FM24CL64
64Kb Serial 3V F-RAM Memory Features
Low Power Operation 64K bit Ferroelectric Nonvolatile RAM • True 2.7V-3.6V Operation • Organized as 8,192 x 8 bits • 75 µ A Active Current (100 kHz) • Unlimited Read/Write Cycles • 1 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 and 8-pin TDFN Packages Fast Two-wire Serial Interface • “Green”/RoHS Packaging Options • Up to 1 MHz maximum bus frequency • Direct hardware replacement for EEPROM • Supports legacy timing for 100 kHz & 400 kHz
Description Pin Configuration
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.
A0A1
A2VSSVDDWP
SCL
SDA
12
3
487
6
5 To p Vie w
A0 A1 A2 VSSVDD WP SCL SDA 1234 8765 Pin Names Function A0-A2 Device Select Address SDA Serial Data/address SCL Serial Clock WP Write Protect VSS Ground VDD Supply Voltage
Ordering Information
FM24CL64-S * 8-pin SOIC FM24CL64-G “Green” 8-pin SOIC FM24CL64-DG “Green” 8-pin DFN * Not recommended for new designs.
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. 3.2 Mar. 2008 Page 1 of 13
