This product conforms to specifications per the terms of the Ramtron

Ramtron International Corporation

standard warranty. The product has completed Ramtron’s internal

1850 Ramtron Drive, Colorado Springs, CO 80921

qualification testing and has reached production status.

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

www.ramtron.com

Rev. 3.0

Aug. 2006

Page 1 of 14

FM25L16

16Kb FRAM Serial 3V Memory

Features

16K bit Ferroelectric Nonvolatile RAM

•

Organized as 2,048 x 8 bits

•

Unlimited Read/Write Cycles

•

45 Year Data Retention

•

NoDelay™ Writes

•

Advanced High-Reliability Ferroelectric Process

Very Fast Serial Peripheral Interface - SPI

•

Up to 18 MHz Frequency

•

Direct Hardware Replacement for EEPROM

•

SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1)

Sophisticated Write Protection Scheme

•

Hardware Protection

•

Software Protection

Low Power Consumption

•

Low Voltage Operation 2.7-3.6V

•

1

µA Standby Current

Industry Standard Configuration

•

Industrial Temperature -40

°C to +85°C

•

“Green”/RoHS 8-pin SOIC Package

•

“Green”/RoHS 8-pin TDFN Package

•

TDFN Footprint Conforms to TSSOP-8

Description

The FM25L16 is a 16-kilobit nonvolatile memory

employing an advanced ferroelectric process. A

ferroelectric random access memory or FRAM is

nonvolatile and performs reads and writes like a

RAM. It provides reliable data retention for 45 years

while eliminating the complexities, overhead, and

system

level

reliability

problems

caused

by

EEPROM and other nonvolatile memories.

Unlike serial EEPROMs, the FM25L16 performs

write operations at bus speed. No write delays are

incurred. Data is written to the memory array

immediately after each byte has been transferred to

the device. The next bus cycle may commence

without the need for data polling. The product offers

virtually

unlimited

write

endurance,

orders

of

magnitude more endurance than EEPROM. FRAM

also exhibits much lower power during writes than

EEPROM.

These capabilities make the FM25L16 ideal for

nonvolatile memory applications requiring frequent

or rapid writes. Examples range from data collection,

where the number of write cycles may be critical, to

demanding industrial controls where the long write

time of EEPROM can cause data loss.

The FM25L16 provides substantial benefits to users

of

serial

EEPROM

as

a

hardware

drop-in

replacement. The FM25L16 uses the high-speed SPI

bus, which enhances the high-speed write capability

of FRAM technology. Device specifications are

guaranteed over an industrial temperature range of

-40°C to +85°C.

Pin Configuration

Pin Name

Function

/CS

Chip Select

/WP

Write Protect

/HOLD

Hold

SCK

Serial Clock

SI

Serial Data Input

SO

Serial Data Output

VDD

Supply Voltage

VSS

Ground

Ordering Information

FM25L16-G

“Green”/RoHS 8-pin SOIC

FM25L16-DG

“Green”/RoHS 8-pin TDFN

/CS

SO

/WP

VSS

VDD

/HOLD

SCK

SI

Top View

1

2

3

4

8

7

6

5

CS

SO

WP

VSS

VDD

HOLD

SCK

SI

1

2

3

4

8

7

6

5