FM22L1655TG Ramtron, FM22L1655TG Datasheet
FM22L1655TG
Manufacturer Part Number
FM22L1655TG
Description
TSOP44
Manufacturer
Ramtron
Datasheet
1.FM22L1655TG.pdf
(14 pages)
Specifications of FM22L1655TG
Date_code
11+
Preliminary
FM22L16
4Mbit F-RAM Memory
Features
4Mbit Ferroelectric Nonvolatile RAM
SRAM Compatible
Advanced Features
Description
The FM22L16 is a 256Kx16 nonvolatile memory that
reads and writes like a standard SRAM. A
ferroelectric random access memory or F-RAM is
nonvolatile, which means that data is retained after
power is removed. It provides data retention for over
10 years while eliminating the reliability concerns,
functional
complexities of battery-backed SRAM (BBSRAM).
Fast write timing and high write endurance make the
F-RAM superior to other types of memory.
In-system operation of the FM22L16 is very similar
to other RAM devices and can be used as a drop-in
replacement for standard SRAM. Read and write
cycles may be triggered by /CE or simply by
changing the address. The F-RAM memory is
nonvolatile due to its unique ferroelectric memory
process. These features make the FM22L16 ideal for
nonvolatile memory applications requiring frequent
or rapid writes in the form of an SRAM.
The FM22L16 includes a low voltage monitor that
blocks access to the memory array when V
below a critical threshold. The memory is protected
against an inadvertent access and data corruption
under this condition. The device also features
software-controlled write protection. The memory
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.2
Dec. 2007
Organized as 256Kx16
Configurable as 512Kx8 Using /UB, /LB
10
NoDelay™ Writes
Page Mode Operation to 40MHz
Advanced High-Reliability Ferroelectric Process
JEDEC 256Kx16 SRAM Pinout
55 ns Access Time, 110 ns Cycle Time
Low V
Inadvertent Writes
Software Programmable Block Write Protect
14
Read/Write Cycles
DD
disadvantages,
Monitor Protects Memory against
and
system
DD
design
drops
Superior to Battery-backed SRAM Modules
Low Power Operation
Industry Standard Configuration
array is divided into 8 uniform blocks, each of which
can be individually write protected.
The device is available in a 400 mil 44-pin TSOP-II
surface mount package. Device specifications are
guaranteed over industrial temperature range –40°C
to +85°C.
Pin Configuration
FM22L16-55-TG
No Battery Concerns
Monolithic Reliability
True Surface Mount Solution, No Rework Steps
Superior for Moisture, Shock, and Vibration
2.7V – 3.6V Power Supply
Low Current Mode (5µA) using ZZ pin
18 mA Active Current
Industrial Temperature -40 C to +85 C
44-pin “Green”/RoHS TSOP-II package
VDD
DQ0
DQ1
DQ2
DQ3
VSS
DQ4
DQ5
DQ6
DQ7
A17
A16
A15
A14
A13
WE
CE
A4
A3
A2
A1
A0
1850 Ramtron Drive, Colorado Springs, CO 80921
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Ordering Information
55 ns access, 44-pin
“Green”/RoHS TSOP-II
Ramtron International Corporation
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
44
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Page 1 of 14
A5
A6
A7
OE
UB
LB
DQ15
DQ14
DQ13
DQ12
VSS
VDD
DQ11
DQ10
DQ9
DQ8
/ZZ
A8
A9
A10
A11
A12
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