)

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Pre-Production

FM25H20

2Mb Serial 3V F-RAM Memory

Features

2M bit Ferroelectric Nonvolatile RAM

•

Very Fast Serial Peripheral Interface - SPI

•

Description

The FM25H20 is a 2-megabit 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 Serial

Flash and other nonvolatile memories.

Unlike Serial Flash, the FM25H20 performs write

operations at bus speed. No write delays are incurred.

Data is written to the memory array immediately

after it has been transferred to the device. The next

bus cycle may commence without the need for data

polling. The product offers virtually unlimited write

endurance, orders of magnitude more endurance than

Serial Flash. Also, F-RAM exhibits lower power

consumption than Serial Flash.

These capabilities make the FM25H20 ideal for

nonvolatile memory applications requiring frequent

or rapid writes or low power operation. Examples

range from data collection, where the number of

write cycles may be critical, to demanding industrial

controls where the long write time of Serial Flash can

cause data loss.

The FM25H20 provides substantial benefits to users

of Serial Flash as a hardware drop-in replacement.

The FM25H20 uses the high-speed SPI bus, which

enhances the high-speed write capability of F-RAM

technology. Device specifications are guaranteed

over an industrial temperature range of -40°C to

+85°C.

This is a product in the 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. 2.2

Sept. 2010

Organized as 256K x 8 bits

High Endurance 100 Trillion (10

10 Year Data Retention

NoDelay™ Writes

Advanced High-Reliability Ferroelectric Process

Up to 40 MHz Frequency

Direct Hardware Replacement for Serial Flash

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

) Read/Writes

Write Protection Scheme

•

Low Power Consumption

•

Industry Standard Configurations

•

Pin Configuration

Pinout is equivalent to other SPI F-RAM devices.

Pin Name

/HOLD

VDD

VSS

Ordering Information

FM25H20-DG

FM25H20-DGTR

FM25H20-G

FM25H20-GTR

Hardware Protection

Software Protection

Low Voltage Operation 2.7V – 3.6V

Sleep Mode Current 3 µA (typ.)

Industrial Temperature -40°C to +85°C

8-pin “Green”/RoHS TDFN Package

8- pin “Green”/RoHS EIAJ SOIC Package

VSS

1850 Ramtron Drive, Colorado Springs, CO 80921

Function

Chip Select

Write Protect

Hold

Serial Clock

Serial Data Input

Serial Data Output

Supply Voltage (2.7 to 3.6V)

Ground

Top View

8-pin “Green”/RoHS TDFN

8-pin “Green”/RoHS TDFN,

Tape & Reel

8-pin “Green”/RoHS EIAJ SOIC

8-pin “Green”/RoHS EIAJ

SOIC, Tape & Reel

Ramtron International Corporation

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

http://www.ramtron.com

VDD

/HOLD

VDD

HOLD

Page 1 of 15

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