FM24C64
64Kb FRAM Serial Memory
Features
64K bit Ferroelectric Nonvolatile RAM
• Organized as 8,192 x 8 bits
• High Endurance 1 Trillion (1012) Read/Writes
• 10 Year Data Retention
• NoDelay™ Writes
• Advanced High-Reliability Ferroelectric Process
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 FM24C64 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 10 years
while eliminating the complexities, overhead, and
system level reliability problems caused by
EEPROM and other nonvolatile memories.
Low Power Operation
• 5V operation
• 150 µA Active Current (100 kHz)
• 10 µA Standby Current
Industry Standard Configuration
• Industrial Temperature -40° C to +85° C
• 8-pin SOIC or DIP
Pin Configuration
A0
A1
A2
1
8
2
7
3
6
VSS
4
5
VDD
WP
SCL
SDA
The FM24C64 performs write operations at bus
speed. No write delays are incurred. Data is written to
the memory array in the cycle after it has been
successfully transferred to the device. The next bus
cycle may commence immediately. The FM24C64 is
capable of supporting 1012 read/write cycles, or a
million times more write cycles than EEPROM.
These capabilities make the FM24C64 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
writes with less overhead for the system.
The FM24C64 provides substantial benefits to users
of serial EEPROM, yet these benefits are available in
a hardware drop-in replacement. The FM24C64 is
available in industry standard 8-pin packages using a
two-wire protocol. The 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. Production processing does not necessarily include testing of all parameters.
Rev. 2.2
Apr. 2002
Pin Names
A0-A2
SDA
SCL
WP
VSS
VDD
Function
Device Select Address
Serial Data/address
Serial Clock
Write Protect
Ground
Supply Voltage 5V
Ordering Information
FM24C64-P
FM24C64-S
8-pin plastic DIP
8-pin SOIC
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058
www.ramtron.com
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