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  • The M24256-BW can operate with a supply voltage from 2.5 V to 5.5 V, the M24256-BR and M24256-DR can operate with a supply voltage from 1.8 V to 5.5 V, and the M24256-BF and M24256-DF can operate with a supply voltage from 1.7 V to 5.5 V. All these devices operate with a clock frequency of 1 MHz (or less), over an ambient temperature range of –40 °C / +85 °C.

    Key Features

    • Compatible with all I2C bus modes:
      • 1 MHz
      • 400 kHz
      • 100 kHz
    • Memory array:
      • 256 Kbit (32 Kbyte) of EEPROM
      • Page size: 64 byte
      • Additional Write lockable page (M24256-D order codes)
    • Single supply voltage and high speed:
      • 1 MHz clock from 1.7 V to 5.5 V
    • Write:
      • Byte Write within 5 ms
      • Page Write within 5 ms
    • Operating temperature range:
      • from -40 °C up to +85 °C
    • Random and sequential Read modes
    • Write protect of the whole memory array
    • Enhanced ESD/Latch-Up protection
    • More than 4 million Write cycles
    • More than 200-years data retention
    • Packages
      • SO8 ECOPACK2®
      • TSSOP8 ECOPACK2®
      • UFDFPN8 ECOPACK2®
      • WLCSP ECOPACK2®
      • Unsawn wafer (each die is tested)

Sample & Buy

Part Number
Replacement Product
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
More info
Order from Distributors
Order from ST
min
max
M24256BFKW20I/90 - WAFER Not Applicable -40 85
Active
- -
MORE INFO

ECCN (US):

EAR99

Country of Origin:

-

No availability of distributors reported, please contact our sales office
M24256-BFMC6TG - UFDFPN8 Tape And Reel -40 85
Active
0.2219 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

PHILIPPINES

Check Availability

Distributor availability ofM24256-BFMC6TG

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2837 1 Order Now
RS COMPONENTS EUROPE 5000 1 Order Now
FUTURE WORLDWIDE 5000 5000 Order Now
MOUSER WORLDWIDE 7753 1 Order Now
Farnell Element14 EUROPE 1116 1 Order Now

Distributor reported inventory date: 2019-09-18

Distributor Name

DIGIKEY

Stock

2837

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5000

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

5000

Min.Order

5000

Region

WORLDWIDE Order Now

MOUSER

Stock

7753

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1116

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-18

Buy now
M24256-BFDW6TP - TSSOP8 Tape And Reel -40 85
Active
0.2138 1000
MORE INFO

ECCN (US):

EAR99

Country of Origin:

CHINA

Check Availability

Distributor availability ofM24256-BFDW6TP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3328 1 Order Now
RS COMPONENTS EUROPE 3075 1 Order Now
Newark Element14 AMERICA 2605 0 Order Now
ARROW AMERICA 8000 4000 Order Now
MOUSER WORLDWIDE 3431 1 Order Now

Distributor reported inventory date: 2019-09-18

Distributor Name

DIGIKEY

Stock

3328

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3075

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

2605

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

8000

Min.Order

4000

Region

AMERICA Order Now

MOUSER

Stock

3431

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-18

Get sample

M24256BFKW20I/90

Replacement Product

-

Package

WAFER

Unit Price (US$)

*

Packing Type

Not Applicable

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

-

M24256-BFMC6TG

Replacement Product

-

Package

UFDFPN8

Unit Price (US$)

0.2219*

Distributor availability ofM24256-BFMC6TG

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2837 1 Order Now
RS COMPONENTS EUROPE 5000 1 Order Now
FUTURE WORLDWIDE 5000 5000 Order Now
MOUSER WORLDWIDE 7753 1 Order Now
Farnell Element14 EUROPE 1116 1 Order Now

Distributor reported inventory date: 2019-09-18

Distributor Name

DIGIKEY

Stock

2837

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5000

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

5000

Min.Order

5000

Region

WORLDWIDE Order Now

MOUSER

Stock

7753

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1116

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-18

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.2219

Quantity

1000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

M24256-BFDW6TP

Replacement Product

-

Package

TSSOP8

Unit Price (US$)

0.2138*

Distributor availability ofM24256-BFDW6TP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3328 1 Order Now
RS COMPONENTS EUROPE 3075 1 Order Now
Newark Element14 AMERICA 2605 0 Order Now
ARROW AMERICA 8000 4000 Order Now
MOUSER WORLDWIDE 3431 1 Order Now

