FM24C64_05 RAMTRON [Ramtron International Corporation], FM24C64_05 Datasheet

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FM24C64_05

Manufacturer Part Number
FM24C64_05
Description
64Kb FRAM Serial Memory
Manufacturer
RAMTRON [Ramtron International Corporation]
Datasheet
FM24C64
64Kb FRAM Serial Memory
Features
64K bit Ferroelectric Nonvolatile RAM
Fast Two-wire Serial Interface
Description
The FM24C64 is a 64-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
EEPROM and other nonvolatile memories.
The FM24C64 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. The FM24C64 is
capable of supporting 10
million times more write cycles than EEPROM.
These capabilities make the FM24C64 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
writes with less overhead for the system.
The FM24C64 provides substantial benefits to users
of serial EEPROM, yet these benefits are available in
a hardware drop-in replacement. The FM24C64 is
available in an industry standard 8-pin SOIC package
using a two-wire protocol. The specifications are
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
Mar. 2005
Organized as 8,192 x 8 bits
High Endurance 1 Trillion (10
45 Year Data Retention
NoDelay™ Writes
Advanced High-Reliability Ferroelectric Process
Up to 1 MHz maximum bus frequency
Direct hardware replacement for EEPROM
Supports legacy timing for 100 kHz & 400 kHz
level
reliability
12
problems
read/write cycles, or a
12
) Read/Writes
caused
by
Industry Standard Configuration
Pin Configuration
Low Power Operation
Pin Names
A0-A2
SDA
SCL
WP
VSS
VDD
Ordering Information
FM24C64-S
FM24C64-G
VSS
5V operation
150 A Active Current (100 kHz)
10 A Standby Current
Industrial Temperature -40 C to +85 C
8-pin SOIC (-S)
“Green” 8-pin SOIC (-G)
A0
A1
A2
1850 Ramtron Drive, Colorado Springs, CO 80921
1
2
3
4
Function
Device Select Address
Serial Data/address
Serial Clock
Write Protect
Ground
Supply Voltage 5V
“Green” 8-pin SOIC
8-pin SOIC
Ramtron International Corporation
(800) 545-FRAM, (719) 481-7000
8
7
6
5
VDD
WP
SCL
SDA
www.ramtron.com
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FM24C64_05 Summary of contents

Page 1

FM24C64 64Kb FRAM Serial Memory Features 64K bit Ferroelectric Nonvolatile RAM Organized as 8,192 x 8 bits 12 High Endurance 1 Trillion (10 ) Read/Writes 45 Year Data Retention NoDelay™ Writes Advanced High-Reliability Ferroelectric Process Fast Two-wire Serial Interface Up ...

Page 2

Counter SDA Serial to Parallel Converter SCL WP Control Logic A0-A2 Pin Description Pin Name I/O Pin Description A0-A2 Input Address 2-0: These pins are used to select one devices of the same type on the ...

Page 3

Overview The FM24C64 is a serial FRAM memory. The memory array is logically organized as a 8,192 x 8 bit memory array and is accessed using an industry standard two-wire interface. Functional operation of the FRAM is similar to serial ...

Page 4

Stop Condition A Stop condition is indicated when the bus master drives SDA from low to high while the SCL signal is high. All operations must end with a Stop condition operation is pending when a stop is ...

Page 5

Device Slave Select R Figure 4. Slave Address Addressing Overview After the FM24C64 (as receiver) acknowledges the device address, the master can place the memory address ...

Page 6

By Master Start DEVICE ADDRESS S By FM24C64 By Master Start DEVICE ADDRESS FM24C64 Read Operation There are two basic types of read operations. They are current address read and selective address read current ...

Page 7

By Master By FM24C64 Address By Master Start DEVICE ADDRESS S By FM24C64 By Master Start DEVICE ADDRESS ADDRESS MSB FM24C64 Endurance Internally, a FRAM operates with a read and restore mechanism. Therefore, ...

Page 8

Electrical Specifications Absolute Maximum Ratings Symbol V Power Supply Voltage with respect Voltage on any signal pin with respect Storage temperature STG T Lead temperature (Soldering, 10 seconds) LEAD V Electrostatic Discharge ...

Page 9

AC Parameters ( Symbol Parameter f SCL Clock Frequency SCL t Clock Low Period LOW t Clock High Period HIGH t SCL Low to SDA Data Out Valid AA t Bus ...

Page 10

AC Test Conditions Input Pulse Levels Input rise and fall times Input and output timing levels Diagram Notes All start and stop timing parameters apply to both read and write cycles. Clock specifications are identical for read and write cycles. ...

Page 11

Mechanical Drawing 8-pin SOIC (JEDEC Standard MS-012 variation AA) Pin 1 4.90 0.10 ± 1.27 0.33 0.51 Refer to JEDEC MS-012 for complete dimensions and notes. All dimensions in millimeters. SOIC Package Marking Scheme Legend: XXXX= part number, P= package ...

Page 12

Revision History Revision Date 0.1 10/4/99 1.0 12/7/99 1.1 7/2/00 2.1 1/22/02 2.2 4/26/02 2.3 8/5/03 2.4 3/17/04 3.0 3/29/05 Rev. 3.0 Mar. 2005 Summary Initial Release Changed to Preliminary status. Removed Endurance chart. Changed to Production status. Added clarification ...

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