FM24CL64
64Kb Serial 3V F-RAM Memory
Features
64K bit Ferroelectric Nonvolatile RAM
• Organized as 8,192 x 8 bits
• Unlimited Read/Write Cycles
• 45 year Data Retention
• NoDelay™ Writes
• Advanced High-Reliability Ferroelectric Process
Low Power Operation
• True 2.7V-3.6V Operation
• 75 µA Active Current (100 kHz)
• 1 µA Standby Current
Industry Standard Configuration
• Industrial Temperature -40° C to +85° C
• 8-pin “Green”/RoHS SOIC and TDFN Packages
• Grade 3 AEC-Q100 Qualified (SOIC only)
D
E
D S
N N
E G
M SI 4B
M E L6
O D 4C
C
2
E W FM
R E ve:
T N ati
O R ern
N O Alt
F
Fast Two-wire Serial Interface
• Up to 1 MHz maximum bus frequency
• Direct hardware replacement for EEPROM
• Supports legacy timing for 100 kHz & 400 kHz
Description
The FM24CL64 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 45 years
while eliminating the complexities, overhead, and
system level reliability problems caused by
EEPROM and other nonvolatile memories.
The FM24CL64 performs write operations at bus
speed. No write delays are incurred. The next bus
cycle may commence immediately without the need
for data polling. In addition, the product offers write
endurance orders of magnitude higher than
EEPROM. Also, F-RAM exhibits much lower power
during writes than EEPROM since write operations
do not require an internally elevated power supply
voltage for write circuits.
These capabilities make the FM24CL64 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
combination of features allows more frequent data
writing with less overhead for the system.
The FM24CL64 provides substantial benefits to users
of serial EEPROM, yet these benefits are available in
a hardware drop-in replacement. The FM24CL64 is
available in industry standard 8-pin SOIC and DFN
packages using a familiar two-wire protocol. It is
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
A0
A1
A2
1
8
2
7
3
6
VDD
WP
SCL
VSS
4
5
SDA
Top View
A0
A1
A2
VSS
Pin Names
A0-A2
SDA
SCL
WP
VSS
VDD
1
8
2
7
3
6
4
5
VDD
WP
SCL
SDA
Function
Device Select Address
Serial Data/address
Serial Clock
Write Protect
Ground
Supply Voltage
Ordering Information
FM24CL64-G †
FM24CL64-GTR †
“Green”/RoHS 8-pin SOIC
“Green”/RoHS 8-pin SOIC,
Tape & Reel
FM24CL64-DG
“Green”/RoHS 8-pin DFN
FM24CL64-DGTR “Green”/RoHS 8-pin DFN,
Tape & Reel
FM24CL64-S *
8-pin SOIC
FM24CL64-STR * 8-pin SOIC, Tape & Reel
† Grade 3 AEC-Q100 Qualified
* End of life. Last time buy June 2009.
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
www.ramtron.com
Rev. 3.4
Feb. 2011
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