FM25640S Ramtron, FM25640S Datasheet

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FM25640S

Manufacturer Part Number
FM25640S
Description
SOIC8
Manufacturer
Ramtron
Datasheet
FM25640
64Kb FRAM Serial Memory
Features
64K bit Ferroelectric Nonvolatile RAM
Very Fast Serial Peripheral Interface - SPI
Description
The FM25640 is a 64-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.
Unlike serial EEPROMs, the FM25640 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.
substantial write endurance compared with other
nonvolatile memories. The FM25640 is capable of
supporting up to 10
than most systems will require from a serial memory.
These capabilities make the FM25640 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 FM25640 provides substantial benefits to users
of
replacement. The FM25640 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.
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.
Rev. 3.0
Mar. 2005
Organized as 8,192 x 8 bits
High Endurance 1 Trillion (10
45 Year Data Retention
NoDelay™ Writes
Advanced high-reliability ferroelectric process
Up to 5 MHz maximum bus frequency
Direct hardware replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
serial
EEPROM,
In
addition,
12
read/write cycles -- far more
in
a
the
hardware
12
) Read/Writes
product
drop-in
offers
Sophisticated Write Protection Scheme
Low Power Consumption
Industry Standard Configuration
Pin Configuration
Pin Names
/CS
/HOLD
/WP
SCK
SI
SO
VDD
VSS
Ordering Information
FM25640-S
FM25640-G
Hardware Protection
Software Protection
10 A Standby Current
Industrial Temperature -40 C to +85 C
8-pin SOIC
“Green” 8-pin SOIC
VSS
WP
SO
CS
1850 Ramtron Drive, Colorado Springs, CO 80921
Function
Chip Select
Hold
Write Protect
Serial Clock
Serial Data Input
Serial Data Output
5V
Ground
1
2
3
4
8-pin SOIC
“Green” 8-pin SOIC
Ramtron International Corporation
(800) 545-FRAM, (719) 481-7000
8
7
6
5
www.ramtron.com
VDD
HOLD
SCK
SI
1 of 13

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