AEC Q100 Grade 1 Compliant
FM25CL64B – Automotive Temp.
64Kb Serial 3V F-RAM Memory
Features
64K bit Ferroelectric Nonvolatile RAM
Organized as 8,192 x 8 bits
High Endurance 10 Trillion (1013) Read/Writes
NoDelay™ Writes
Advanced High-Reliability Ferroelectric Process
Fast Serial Peripheral Interface - SPI
Up to 16 MHz Frequency
Direct Hardware Replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Description
The FM25CL64B is a 64-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 years
while eliminating the complexities, overhead, and
system level reliability problems caused by
EEPROM and other nonvolatile memories.
The FM25CL64B performs write operations at bus
speed. No write delays are incurred. Data is written to
the memory array immediately after each byte has
been transferred to the device. The next bus cycle
may commence without the need for data polling.
The FM25CL64B is capable of supporting 1013
read/write cycles, or 10 million times more write
cycles than EEPROM.
These capabilities make the FM25CL64B 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 automotive controls where the long write
time of EEPROM can cause data loss.
Sophisticated Write Protection Scheme
Hardware Protection
Software Protection
Low Power Consumption
Low Voltage Operation 3.0-3.6V
6 A Standby Current (+85C)
Industry Standard Configuration
Automotive Temperature -40C to +125C
o Qualified to AEC Q100 Specification
“Green”/RoHS 8-pin SOIC
Pin Configuration
CS
SO
WP
1
8
2
7
3
6
VSS
4
5
Pin Name
/CS
/WP
/HOLD
SCK
SI
SO
VDD
VSS
VDD
HOLD
SCK
SI
Function
Chip Select
Write Protect
Hold
Serial Clock
Serial Data Input
Serial Data Output
Supply Voltage
Ground
Ordering Information
The FM25CL64B provides substantial benefits to
users of serial EEPROM as a hardware drop-in
replacement. The FM25CL64B uses the high-speed
SPI bus, which enhances the high-speed write
capability
of
FRAM
technology.
Device
specifications are guaranteed over the automotive
temperature range of -40°C to +125°C.
This product conforms to specifications per the terms of the Ramtron
standard warranty. The product has completed Ramtron’s internal
qualification testing and has reached production status.
Rev. 3.2
Oct. 2012
FM25CL64B-GA
FM25CL64B-GATR
“Green”/RoHS 8-pin SOIC,
Automotive Grade 1
“Green”/RoHS 8-pin SOIC,
Automotive Grade 1,
Tape & Reel
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
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