FM24CL04-GTR Ramtron, FM24CL04-GTR Datasheet

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FM24CL04-GTR

Manufacturer Part Number
FM24CL04-GTR
Description
memory, soic, ram, Memory, Semiconductors and Actives, bit, serial
Manufacturer
Ramtron
Datasheet
FM24CL04
4Kb FRAM Serial Memory
Features
4K bit Ferroelectric Nonvolatile RAM
Fast Two-wire Serial Interface
Description
The FM24CL04 is a 4-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 FM24CL04 performs
write operations at bus speed. No write delays are
incurred. Data is written to the memory array in the
cycle after it has been successfully transferred to the
device. The next bus cycle may commence
immediately.
These capabilities make the FM24CL04 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
combination of features allows more frequent data
writing with less overhead for the system.
The FM24CL04 provides substantial benefits to users
of serial EEPROM, yet these benefits are available in
a hardware drop-in replacement. The FM24CL04 is
available in an industry standard 8-pin package using
a
guaranteed over an industrial temperature range of
-40°C to +85°C.
This product conforms to 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
March 2005
two-wire
Organized as 512 x 8 bits
Unlimited Read/Writes
45 Year Data Retention
NoDelay™ Writes
Advanced High-Reliability Ferroelectric Process
Up to 1 MHz maximum bus frequency
Direct hardware replacement for EEPROM
protocol.
The
specifications
are
Industry Standard Configuration
Pin Configuration
Pin Names
A1-A2
SDA
SCL
WP
VSS
VDD
Ordering Information
FM24CL04-S
FM24CL04-G
Low Power Operation
VSS
2.7V to 3.65V operation
75 A Active Current (100 kHz) @ 3V
1 A Standby Current
Industrial Temperature -40 C to +85 C
8-pin SOIC (-S)
“Green” 8-pin SOIC (-G)
NC
A1
A2
1850 Ramtron Drive, Colorado Springs, CO 80921
Function
Device Select Address 1 and 2
Serial Data/Address
Serial Clock
Write Protect
Ground
Supply Voltage 3V
1
2
3
4
8-pin SOIC
“Green” 8-pin SOIC
Ramtron International Corporation
(800) 545-FRAM, (719) 481-7000
8
7
6
5
VDD
WP
SCL
SDA
www.ramtron.com
Page 1 of 11

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FM24CL04-GTR Summary of contents

Page 1

... The FM24CL04 provides substantial benefits to users of serial EEPROM, yet these benefits are available in a hardware drop-in replacement. The FM24CL04 is available in an industry standard 8-pin package using a two-wire protocol. ...

Page 2

... Write Protect: When WP is high the entire array is write protected. When WP is low, all addresses may be written. This pin is internally pulled down connect VDD Supply Supply Voltage VSS Supply Ground Rev. 3.0 March 2005 Address Latch Figure 1. Block Diagram FM24CL04 128 x 32 FRAM Array 8 Data Latch Page ...

Page 3

... This is explained in more detail in the interface section below. Users can expect several obvious system benefits from the FM24CL04 due to its fast write cycle and high endurance as compared with EEPROM. However there are less obvious benefits as well. For example in a high noise environment, the fast-write operation is less susceptible to corruption than an EEPROM since it is completed quickly ...

Page 4

... When a read operation is complete and no more data is needed, the receiver must not acknowledge acknowledges the last byte, this will cause the FM24CL04 to attempt to drive the bus on the next clock while the master is sending a new command such as a Stop command. Slave Address The first byte that the FM24CL04 expects after a start condition is the slave address ...

Page 5

... After all address information has been transmitted, data transfer between the bus master and the FM24CL04 can begin. For a read operation the FM24CL04 will place 8 data bits on the bus then wait for an acknowledge. If the acknowledge occurs, the next sequential byte will be transferred. If the acknowledge is not sent, the read operation is concluded ...

Page 6

... FM24CL04 should read out the next sequential byte. There are four ways to properly terminate a read operation. Failing to properly terminate the read will most likely create a bus contention as the FM24CL04 Rev. 3.0 March 2005 Address & Data 0 A Word Address Acknowledge Figure 5 ...

Page 7

... Rev. 3.0 March 2005 Figure 7. Current Address Read Figure 8. Sequential Read Figure 9. Selective (Random) Read FM24CL04 Page ...

Page 8

... Std JESD22-A114-B) (JEDEC Std JESD22-A115-A) = 2.7V to 3.65V unless otherwise specified) DD Min 2 other inputs -0. Stop command issued FM24CL04 Ratings -1.0V to +5.0V -1.0V to +5.0V and V < V +1. - 125 C 300 C 3kV 300V MSL-1 Typ Max Units Notes 3. 150 ...

Page 9

... Min 0 100 0 4.7 1.3 4.0 0.6 3 4.7 1.3 4.0 0.6 4.7 0 250 100 1000 300 4.0 0 3V) DD Max Units FM24CL04 Max Min Max Units Notes 400 0 1000 kHz 0.6 s 0.4 s 0.9 0.55 s 0.5 s 0. 100 ns 300 300 ns 1 300 100 ...

Page 10

... Write timing parameters apply to slave address, word address, and write data bits. Functional relationships are illustrated in the relevant data sheet sections. These diagrams illustrate the timing parameters only. Read Bus Timing Write Bus Timing Data Retention (V = 2.7V to 3.65V, +85°C) DD Parameter Data Retention Rev. 3.0 March 2005 Min Units Notes 45 Years FM24CL04 Page ...

Page 11

... SOIC Package Marking Scheme Legend: XXXX= part number, P= package type LLLLLLL= lot code XXXXXXX-P LLLLLLL RIC=Ramtron Int’l Corp, YY=year, WW=work week RICYYWW Example: FM24CL04, Standard SOIC package, Year 2004, Work Week 39 FM24CL04-S A40003S RIC0439 Rev. 3.0 March 2005 Recommended PCB Footprint 3.90 ...

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