FM25C160
16Kb FRAM Serial Memory
Features
16K bit Ferroelectric Nonvolatile RAM
Sophisticated Write Protection Scheme
•
•
Hardware Protection
Software Protection
•
•
•
•
•
Organized as 2,048 x 8 bits
High Endurance 1 Trillion (1012) Read/Writes
45 year Data Retention
Low Power Consumption
10 µA Standby Current
NoDelay™ Writes
Advanced High-Reliability Ferroelectric Process
•
Industry Standard Configuration
Very Fast Serial Peripheral Interface - SPI
•
•
•
Industrial Temperature -40° C to +85° C
8-pin “Green”/RoHS SOIC (-G)
Grade 3 AEC-Q100 Qualified (-G)
•
•
•
Up to 20 MHz maximum Bus Frequency
Direct hardware replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Description
Pin Configuration
The FM25C160 is a 16-kilobit nonvolatile memory
employing an advanced ferroelectric process. A
ferroelectric random access memory or FRAM is
nonvolatile but operates in other respects as 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.
1
8
7
6
5
CS
SO
WP
VDD
HOLD
SCK
SI
2
3
4
VSS
Unlike serial EEPROMs, the FM25C160 performs
write operations at bus speed. No write delays are
incurred. Data is written to the memory array
immediately after it has been successfully transferred
to the device. The next bus cycle may commence
immediately. In addition, the product offers
substantial write endurance compared with other
nonvolatile memories. The FM25C160 is capable of
supporting up to 1012 read/write cycles -- far more
than most systems will require from a serial memory.
Pin Name
/CS
Function
Chip Select
Write Protect
Hold
/WP
/HOLD
SCK
SI
SO
VDD
VSS
Serial Clock
Serial Data Input
Serial Data Output
5V
These capabilities make the FM25C160 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.
Ground
Ordering Information
FM25C160-G
“Green” 8-pin SOIC
The FM25C160 provides substantial benefits to users
FM25C160-GTR
“Green” 8-pin SOIC,
of serial EEPROM, in
a
hardware drop-in
Tape & Reel
8-pin SOIC
replacement. The FM25C160 uses the high-speed SPI
bus, which enhances the high-speed write capability
of FRAM technology. The specifications are
guaranteed over an industrial temperature range of
-40°C to +85°C.
FM25C160-S *
FM25C160-STR * 8-pin SOIC, Tape & Reel
* End of life. Last time buy June 2009.
This product conforms to specifications per the terms of the Ramtron
standard warranty. The product has completed Ramtron’s internal
qualification testing and has reached production status.
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
www.ramtron.com
Rev. 3.3
Feb. 2011
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