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FM25640 데이터시트(PDF) 1 Page - Ramtron International Corporation

부품명 FM25640
상세설명  64Kb FRAM Serial Memory
Download  14 Pages
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제조업체  RAMTRON [Ramtron International Corporation]
홈페이지  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM25640 데이터시트(HTML) 1 Page - Ramtron International Corporation

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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
1 of 14
FM25640
64Kb FRAM Serial Memory
Features
64K bit Ferroelectric Nonvolatile RAM
Organized as 8,192 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 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 10 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 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 FM25640 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 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
serial
EEPROM,
in
a
hardware
drop-in
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.
Pin Configuration
Pin Names
Function
/CS
Chip Select
/HOLD
Hold
/WP
Write Protect
SCK
Serial Clock
SI
Serial Data Input
SO
Serial Data Output
VDD
5V
VSS
Ground
Ordering Information
FM25640-S
8-pin SOIC
CS
SO
WP
VSS
VDD
HOLD
SCK
SI
1
2
3
4
8
7
6
5


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