This product conforms to specifications per the terms of the Ramtron
Ramtron International Corporation
standard warranty. Production processing does not necessarily in-
1850 Ramtron Drive, Colorado Springs, CO 80921
clude testing of all parameters.
(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058
www.ramtron.com
Rev. 2.1
Aug. 2003
Page 1 of 14
FM25C160
16Kb FRAM Serial Memory
Features
16K bit Ferroelectric Nonvolatile RAM
•
Organized as 2,048 x 8 bits
•
High Endurance 1 Trillion (10
12) Read/Writes
•
10 year Data Retention
•
NoDelay™ Writes
•
Advanced High-Reliability Ferroelectric Process
Very Fast Serial Peripheral Interface - SPI
•
Up to 5 MHz maximum Bus Frequency
•
Direct hardware replacement for EEPROM
•
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
Sophisticated Write Protection Scheme
•
Hardware Protection
•
Software Protection
Low Power Consumption
•
10
µA Standby Current
Industry Standard Configuration
•
Industrial Temperature -40
° C to +85° C
•
8-pin SOIC
Description
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 10 years while
eliminating the complexities, overhead, and system
level reliability problems caused by EEPROM and
other nonvolatile memories.
Unlike serial EEPROMs, the FM25C160 performs
write operations at bus speed. No write delays are
incurred. Data is written to the memory array mere
hundreds
of
nanoseconds
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 10
12 read/write cycles --
far more than most systems will require from a serial
memory.
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.
The FM25C160 provides substantial benefits to users
of
serial
EEPROM,
in
a
hardware
drop-in
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.
Pin Configuration
Pin Name
Function
/CS
Chip Select
/WP
Write Protect
/HOLD
Hold
SCK
Serial Clock
SI
Serial Data Input
SO
Serial Data Output
VDD
5V
VSS
Ground
Ordering Information
FM25C160-S
8-pin SOIC
CS
SO
WP
VSS
VDD
HOLD
SCK
SI
1
2
3
4
8
7
6
5
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