Pre-Production
FM25V02
256Kb Serial 3V F-RAM Memory
Features
Device ID and Serial Number
256K bit Ferroelectric Nonvolatile RAM
•
•
Device ID reads out Manufacturer ID & Part ID
Unique Serial Number (FM25VN02)
•
•
•
•
•
Organized as 32,768 x 8 bits
High Endurance 100 Trillion (1014) Read/Writes
10 Year Data Retention
Low Voltage, Low Power
NoDelay™ Writes
•
•
•
Low Voltage Operation 2.0V – 3.6V
90 µA Standby Current (typ.)
5 µA Sleep Mode Current (typ.)
Advanced High-Reliability Ferroelectric Process
Very Fast Serial Peripheral Interface - SPI
•
•
•
Up to 40 MHz Frequency
Direct Hardware Replacement for Serial Flash
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Industry Standard Configurations
•
•
•
Industrial Temperature -40°C to +85°C
8-pin “Green”/RoHS SOIC Package
8-pin “Green”/RoHS TDFN Package
Write Protection Scheme
•
•
Hardware Protection
Software Protection
serial number that is read-only and can be used to
identify a board or system. Both devices incorporate
a read-only Device ID that allows the host to
determine the manufacturer, product density, and
product revision. The devices are guaranteed over an
industrial temperature range of -40°C to +85°C.
Description
The FM25V02 is a 256-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 10 years
while eliminating the complexities, overhead, and
system level reliability problems caused by Serial
Flash and other nonvolatile memories.
Pin Configuration
1
2
3
4
8
7
6
5
S
Q
VDD
HOLD
C
Unlike Serial Flash, the FM25V02 performs write
operations at bus speed. No write delays are incurred.
Data is written to the memory array immediately
after it has been transferred to the device. The next
bus cycle may commence without the need for data
polling. The product offers very high write
endurance, orders of magnitude more endurance than
Serial Flash. Also, F-RAM exhibits lower power
consumption than Serial Flash.
W
VSS
D
1
2
3
8
7
6
VDD
/HOLD
C
D
/S
Q
/W
VSS
These capabilities make the FM25V02 ideal for
nonvolatile memory applications requiring frequent
or rapid writes or low power operation. Examples
range from data collection, where the number of
write cycles may be critical, to demanding industrial
controls where the long write time of Serial Flash can
cause data loss.
Top View
Function
Pin Name
/S
Chip Select
Write Protect
Hold
/W
/HOLD
C
Serial Clock
The FM25V02 provides substantial benefits to users
of Serial Flash as a hardware drop-in replacement.
The devices use the high-speed SPI bus, which
enhances the high-speed write capability of F-RAM
technology. The FM25VN02 is offered with a unique
D
Q
Serial Data Input
Serial Data Output
Supply Voltage
Ground
VDD
VSS
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.
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
Rev. 2.0
May 2010
Page 1 of 17
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