Preliminary
FM25CL64B
64Kb Serial 3V F-RAM Memory
Features
64K bit Ferroelectric Nonvolatile RAM
•
Organized as 8,192 x 8 bits
•
High Endurance 100 Trillion (10
14
) Read/Writes
•
38 Year Data Retention (
@
+75ºC)
•
NoDelay™ Writes
•
Advanced High-Reliability Ferroelectric Process
Very Fast Serial Peripheral Interface - SPI
•
Up to 20 MHz 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
•
Low Voltage Operation 2.7-3.65V
•
200
µA
Active Current (1 MHz)
•
3
µA
(typ.) Standby Current
Industry Standard Configuration
•
Industrial Temperature -40°C to +85°C
•
8-pin “Green”/RoHS SOIC and TDFN Packages
Description
The FM25CL64B is a 64-kilobit 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 38 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 successfully transferred to the device. The next
bus cycle may commence immediately without the
need for data polling. In addition, the product offers
substantial write endurance compared with other
nonvolatile memories. The FM25CL64B is capable
of supporting 10
14
read/write cycles, or 100 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 industrial controls where the long write
time of EEPROM can cause data loss.
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
F-RAM
technology.
Device
specifications are guaranteed over an industrial
temperature range of -40°C to +85°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.
Pin Configuration
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VDD
HOLD
SCK
SI
Top View
/CS
SO
/WP
VSS
1
2
3
4
8
7
6
5
VDD
/HOLD
SCK
SI
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
Ground
Ordering Information
FM25CL64B-G
“Green” 8-pin SOIC
FM25CL64B-GTR
“Green” 8-pin SOIC,
Tape & Reel
FM25CL64B-DG
“Green”/RoHS 8-pin TDFN
FM25CL64B-DGTR
“Green”/RoHS 8-pin TDFN,
Tape & Reel
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
Rev. 1.2
Feb. 2011
Page 1 of 14
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
