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Home > Products > Integrated Circuits (ICs) > Memory > Memory

STMicroelectronics M24256-DRDW8TP/K

Name: M24256-DRDW8TP/K
Brand: STMicroelectronics
SKU: M24256-DRDW8TP/K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M24256-DRDW8TP/K

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: M24256-DRDW8TP/K.pdf

Description:: IC EEPROM 256KBIT I2C 8TSSOP

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Product details

Overview

M24256-DRDW8TP/K from STMicroelectronics is a 256-Kbit (32 Kbyte) I²C-compatible serial EEPROM with 64-byte page size, 1.7–5.5 V supply range, and extended industrial temperature operation up to +105 °C. It features an embedded ECC logic for enhanced data integrity, a dedicated 64-byte lockable Identification Page for device ID and application parameters, and supports I²C bus speeds up to 1 MHz. It is used in automotive body control modules for storing calibration data and fault logs.

For engineers reviewing the M24256-DRDW8TP/K datasheet, M24256-DRDW8TP/K pinout, M24256-DRDW8TP/K application, or M24256-DRDW8TP/K equivalent, key selection criteria include write endurance at high temperature, identification page lockability, I²C speed compatibility (1 MHz/400 kHz/100 kHz), and AEC-Q100 Grade 2 qualification for automotive use.

Technical Context

The device operates as a slave on the I²C bus using standard Start/Stop conditions and 7-bit addressing with three Chip Enable inputs (E2–E0) enabling up to eight devices on one bus. Device select codes differentiate between main memory (1010b) and the Identification Page (1011b), each requiring separate addressing schemes per Table 3.

Internal architecture includes a 512-page × 64-byte memory array with automatic address incrementing post-write, Schmitt-triggered inputs for noise immunity, and a dedicated Write Control (WC) pin that globally inhibits writes when driven high. The Identification Page supports read, write, and permanent lock operations independent of main array access.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory capacity	256 Kbit (32 Kbytes), organized as 512 pages × 64 bytes - enables efficient block-level firmware parameter storage.
I²C speed support	1 MHz / 400 kHz / 100 kHz - ensures interoperability with legacy and high-speed microcontrollers without bus timing redesign.
Write endurance	900 k cycles at 105 °C - guarantees reliable reprogramming in under-hood automotive environments over product lifetime.
Data retention	50+ years at 105 °C - maintains calibration and configuration data integrity across full automotive thermal lifecycle.
Supply voltage	1.7 V to 5.5 V - supports direct interface with 1.8 V, 3.3 V, and 5 V logic domains without level-shifting circuitry.
Temperature range	−40 °C to +105 °C, AEC-Q100 Grade 2 qualified - meets automotive cabin and powertrain module ambient requirements.
ESD protection	4000 V HBM - reduces risk of field failure during handling and system integration in manufacturing.

Pinout & Package

TSSOP8 (DW) package: 8-lead thin shrink small outline, 3 mm × 6.4 mm body, 0.65 mm pitch, RoHS-compliant and halogen-free (ECOPACK2®).

Pin/Terminal	Circuit Role	Design Meaning
E2, E1, E0	Chip Enable address inputs	Set 3-bit hardware address (b2–b0) for multi-device I²C bus addressing; floating = logic low.
SDA	Serial Data bidirectional line	Open-drain I/O for I²C data transfer; requires external pull-up resistor to VCC.
SCL	Serial Clock input	Master-generated clock for synchronous data sampling; Schmitt-triggered for noise immunity.
WC	Write Control input	Global write inhibit: high = all memory writes blocked, including Identification Page; low or floating = enabled.
VSS	Ground reference	System ground return path for all internal circuitry and I/O signals.
VCC	Power supply input	Single-supply rail supporting 1.7–5.5 V; internally regulated for EEPROM core operation.

Key Features

Feature	Design Value
Dedicated Identification Page	64-byte area with factory-programmed ST device ID (0x20, 0xE0, 0x0F) and user-writable/application-lockable space for secure calibration or security keys.
Embedded ECC logic	On-the-fly error correction across all 32 Kbytes - improves bit reliability without software overhead or external redundancy.
Fast write cycle	≤4 ms for both byte and page writes - minimizes bus occupancy and enables responsive parameter updates in real-time systems.
Extended voltage range	1.7–5.5 V operation - eliminates need for external voltage regulators in mixed-voltage automotive ECUs.
Robust I/O interface	Schmitt-trigger inputs on SCL/SDA/WC/E2–E0 - suppresses noise-induced glitches in electrically noisy vehicle harness environments.

Applications

Automotive Body Control Module

Industrial PLC Configuration Storage

Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across ignition cycles in premium vehicles.

IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed via I²C during boot and runtime; retains data through 12 V battery disconnect.

Use Value: Enables personalized user settings persistence without backup capacitors or supercapacitors, leveraging 50-year data retention at 105 °C.

Use Scenario: Holding I/O mapping tables, PID tuning constants, and firmware update flags in modular automation controllers.

IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM Cortex-M7 host MCU; updated only during commissioning or maintenance mode.

Use Value: Eliminates need for external SPI flash or FRAM; 900 k write cycles at 85 °C ensures >10-year field reliability under periodic reconfiguration.

