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FM25640B 参数 Datasheet PDF下载

FM25640B图片预览
型号: FM25640B
PDF下载: 下载PDF文件 查看货源
内容描述: 64Kb的串行5V F-RAM存储器 [64Kb Serial 5V F-RAM Memory]
分类和应用: 存储
文件页数/大小: 13 页 / 213 K
品牌: RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
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Preliminary
FM25640B
64Kb Serial 5V F-RAM Memory
Features
64K bit Ferroelectric Nonvolatile RAM
Organized as 8,192 x 8 bits
High Endurance 1 Trillion (10
12
) Read/Writes
38 Year Data Retention
NoDelay™ Writes
Advanced high-reliability ferroelectric process
Very Fast Serial Peripheral Interface - SPI
Up to 20 MHz maximum bus frequency
Direct hardware replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Sophisticated Write Protection Scheme
Hardware Protection
Software Protection
Low Power Consumption
250
µA
Active Current (1 MHz)
4
µA
(typ.) Standby Current
Industry Standard Configuration
Industrial Temperature -40°C to +85°C
8-pin “Green”/RoHS SOIC (-G)
Description
The FM25640B is a 64-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 FM25640B 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 FM25640B is capable of
supporting up to 10
12
read/write cycles, or a million
times more write cycles than EEPROM.
These capabilities make the FM25640B 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 FM25640B provides substantial benefits to users
of serial EEPROM, in a hardware drop-in
replacement. The FM25640B 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.
Pin Configuration
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VDD
HOLD
SCK
SI
Pin Names
/CS
/HOLD
/WP
SCK
SI
SO
VDD
VSS
Function
Chip Select
Hold
Write Protect
Serial Clock
Serial Data Input
Serial Data Output
5V
Ground
Ordering Information
FM25640B-G
FM25640B-GTR
“Green”/RoHS 8-pin SOIC
“Green”/RoHS 8-pin SOIC,
Tape & Reel
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.2
Mar. 2011
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-F-RAM, (719) 481-7000
www.ramtron.com
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