FM22L16 Datasheet, PDF (1/14 Pages) Ramtron International Corporation – 4Mbit FRAM Memory

FM22L16
4Mbit Asynchronous F-RAM Memory
Features
4Mbit Ferroelectric Nonvolatile RAM
• Organized as 256Kx16
• Configurable as 512Kx8 Using /UB, /LB
• 10¹⁴ Read/Write Cycles
• NoDelay™ Writes
• Page Mode Operation to 40MHz
• Advanced High-Reliability Ferroelectric Process
SRAM Compatible
• JEDEC 256Kx16 SRAM Pinout
• 55 ns Access Time, 110 ns Cycle Time
Advanced Features
• Software Programmable Block Write Protect
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 disadvantages, and system design
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_DD drops
below V_DD min. The memory is protected against an
inadvertent access and data corruption under this
condition. The device also features software-
controlled write protection. The memory array is
divided into 8 uniform blocks, each of which can be
individually write protected.
This product conforms specifications per the terms of the Ramtron
standard warranty. The product has completed Ramtron’s internal
qualification testing and has reached production status.
Rev. 3.0
May 2010
Superior to Battery-backed SRAM Modules
• No Battery Concerns
• Monolithic Reliability
• True Surface Mount Solution, No Rework Steps
• Superior for Moisture, Shock, and Vibration
Low Power Operation
• 2.7V – 3.6V Power Supply
• Low Current Mode (5µA) using ZZ pin
• Low Active Current (8 mA typ.)
Industry Standard Configuration
• Industrial Temperature -40° C to +85° C
• 44-pin “Green”/RoHS TSOP-II package
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
A4
1
A3
2
A2
3
A1
4
A0
5
CE
6
DQ0
7
DQ1
8
DQ2
9
DQ3
10
VDD
11
VSS
12
DQ4
13
DQ5
14
DQ6
15
DQ7
16
WE
17
A17
18
A16
19
A15
20
A14
21
A13
22
44
A5
43
A6
42
A7
41
OE
40
UB
39
LB
38
DQ15
37
DQ14
36
DQ13
35
DQ12
34
VSS
33
VDD
32
DQ11
31
DQ10
30
DQ9
29
DQ8
28
/ZZ
27
A8
26
A9
25
A10
24
A11
23
A12
Ordering Information
FM22L16-55-TG 55 ns access, 44-pin
“Green”/RoHS TSOP-II
FM22L16-55-TGTR 55 ns access, 44-pin
“Green”/RoHS TSOP-II,
Tape & Reel
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, [phone]
http://www.ramtron.com
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