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  • The M95256 devices are Electrically Erasable PROgrammable Memories (EEPROMs) organized as 32768 x 8 bits, accessed through the SPI bus.

    The M95256-W can operate with a supply voltage from 2.5 V to 5.5 V, the M95256-R can operate with a supply voltage from 1.8 V to 5.5 V and the M95256-DF can operate with a supply voltage from 1.7 V to 5.5 V, over an ambient temperature range of -40 °C / +85 °C.

    Key Features

    • Compatible with the Serial Peripheral Interface (SPI) bus
    • Memory array
      • 256 Kb (32 Kbytes) of EEPROM
      • Page size: 64 bytes
    • Write
      • Byte Write within 5 ms
      • Page Write within 5 ms
    • Additional Write lockable page (Identification page)
    • Write Protect: quarter, half or whole memory array
    • High-speed clock: 20 MHz
    • Single supply voltage:
      • 2.5 V to 5.5 V for M95256-W
      • 1.8 V to 5.5 V for M95256-R
      • 1.7 V to 5.5 V for M95256-DF
    • Operating temperature range: from -40 °C up to +85 °C
    • Enhanced ESD protection
    • More than 4 million Write cycles
    • More than 200-year data retention
    • Packages:
      • SO8 (ECOPACK2®)
      • TSSOP8 (ECOPACK2®)
      • UFDFPN8 (ECOPACK2®)
      • WLCSP (ECOPACK2®)

Recommended for you

Mobile Applications

    • Part Number

      Serial EEPROMs product finder for Android and iOS

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS4712
      256-Kbit serial SPI bus EEPROM with high-speed clock
      21.0
      929.08 KB
      PDF
      DS4712

      256-Kbit serial SPI bus EEPROM with high-speed clock

    • 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
      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

    • Description Version Size Action
      TN1171
      Description of UFDFPN5, UFDFPN8 and WFDFPN8 for STMicroelectronics EEPROMs and recommendations for use
      3.0
      574.55 KB
      PDF
      TN0991
      Description of WLCSP for STMicroelectronics EEPROMs and recommendations for use
      2.2
      721.8 KB
      PDF
      TN1171

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

      TN0991

      Description of WLCSP for STMicroelectronics EEPROMs and recommendations for use

    • Description Version Size Action
      ES0371
      M95256-R and M95256-DF package mechanical data modifications
      1.0
      230.55 KB
      PDF
      ES0371

      M95256-R and M95256-DF package mechanical data modifications

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      3D_MODEL_EEPROM_ALL_PACKAGES 1.0
      160.28 KB
      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

      3D_MODEL_EEPROM_ALL_PACKAGES

      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 in WLCSP July 2016 1.4
      281.42 KB
      PDF
      I2C EEPROM in DFN5 small package 1.0
      555.19 KB
      PDF
      Standard Serial EEPROM presentation 1.0
      545.36 KB
      PDF
      World first 4Mbit SPI EEPROM presentation 1.0
      335.78 KB
      PDF

      EEPROM in WLCSP July 2016

      I2C EEPROM in DFN5 small package

      Standard Serial EEPROM presentation

      World first 4Mbit SPI EEPROM presentation

Publications and Collaterals

    • Description Version Size Action
      Serial EEPROM 1.0
      1.73 MB
      PDF

      Serial EEPROM

    • 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

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M95256-DFCS6TP/K
Active
WLCSP Industrial Ecopack2
M95256-DFDW6TP
Active
TSSOP8 Industrial Ecopack2
M95256-DFMC6TG
Active
UFDFPN8 Industrial Ecopack2
M95256-DFMN6TP
Active
SO8 Industrial Ecopack2
M95256DFKW20I/90
Active
WAFER Industrial N/A

M95256-DFCS6TP/K

Package:

WLCSP

Material Declaration**:

PDF XML

Marketing Status

Active

Package

WLCSP

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M95256-DFDW6TP

Package:

TSSOP8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSSOP8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M95256-DFMC6TG

Package:

UFDFPN8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFDFPN8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M95256-DFMN6TP

Package:

SO8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M95256DFKW20I/90

Package:

WAFER

Material Declaration**:

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Replacement Product
Package
Packing Type
Temperature (°C) Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
M95256-DFCS6TP/K Available at 2 distributors

Distributor availability ofM95256-DFCS6TP/K

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2216 1 Order Now
MOUSER WORLDWIDE 2450 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

DIGIKEY

Stock

2216

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2450

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-08

Get sample - WLCSP Tape And Reel -40 85
Active
EAR99 SINGAPORE 0.4145 / 1k
M95256-DFMC6TG Available at 3 distributors

Distributor availability ofM95256-DFMC6TG

Distributor Name
Region Stock Min. Order Third party link
P&S ASIA/PACIFIC 375 1 Order Now
MOUSER WORLDWIDE 3950 1 Order Now
Farnell Element14 EUROPE 5024 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

P&S

Stock

375

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3950

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5024

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Get sample - UFDFPN8 Tape And Reel -40 85
Active
EAR99 PHILIPPINES 0.404 / 1k
M95256-DFMN6TP Available at 3 distributors

Distributor availability ofM95256-DFMN6TP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1436 1 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

DIGIKEY

Stock

1436

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Get sample - SO8 Tape And Reel -40 85
Active
EAR99 CHINA 0.3342 / 1k
M95256-DFDW6TP Available at 1 distributors

Distributor availability ofM95256-DFDW6TP

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 946 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

MOUSER

Stock

946

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-08

Get sample - TSSOP8 Tape And Reel -40 85
Active
EAR99 CHINA 0.3465 / 1k
M95256DFKW20I/90 No availability of distributors reported, please contact our sales office - WAFER Not Applicable -40 85
Active
EAR99 FRANCE 0.3287 / 1k

M95256-DFCS6TP/K

Replacement Product

-

Package

WLCSP

Budgetary Price (US$)*/Qty

0.4145 / 1k

Distributor availability ofM95256-DFCS6TP/K

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2216 1 Order Now
MOUSER WORLDWIDE 2450 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

DIGIKEY

Stock

2216

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2450

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-08

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.4145 / 1k

ECCN (US)

EAR99

Country of Origin

SINGAPORE

M95256-DFMC6TG

Replacement Product

-

Package

UFDFPN8

Budgetary Price (US$)*/Qty

0.404 / 1k

Distributor availability ofM95256-DFMC6TG

Distributor Name
Region Stock Min. Order Third party link
P&S ASIA/PACIFIC 375 1 Order Now
MOUSER WORLDWIDE 3950 1 Order Now
Farnell Element14 EUROPE 5024 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

P&S

Stock

375

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3950

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5024

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.404 / 1k

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

M95256-DFMN6TP

Replacement Product

-

Package

SO8

Budgetary Price (US$)*/Qty

0.3342 / 1k

Distributor availability ofM95256-DFMN6TP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1436 1 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

DIGIKEY

Stock

1436

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

2500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-08

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3342 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

M95256-DFDW6TP

Replacement Product

-

Package

TSSOP8

Budgetary Price (US$)*/Qty

0.3465 / 1k

Distributor availability ofM95256-DFDW6TP

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 946 1 Order Now

Distributor reported inventory date: 2020-07-08

Distributor Name

MOUSER

Stock

946

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-08

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3465 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

M95256DFKW20I/90

Replacement Product

-

Package

WAFER

Budgetary Price (US$)*/Qty

0.3287 / 1k

Packing Type

Not Applicable

Operating Temperature (°C)

(min)

-40

(max)

85

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.3287 / 1k

ECCN (US)

EAR99

Country of Origin

FRANCE

(*) 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