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FM25040-S 数据表(PDF) 1 Page - List of Unclassifed Manufacturers

部件名 FM25040-S
功能描述  4Kb FRAM Serial Memory
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制造商  ETC [List of Unclassifed Manufacturers]
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标志 ETC - List of Unclassifed Manufacturers

FM25040-S 数据表(HTML) 1 Page - List of Unclassifed Manufacturers

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This data sheet contains design specifications for product development.
Ramtron International Corporation
These specifications may change in any manner without notice
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058
www.ramtron.com
11 May 2000
1/14
FM25040
4Kb FRAM Serial Memory
Features
4K bit Ferroelectric Nonvolatile RAM
Organized as 512 x 8 bits
High endurance 10 Billion (10
10) read/writes
10 year data retention at 85
° C
NoDelay™ write
Advanced high-reliability ferroelectric process
Fast Serial Peripheral Interface - SPI
Up to 2.1 MHz maximum bus frequency
Direct hardware replacement for EEPROM
Supports SPI Mode 0 (CPOL=0, CPHA=0)
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 SOP or DIP
Description
The FM25040 is a 4-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 FM25040 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 FM25040 is
capable of supporting up to 1E10 read/write cycles --
far more than most systems will require from a serial
memory.
These capabilities make the FM25040 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 FM25040 provides substantial benefits to users
of
serial
EEPROM,
in
a
hardware
drop-in
replacement. The FM25040 uses the high-speed SPI
bus which enhances the high-speed write capability of
FRAM technology. It is guaranteed over an industrial
temperature range of -40°C to +85°C.
Pin Configuration
CS
SO
WP
VSS
VCC
HOLD
SCK
SI
Pin Names
Function
/CS
Chip Select
SO
Serial Data Output
/WP
Write Protect
VSS
Ground
SI
Serial Data Input
SCK
Serial Clock
/HOLD
Hold
VCC
Supply Voltage 5V
Ordering Information
FM25040-P
8-pin plastic DIP
FM25040-S
8-pin SOP


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