Preliminary
FM28V020
256Kbit Bytewide F-RAM Memory
Features
256Kbit Ferroelectric Nonvolatile RAM
•
Organized as 32Kx8
•
10
14
Read/Write Cycles
•
NoDelay™ Writes
•
Page Mode Operation to 33MHz
•
Advanced High-Reliability Ferroelectric Process
Superior to Battery-backed SRAM Modules
•
No battery concerns
•
Monolithic reliability
•
True surface mount solution, no rework steps
•
Superior for moisture, shock, and vibration
•
Resistant to negative voltage undershoots
SRAM Replacement
•
JEDEC 32Kx8 SRAM pinout
•
60 ns Access Time, 90 ns Cycle Time
Low Power Operation
•
2.0V – 3.6V Power Supply
•
Standby Current 90
µA
(typ)
•
Active Current 7 mA (typ)
Industry Standard Configurations
•
Industrial Temperature -40° C to +85° C
•
28-pin “Green”/RoHS SOIC (-SG)
•
32-pin “Green”/RoHS TSOP (-TG)
General Description
The FM28V020 is a 32K x 8 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 virtually unlimited write
endurance make F-RAM superior to other types of
memory.
In-system operation of the FM28V020 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 FM28V020 ideal
for nonvolatile memory applications requiring
frequent or rapid writes in the form of an SRAM.
Device specifications are guaranteed over the
industrial temperature range -40°C to +85°C.
Pin Configuration
NC
OE
A11
A9
A8
A13
WE
VDD
A14
A12
A7
A6
A5
A4
A3
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
NC
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
NC
TSOP-I
Ordering Information
FM28V020-SG
28-pin “Green”/RoHS SOIC
FM28V020-SGTR
28-pin “Green”/RoHS SOIC,
Tape & Reel
FM28V020-TG
32-pin “Green”/RoHS TSOP
FM28V020-TGTR
32-pin “Green”/RoHS TSOP,
Tape & Reel
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.1
Sept. 2009
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
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RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