Medical Infusion Pump Calibration

Smart Energy Meter Firmware Patch Storage

Use Scenario: Recording flow rate calibration coefficients, sensor offset corrections, and usage history in Class II medical devices.

IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory holding FDA-required traceable calibration data; accessed via isolated I²C bus.

Use Value: AEC-Q100 Grade 2 qualification provides proven reliability foundation; ECC prevents silent data corruption in life-support systems.

Use Scenario: Storing encrypted firmware patch payloads and version metadata for OTA updates in utility-grade electricity meters.

IC Role / Device Role / Timing Role: Secure boot adjunct memory holding signed update fragments; accessed only during authenticated firmware validation phase.

Use Value: Identification Page lock capability ensures immutable device identity binding to cryptographic keys, preventing cloning or spoofing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C256C-SSHL-T	256 Kbit I²C EEPROM, max 400 kHz speed, −40 °C to +85 °C, no Identification Page or ECC.	Lacks AEC-Q100 qualification and high-temp endurance; suitable for commercial-grade consumer electronics only.	Select only if operating temperature stays ≤85 °C and ECC/ID page features are unnecessary.
BR24G256FJ-3GE2	256 Kbit I²C EEPROM, 1 MHz support, −40 °C to +105 °C, but no dedicated Identification Page or factory ID fields.	Missing lockable ID page and ST-specific device identification - limits traceability and secure parameter binding.	Prefer when cost sensitivity outweighs need for factory-programmed ID and permanent lock functionality.

Compared with AT24C256C-SSHL-T and BR24G256FJ-3GE2, the M24256-DRDW8TP/K uniquely combines AEC-Q100 Grade 2, 105 °C endurance, ECC, and a lockable Identification Page - making it the only choice for safety-critical automotive and industrial applications requiring certified long-term data integrity.

Availability

M24256-DRDW8TP/K is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC configuration storage, medical infusion pump calibration, and smart energy meter firmware patch storage requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24256-DRDW8TP/K includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and memory solutions for automotive, industrial, and consumer markets.

The M24256-DRE series belongs to ST's automotive-qualified serial EEPROM product line, engineered specifically for mission-critical data storage in harsh environments where reliability, longevity, and functional safety compliance are mandatory.

FAQ

What is the function of the WC pin on the M24256-DRDW8TP/K?

The WC (Write Control) pin is a hardware-level global write inhibit. When driven high, it blocks all write operations-including Byte Write, Page Write, and Identification Page Write-regardless of I²C command sequence. Writes resume only when WC is pulled low or left floating. This feature prevents accidental overwrites during power transients or firmware errors.

Does the M24256-DRDW8TP/K support 1 MHz I²C communication in all temperature ranges?

Yes, the M24256-DRDW8TP/K fully supports 1 MHz I²C operation across its entire rated temperature range (−40 °C to +105 °C) and supply voltage range (1.7 V to 5.5 V), as confirmed by AC characteristics Tables 11 and 12 in the official datasheet (DocID027418 Rev 2). No derating is required.

How is the Identification Page secured against unauthorized modification?

The Identification Page can be permanently locked in read-only mode via a dedicated "Lock Identification Page" instruction. Once locked, no further writes-including erase or overwrite-are possible, even if WC is low. Lock status is readable via "Read lock status" command, and the lock operation is irreversible and hardware-enforced.

Is the M24256-DRDW8TP/K pin-compatible with other STMicroelectronics EEPROMs in TSSOP8?

Yes, the M24256-DRDW8TP/K shares identical TSSOP8 (DW) pinout and footprint with ST's M24128-DRE, M24512-DRE, and M24C02-DRE families. All use the same E2/E1/E0/SDA/SCL/WC/VSS/VCC arrangement, enabling drop-in replacement within the same density and feature class-subject to software-level I²C address and timing validation.

M24256-DRDW8TP/K Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 256Kbit

Memory Organization:: 32K x 8

Memory Interface:: I2C

Clock Frequency:: 1 MHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 450 ns

Voltage - Supply:: 1.8V ~ 5.5V

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

M24256-DRDW8TP/K FAQ

1.How can I place an order for M24256-DRDW8TP/K through Aetrix?

Please submit a Request for Quotation (RFQ) for M24256-DRDW8TP/K on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for M24256-DRDW8TP/K reliable?

The price and inventory of M24256-DRDW8TP/K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24256-DRDW8TP/K is usually 5 days.

3.What payment methods are accepted for M24256-DRDW8TP/K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24256-DRDW8TP/K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M24256-DRDW8TP/K?

M24256-DRDW8TP/K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M24256-DRDW8TP/K order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for M24256-DRDW8TP/K?

For technical support, including M24256-DRDW8TP/K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24256-DRDW8TP/K requirements.

6.How does Aetrix verify that M24256-DRDW8TP/K is sourced from the original manufacturer or authorized distributors?

All M24256-DRDW8TP/K products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M24256-DRDW8TP/K meets industry standards.

7.What is the process for return or replacement of M24256-DRDW8TP/K?

All M24256-DRDW8TP/K units undergo pre-shipment inspection (PSI). If there is an issue with M24256-DRDW8TP/K, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The M24256-DRDW8TP/K part is unused and in its original packaging.

Return procedure for M24256-DRDW8TP/K:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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