Distributor reported inventory date: 2019-09-18

Distributor Name

DIGIKEY

Stock

3328

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

3075

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

2605

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

8000

Min.Order

4000

Region

AMERICA Order Now

MOUSER

Stock

3431

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-09-18

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Unit Price (US$)

0.2138

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS1766
      256-Kbit serial I²C bus EEPROM
      34.0
      838.19 KB
      PDF
      DS1766

      256-Kbit serial I²C bus EEPROM

    • Description Version Size Action
      AN4653
      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process
      1.0
      267.34 KB
      PDF
      AN2014
      How a designer can make the most of STMicroelectronics Serial EEPROMs
      10.1
      1.13 MB
      PDF
      AN971
      I2C communication between ST7 and M24CXX EEPROM
      1.7
      64.48 KB
      PDF
      AN1471
      What happens to the M24xxx I²C EEPROM if the I²C bus communication is stopped?
      4.4
      72.36 KB
      PDF
      AN4653

      Cycling endurance and data retention of high density EEPROM based on CMOS F8H process

      AN2014

      How a designer can make the most of STMicroelectronics Serial EEPROMs

      AN971

      I2C communication between ST7 and M24CXX EEPROM

      AN1471

      What happens to the M24xxx I²C EEPROM if the I²C bus communication is stopped?

    • Description Version Size Action
      TN1171
      Description of UFDFPN5, UFDFPN8 and WFDFPN8 for STMicroelectronics EEPROMs and recommendations for use
      3.0
      574.55 KB
      PDF
      TN0440
      M24256 and M24512 EEPROM devices: compatibility with the I²C-bus specification at 400 kHz and 1 MHz
      2.1
      157.46 KB
      PDF
      TN1171

      Description of UFDFPN5, UFDFPN8 and WFDFPN8 for STMicroelectronics EEPROMs and recommendations for use

      TN0440

      M24256 and M24512 EEPROM devices: compatibility with the I²C-bus specification at 400 kHz and 1 MHz

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      IBIS model I2C M24xxx Standard EEPROM (-40 degC to 85 degC) 4.0
      5.86 MB
      ZIP
      IBIS model SPI M95xxx Standard EEPROM (-40 degC to 85 degC) 5.0
      4.92 MB
      ZIP
      Verilog model I2C EEPROM M24XXX 2.0
      18.97 KB
      ZIP
      Verilog model SPI EEPROM M95XXX 2.2
      57.49 KB
      ZIP

      IBIS model I2C M24xxx Standard EEPROM (-40 degC to 85 degC)

      IBIS model SPI M95xxx Standard EEPROM (-40 degC to 85 degC)

      Verilog model I2C EEPROM M24XXX

      Verilog model SPI EEPROM M95XXX

Presentations & Training Material

    • Description Version Size Action
      EEPROM general presentation 1.0
      627.51 KB
      PDF
      EEPROM in WLCSP July 2016 1.4
      281.42 KB
      PDF
      I2C EEPROM in DFN5 small package 1.0
      555.19 KB
      PDF

      EEPROM general presentation

      EEPROM in WLCSP July 2016

      I2C EEPROM in DFN5 small package

Publications and Collaterals

    • Description Version Size Action
      EEPROM in Ultra-small packages 1.0
      1.22 MB
      PDF
      Serial EEPROM 1.0
      1.73 MB
      PDF

      EEPROM in Ultra-small packages

      Serial EEPROM

    • Description Version Size Action
      EEPROM selection guide 2.0
      843.56 KB
      PDF

      EEPROM selection guide

    • Description Version Size Action
      Products and solutions for solar energy 1.0
      1.29 MB
      PDF
      Semiconductor solutions for healthcare applications 1.0
      665.18 KB
      PDF
      Smart grid distribution and smart meters - Energy-efficient solutions 2.0
      1.58 MB
      PDF

      Products and solutions for solar energy

      Semiconductor solutions for healthcare applications

      Smart grid distribution and smart meters - Energy-efficient solutions

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M24256-BFDW6TP
Active
TSSOP8 Industrial Ecopack2
M24256-BFMC6TG
Active
UFDFPN8 Industrial Ecopack2
M24256BFKW20I/90
Active
WAFER Industrial N/A

M24256-BFDW6TP

Package:

TSSOP8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSSOP8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M24256-BFMC6TG

Package:

UFDFPN8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M24256BFKW20I/90

Package:

WAFER

Material Declaration**:

PDF XML

Marketing Status

Active

Package

WAFER

Grade

Industrial

RoHS Compliance Grade

N/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.