M95256-W

NRND
Design Win

256 Kbit SPI bus EEPROM with high-speed clock

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Product overview

Description

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.

The M95256-DF, -DR or -DW (hereinafter referred to as M95256-Dx) offer an additional page, named the Identification page (64 bytes). The Identification page can be used to store sensitive application parameters that can be (later) permanently locked in read-only mode.

The SPI bus signals are C, D and Q, as shown in Figure 1 and Table 1. The device is selected when Chip select (S) is driven low. Communications with the device can be interrupted when the HOLD is driven low.

  • All features

    • Compatible with the serial peripheral interface (SPI) bus
    • Memory array
      • 256-Kbit (32 Kbytes) of EEPROM
      • Page size: 64 bytes
      • Additional write lockable page (Identification page)
    • Write time
      • Byte Write within 5 ms
      • Page Write within 5 ms
    • Write protect
      • quarter array
      • half array
      • 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
      • SO8N (ECOPACK2)
      • TSSOP8 (ECOPACK2)
      • UFDFPN8 (ECOPACK2)
      • WLCSP8 (ECOPACK2)

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - M95256-W

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
M95256-WDW6TP
NRND
TSSOP-8L Industrial Ecopack2
M95256-WMN6TP
NRND
SO8 Industrial Ecopack2

M95256-WDW6TP

Package:

TSSOP-8L

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

TSSOP-8L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

M95256-WMN6TP

Package:

SO8

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

SO8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

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M95256-WDW6TP

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