STMicroelectronics M24M02-DWMN3TP/K

Overview

M24M02-DWMN3TP/K from STMicroelectronics is an AEC-Q100 Grade 1 automotive serial EEPROM delivering 2 Mbit (256 Kbyte) nonvolatile storage over I²C at up to 1 MHz, with 256-byte page size, integrated ECC for data integrity, and a dedicated 256-byte lockable Identification Page used for device ID and application-critical parameters in engine control units.

For engineers reviewing the M24M02-DWMN3TP/K datasheet, M24M02-DWMN3TP/K pinout, M24M02-DWMN3TP/K application, or M24M02-DWMN3TP/K equivalent, key selection criteria include its -40 °C to 125 °C operating range, 2.5 V–5.5 V supply, 4 million write cycles at 25 °C, 100-year data retention, and WC-controlled hardware write protection.

Technical Context

The M24M02-DWMN3TP/K implements a true EEPROM core with embedded Error Correction Code logic across all 1024 pages, enabling reliable byte-alterable storage in harsh automotive environments. Its I²C slave interface supports standard, fast, and fast-plus modes (100 kHz/400 kHz/1 MHz), with Schmitt-triggered SCL/SDA inputs for robust noise immunity on electrically noisy vehicle buses.

Write control is enforced via the dedicated WC pin: when high, it inhibits all memory writes-including Identification Page-while still acknowledging device select and address bytes. The dual-page addressing scheme separates main array access (device type code 1010b) from Identification Page access (1011b), enabling secure parameter storage independent of user memory space.

Key Specifications

Pinout & Package

Package: SO8N (150 mil width, 3.9 mm × 4.9 mm), RoHS-compliant and halogen-free (ECOPACK2®).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CSW-02M-SSHM-T and BR24M02FJ-WE2, the M24M02-DWMN3TP/K uniquely combines AEC-Q100 Grade 1 qualification, hardware-lockable Identification Page, and embedded ECC in a drop-in SO8N package-making it the only option meeting full functional safety requirements for powertrain and ADAS calibration storage.

Availability

M24M02-DWMN3TP/K is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.

Supply support for M24M02-DWMN3TP/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, specializing in automotive, industrial, and power management ICs with strong IP in nonvolatile memory and embedded control.

The M24M02-DWMN3TP/K belongs to ST's automotive-grade serial EEPROM product line, designed specifically to meet AEC-Q100 reliability requirements and support secure, long-term parameter storage in safety-critical vehicle subsystems.

FAQ

What is the function of the WC pin on the M24M02-DWMN3TP/K?

The WC (Write Control) pin is a hardware-level write protection input. When driven high, it disables all write operations-including Byte Write, Page Write, and Identification Page Write-while still allowing device addressing and read access. This prevents accidental or malicious corruption of stored calibration data, and is commonly tied high after final programming in production.

Does the M24M02-DWMN3TP/K require external pull-up resistors on SDA and SCL lines?

Yes. SDA and SCL are open-drain outputs requiring external pull-up resistors to VCC. The datasheet specifies resistor values based on bus capacitance and target I²C speed: e.g., ≤2.2 kΩ for 1 MHz operation with ≤100 pF total bus capacitance. Incorrect pull-up values cause timing violations or communication failures.

How is the Identification Page secured against unauthorized modification?

The Identification Page can be permanently locked in read-only mode using the "Lock Identification Page" instruction. Once locked, no further writes-including erase or overwrite-are possible, even if WC is later pulled low. Lock status is verified via the "Read lock status" command, returning 0x00 for unlocked and 0xFF for locked.

Can the M24M02-DWMN3TP/K operate reliably at 5.5 V and 125 °C simultaneously?

Yes. The device is fully specified for concurrent operation at 5.5 V supply and +125 °C ambient temperature, with write endurance reduced to 100 k cycles and data retention guaranteed for 40 years under those conditions. All DC and AC parameters in Table 7 and Table 12 are validated across this combined stress point.