FM24C64
64Kb FRAM Serial Memory Features
Low Power Operation 64K bit Ferroelectric Nonvolatile RAM • 5V operation • Organized as 8,192 x 8 bits • 150 µ A Active Current (100 kHz) • High Endurance 1 Trillion (10
12 ) Read/Writes • 10 µ A Standby Current • 45 Year Data Retention • NoDelay™ Writes Industry Standard Configuration • Advanced High-Reliability Ferroelectric Process • Industrial Temperature -40 ° C to +85 ° C • 8-pin SOIC (-S) Fast Two-wire Serial Interface • “Green” 8-pin SOIC (-G) • Up to 1 MHz maximum bus frequency • Direct hardware replacement for EEPROM • Supports legacy timing for 100 kHz & 400 kHz
Description Pin Configuration
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 45 years while eliminating the complexities, overhead, and system level reliability problems caused by EEPROM and other nonvolatile
memories. 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 10
A0A1
A2VSSVDDWP
SCL
SDA
12
3
487
6
5 12 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 an industry standard 8-pin SOIC package using a two-wire protocol. The specifications are guaranteed over an industrial temperature range of -40°C to +85°C. Pin Names Function A0-A2 Device Select Address SDA Serial Data/address SCL Serial Clock WP Write Protect VSS Ground VDD Supply Voltage 5V
Ordering Information
FM24C64-S 8-pin SOIC FM24C64-G “Green” 8-pin SOIC
This product conforms to specifications per the terms of the Ramtron Ramtron International Corporation standard warranty. The product has completed Ramtron’s internal 1850 Ramtron Drive, Colorado Springs, CO 80921 qualification testing and has reached production status. (800) 545-FRAM, (719) 481-7000 www.ramtron.com Rev. 3.0 Mar. 2005 1 of 12
