FM25040 Datasheet, PDF (1/14 Pages) List of Unclassifed Manufacturers – 4Kb FRAM Serial Memory

FM25040
4Kb FRAM Serial Memory
Features
4K bit Ferroelectric Nonvolatile RAM
• Organized as 512 x 8 bits
• High endurance 10 Billion (10¹⁰) 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)
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.
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
Pin Configuration
CS
SO
WP
VSS
VCC
HOLD
SCK
SI
Pin Names
/CS
SO
/WP
VSS
SI
SCK
/HOLD
VCC
Function
Chip Select
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock
Hold
Supply Voltage 5V
Ordering Information
FM25040-P
8-pin plastic DIP
FM25040-S
8-pin SOP
This data sheet contains design specifications for product development.
These specifications may change in any manner without notice
11 May 2000
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, [phone], Fax [phone]
www.ramtron.com
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