Preliminary

This is a product that has fixed target specifications but are subject

Ramtron International Corporation

to change pending characterization results.

1850 Ramtron Drive, Colorado Springs, CO 80921

(800) 545-FRAM, (719) 481-7000

Rev. 1.1

http://www.ramtron.com

Sept. 2009

Page 1 of 14

FM28V020

256Kbit Bytewide F-RAM Memory

Features

256Kbit Ferroelectric Nonvolatile RAM

•

Organized as 32Kx8

•

10

•

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

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

TSOP-I

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

NC

OE

A11

A9

A8

A13

WE

VDD

A14

A12

A7

A6

A5

A4

A3

NC

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