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參數(shù)資料
| 型號(hào)： | FM25256 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 256Kb FRAM Serial 5V Memory |
| 中文描述： | 的256Kb FRAM的串行5V的記憶 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 120K |
| 代理商： | FM25256 |
Pre-Production
FM25256
256Kb FRAM Serial 5V Memory
Features
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. 2.0
Apr. 2005
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
www.ramtron.com
Page 1 of 13
256K bit Ferroelectric Nonvolatile RAM
Organized as 32,768 x 8 bits
Unlimited Read/Write Cycles
10 Year Data Retention
NoDelay Writes
Advanced High-Reliability Ferroelectric Process
Very Fast Serial Peripheral Interface - SPI
Up to 25 MHz Frequency
Direct Hardware Replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Description
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.
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
consumption than EEPROM.
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.
The FM25256 provides substantial benefits to users
of serial EEPROM as a 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.
Write Protection Scheme
Hardware Protection
Software Protection
Wide Operating Range
Wide Voltage Operation 4.0V – 5.5V
Industry Standard Configurations
Industrial Temperature -40
°
C to +85
°
C
8-pin SOIC (-S)
“Green” 8-pin SOIC (-G)
much
lower
power
Pin Configuration
Pin Name
/CS
/WP
/HOLD
SCK
SI
SO
VDD
VSS
Function
Chip Select
Write Protect
Hold
Serial Clock
Serial Data Input
Serial Data Output
Supply Voltage (4.0 to 5.5V)
Ground
Ordering Information
FM25256-S
FM25256-G
8-pin SOIC
“Green” 8-pin SOIC
CS
SO
WP
VSS
VDD
HOLD
SCK
SI
1
2
3
4
8
7
6
5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FM25256-G | 256Kb FRAM Serial 5V Memory |
| FM25256-S | 256Kb FRAM Serial 5V Memory |
| FM25640 | TERM STRIP, TH, LO PRO |
| FM25640-S | LOW PROFILE .025 SQ STRIPS |
| FM25CL04 | 4Kb FRAM Serial 3V Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FM25256B | 制造商:RAMTRON 制造商全稱:RAMTRON 功能描述:256Kb FRAM Serial 5V Memory |
| FM25256B-DG | 功能描述:F-RAM 256K (32Kx8) 5V RoHS:否 存儲(chǔ)容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
| FM25256B-DGTR | 功能描述:F-RAM 256K (32Kx8) 5V RoHS:否 存儲(chǔ)容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
| FM25256B-G | 功能描述:F-RAM 256K (32Kx8) 5V RoHS:否 存儲(chǔ)容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
| FM25256B-GTR | 功能描述:F-RAM 256K (32Kx8) 5V RoHS:否 存儲(chǔ)容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
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