FM25040BG Ramtron, FM25040BG Datasheet
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FM25040BG
Manufacturer Part Number
FM25040BG
Description
SOP8
Manufacturer
Ramtron
Datasheet
1.FM25040B-G.pdf
(13 pages)
Specifications of FM25040BG
Date_code
10+
Preliminary
FM25040B
4Kb Serial 5V F-RAM Memory
Features
4K bit Ferroelectric Nonvolatile RAM
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Very Fast Serial Peripheral Interface - SPI
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Description
The FM25040B is a 4-kilobit nonvolatile memory
employing an advanced ferroelectric process. A
ferroelectric random access memory or F-RAM is
nonvolatile but operates in other respects as a RAM.
It provides reliable data retention for 38 years while
eliminating the complexities, overhead, and system
level reliability problems caused by EEPROM and
other nonvolatile memories.
The FM25040B 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 without the need
for data polling. The FM25040B is capable of
supporting up to 10
times more write cycles than EEPROM.
These capabilities make the FM25040B 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 FM25040B provides substantial benefits to users
of
replacement. The FM25040B uses the high-speed
SPI bus, which enhances the high-speed write
capability of F-RAM technology. The specifications
are guaranteed over an industrial temperature range
of -40°C to +85°C.
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.2
Feb. 2011
Organized as 512 x 8 bits
High Endurance 1 Trillion (10
38 year Data Retention
NoDelay™ Writes
Advanced High-Reliability Ferroelectric Process
Up to 20 MHz maximum Bus Frequency
Direct hardware replacement for EEPROM
SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)
serial
EEPROM,
12
read/write cycles, or a million
in
a
hardware
12
) Read/Writes
drop-in
Sophisticated Write Protection Scheme
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Low Power Consumption
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Industry Standard Configuration
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Pin Configuration
Pin Names
/CS
/WP
/HOLD
SCK
SI
SO
VDD
VSS
Ordering Information
FM25040B-G
FM25040B-GTR
Hardware Protection
Software Protection
250 µA Active Current (1 MHz)
4 µA (typ.) Standby Current
Industrial Temperature -40° C to +85° C
8-pin “Green”/RoHS SOIC (-G)
VSS
WP
SO
CS
1850 Ramtron Drive, Colorado Springs, CO 80921
Function
Chip Select
Write Protect
Hold
Serial Clock
Serial Data Input
Serial Data Output
Supply Voltage 5V
Ground
1
2
3
4
Ramtron International Corporation
“Green” 8-pin SOIC
“Green” 8-pin SOIC,
Tape & Reel
(800) 545-F-RAM, (719) 481-7000
8
7
6
5
www.ramtron.com
VDD
HOLD
SCK
SI
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