Datasheet > FM25256-G

FM25256-G

更新时间： 2024-09-24 22:40:55

品牌	Logo	应用领域
其他 - ETC		存储
页数	文件大小	规格书
13页	122K
描述
256Kb FRAM Serial 5V Memory

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中文翻译

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FM25256-G 数据手册

Pre-Production

FM25256

256Kb FRAM Serial 5V Memory

Features

Write Protection Scheme

256K bit Ferroelectric Nonvolatile RAM

•

Hardware Protection

Software Protection

•

Organized as 32,768 x 8 bits

Unlimited Read/Write Cycles

10 Year Data Retention

NoDelay™ Writes

Advanced High-Reliability Ferroelectric Process

Wide Operating Range

Wide Voltage Operation 4.0V – 5.5V

•

Industry Standard Configurations

Very Fast Serial Peripheral Interface - SPI

•

Industrial Temperature -40°C to +85°C

8-pin SOIC (-S)

“Green” 8-pin SOIC (-G)

•

Up to 25 MHz Frequency

Direct Hardware Replacement for EEPROM

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

Description

Pin Configuration

The FM25256 is a 256-kilobit nonvolatile memory

employing an advanced ferroelectric process. A

ferroelectric random access memory or FRAM 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.

VDD

HOLD

SCK

VSS

Unlike serial EEPROMs, the FM25256 performs

write operations at bus speed. No write delays are

incurred. The next bus cycle may commence

immediately without the need for data polling. The

next bus cycle may start immediately. In addition, the

product offers virtually unlimited write endurance.

Also, FRAM exhibits much lower power

consumption than EEPROM.

Pin Name

/CS

/WP

/HOLD

SCK

VDD

VSS

Function

Chip Select

Write Protect

Hold

Serial Clock

Serial Data Input

Serial Data Output

These capabilities make the FM25256 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 EEPROM can

cause data loss.

Supply Voltage (4.0 to 5.5V)

Ground

Ordering Information

FM25256-S

8-pin SOIC

FM25256-G

“Green” 8-pin SOIC

The FM25256 provides substantial benefits to users

of serial EEPROM as

hardware drop-in

replacement. The FM25256 uses the high-speed SPI

bus, which enhances the high-speed write capability

of FRAM 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.

Ramtron International Corporation

1850 Ramtron Drive, Colorado Springs, CO 80921

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

www.ramtron.com

Rev. 2.0

Apr. 2005

Page 1 of 13

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与FM25256-G相关器件

型号	品牌	获取价格	描述	数据表
FM25256-S	ETC	获取价格	256Kb FRAM Serial 5V Memory
FM25320	FM	获取价格	EEPROM
FM2540-7	POWER-ONE	获取价格	50 Watt DC-DC Converters
FM2540-7P	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE
FM2540-7PA	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE
FM2540-7PAF	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE
FM2540-7PAH	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE
FM2540-7PAHF	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE
FM2540-7PD0	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, METAL, CASE M02, MODULE
FM2540-7PD0A	BEL	获取价格	DC-DC Regulated Power Supply Module, 2 Output, 50W, Hybrid, METAL, CASE M02, MODULE

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