FM18L08_07 Datasheet, PDF (1/13 Pages) Ramtron International Corporation – 256Kb Bytewide FRAM Memory

FM18L08
256Kb Bytewide FRAM Memory
Features
256K bit Ferroelectric Nonvolatile RAM
• Organized as 32,768 x 8 bits
• 45 year Data Retention
• Unlimited Read/Write Cycles
• NoDelay™ Writes
• Advanced High-Reliability Ferroelectric Process
Superior to Battery-Backed SRAM
• No Battery Concerns
• Monolithic Reliability
• True Surface Mount Solution, No Rework Steps
• Superior for Moisture, Shock, and Vibration
• Resistant to Negative Voltage Undershoots
Description
The FM18L08 is a 256-kilobit nonvolatile memory
employing an advanced ferroelectric process. A
ferroelectric random access memory or FRAM is
nonvolatile and reads and writes like a RAM. It
provides data retention for 45 years while eliminating
the reliability concerns, functional disadvantages and
system design complexities of battery-backed SRAM
(BBSRAM). Fast write timing and high write
endurance make FRAM superior to other types of
nonvolatile memory.
In-system operation of the FM18L08 is very similar
to other RAM based devices. Read cycle and write
cycle times are equal. The FRAM memory, however,
is nonvolatile due to its unique ferroelectric memory
process. Unlike BBSRAM, the FM18L08 is a truly
monolithic nonvolatile memory. It provides the same
functional benefits of a fast write without the
disadvantages associated with modules and batteries
or hybrid memory solutions.
These capabilities make the FM18L08 ideal for
nonvolatile memory applications requiring frequent
or rapid writes in a bytewide environment. The
availability of a surface-mount package improves the
manufacturability of new designs, while the DIP
package facilitates simple design retrofits. Device
specifications are guaranteed over a temperature
range of -40°C to +85°C.
SRAM & EEPROM Compatible
• JEDEC 32Kx8 SRAM & EEPROM pinout
• 70 ns Access Time
• 140 ns Cycle Time
Low Power Operation
• 3.0V to 3.65V Operation
• 15 mA Active Current
• 15 µA Standby Current
Industry Standard Configuration
• Industrial Temperature -40° C to +85° C
• 32-pin “Green” TSOP Package
• 28-pin SOIC or DIP Package
• “Green” Packaging Options
Pin Configurations
NC
1
OE
2
A11
3
A9
4
A8
5
A13
6
WE
7
VDD
8
A14
9
A12
10
A7
11
A6
12
A5
13
A4
14
A3
15
NC
16
TSOP-I
32
NC
31
A10
30
CE
29
DQ7
28
DQ6
27
DQ5
26
DQ4
25
DQ3
24
VSS
23
DQ2
22
DQ1
21
DQ0
20
A0
19
A1
18
A2
17
NC
Ordering Information
FM18L08-70-TG 70 ns access, 32-pin “Green” TSOP
FM18L08-70-S
70 ns access, 28-pin SOIC
FM18L08-70-P
70 ns access, 28-pin DIP
FM18L08-70-SG 70 ns access, 28-pin “Green” SOIC
FM18L08-70-PG 70 ns access, 28-pin “Green” DIP
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. 3.4
July 2007
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, [phone]
http://www.ramtron.com
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