FM25L256 Datasheet, PDF (1/14 Pages) List of Unclassifed Manufacturers – 256Kb FRAM Serial 3V Memory

Pre-Production
FM25L256
256Kb FRAM Serial 3V Memory – Extended Temp.
Features
256K bit Ferroelectric Nonvolatile RAM
• Organized as 32,768 x 8 bits
• Unlimited Read/Write Cycles
• 10 Year Data Retention
• NoDelay™ Writes
• Advanced High-Reliability Ferroelectric Process
Write Protection Scheme
• Hardware Protection
• Software Protection
Low Power Consumption
• Low Voltage Operation 3.0V – 3.6V
• 1 µA (typ) Standby Current
Very Fast Serial Peripheral Interface - SPI
• Up to 20 MHz Frequency
D • Direct Hardware Replacement for EEPROM
• SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
DE _Description
N ^{S The FM25L256 is a 256-kilobit nonvolatile memory}
employing an advanced ferroelectric process. A
E ^{N ferroelectric random access memory or FRAM is}
nonvolatile and performs reads and writes like a
M IG ^{RAM. It provides reliable data retention for 10 years}
while eliminating the complexities, overhead, and
B _{system level reliability problems caused by}
M ^{S 6} _{EEPROM and other nonvolatile memories.}
O ^{E 25} Unlike serial EEPROMs, the FM25L256 performs
C ^{D L write operations at bus speed. No write delays are}
5 _{incurred. Data is written to the memory array}
2 _{immediately after each byte has been transferred to}
E M _{the device. The next bus cycle may commence}
W _{F without the need for data polling. In addition, the}
R _E : _{product offers virtually unlimited write endurance.}
e _{FRAM also exhibits much lower power consumption}
T _{N tiv} ^{than EEPROM.}
a _{These capabilities make the FM25L256 ideal for}
O _{R rn nonvolatile memory applications requiring frequent}
N _{O lte} ^{or rapid writes or low power operation. Examples}
range from data collection, where the number of
A ^{write cycles may be critical, to demanding industrial}
F ^{controls where the long write time of EEPROM can}
Industry Standard Configurations
• Extended Temperature -25°C to +85°C
• 8-pin SOIC and 8-pin TDFN Packages
• “Green” Packaging Options
Pin Configuration
CS
1
SO
2
WP
3
VSS
4
8
VDD
7
HOLD
6
SCK
5
SI
/CS 1
SO 2
/WP 3
VSS 4
8 VDD
7 /HOLD
6 SCK
5 SI
Top View
Pin Name
/CS
/WP
/HOLD
SCK
SI
SO
Function
Chip Select
Write Protect
Hold
Serial Clock
Serial Data Input
Serial Data Output
cause data loss.
VDD
Supply Voltage (3.0 to 3.6V)
VSS
Ground
The FM25L256 provides substantial benefits to users
of serial EEPROM as a hardware drop-in
replacement. The FM25L256 uses the high-speed SPI
Ordering Information
bus, which enhances the high-speed write capability
FM25L256-S
8-pin SOIC
of FRAM technology. Device specifications are
FM25L256-G
“Green” 8-pin SOIC
guaranteed over an extended temperature range of
FM25L256-DG “Green” 8-pin TDFN
-25°C to +85°C.
This is a product in the pre-production phase of development. Device
characterization is complete and Ramtron does not expect to change the
specifications. Ramtron will issue a Product Change Notice if any
specification changes are made.
Rev. 2.3
March 2007
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, [phone]
www.ramtron.com
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