STMicroelectronics M24M02-DRMN6TP

Overview

M24M02-DRMN6TP from STMicroelectronics is a 2-Mbit I²C-compatible EEPROM organized as 256 K × 8 bits, operating from 1.8 V to 5.5 V over –40 °C to +85 °C. It supports 1 MHz/400 kHz/100 kHz I²C bus modes, features a 256-byte page size, and includes an additional write-lockable identification page (exclusive to -DR variants) for secure parameter storage in industrial control and automotive subsystems.

For engineers reviewing the M24M02-DRMN6TP datasheet, M24M02-DRMN6TP pinout, M24M02-DRMN6TP application, or M24M02-DRMN6TP equivalent, key selection considerations include its dual-page architecture (main array + lockable ID page), WC-controlled full-array write protection, ECC-enabled read reliability across 4-byte groups, and SO8N ECOPACK2 packaging with verified 4M write cycles and 200-year data retention.

Technical Context

The M24M02-DRMN6TP implements an I²C slave interface with hardware-based write protection via the WC pin, which disables all write operations-including byte, page, and identification page writes-when driven high. Its internal address counter supports random, current-address, and sequential read modes, with automatic rollover at memory boundaries.

ECC logic operates transparently on 4-byte groups: single-bit error correction during reads, and coordinated write cycling across all four bytes in a group to enforce a shared 4-million-cycle endurance budget. The identification page (256 bytes) is accessible only via dedicated device-select codes (1011b) and supports permanent lock via a specific A10=1 command sequence.

Key Specifications

Pinout & Package

Package: SO8N ECOPACK2 (150 mil width), RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CM02-SSHD-T and M95M02-DRMN6TP, the M24M02-DRMN6TP uniquely combines I²C compatibility, ECC-protected reads, and a lockable identification page-making it the sole option among the three for applications requiring both secure parameter storage and hardware-enforced data integrity.

Availability

M24M02-DRMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and smart meter firmware parameter storage requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24M02-DRMN6TP 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 ICs, sensors, and memory products for industrial, automotive, and consumer markets.

The M24M02-DRMN6TP belongs to ST's M24 series of I²C EEPROMs, engineered specifically for robust, secure, and long-life nonvolatile storage in mission-critical embedded systems where data integrity and tamper resistance are mandatory.

FAQ

What is the function of the WC pin on the M24M02-DRMN6TP?

The WC (Write Control) pin is an active-high hardware write protect. When driven high, it disables all write operations-including byte write, page write, and identification page write-across the entire memory array. Writes remain enabled when WC is low or floating. This provides fail-safe protection against unintended overwrites during power-up, brown-out, or firmware errors.

How does the identification page differ between M24M02-DR and M24M02-R variants?

The identification page (256 bytes) exists only in -DR variants like the M24M02-DRMN6TP. It supports dedicated read/write commands using device-select code 1011b and can be permanently locked in read-only mode via a specific A10=1 command. The -R variant lacks this page entirely and has no lock functionality-making -DR the only choice for secure parameter storage.

Can the M24M02-DRMN6TP operate reliably at 1.8 V while supporting 1 MHz I²C communication?

Yes. The device is fully specified for 1.8 V to 5.5 V operation across –40 °C to +85 °C, and its 1 MHz I²C speed is guaranteed at minimum VCC = 1.8 V per DS7025 Rev 11 AC characteristics (Table 12). System designers must ensure SDA/SCL rise times meet t_r ≤ 100 ns and use appropriate pull-up resistors (e.g., 2.2 kΩ for 1.8 V, 3.3 V, or 5 V buses).

What happens to the internal address counter during sequential read after reaching the last memory address?

During sequential read, the internal address counter automatically increments after each byte output and rolls over from address 0x3FFFF (last address of 256 Kbyte array) back to 0x00000. This wraparound behavior is inherent to the device's architecture and enables continuous streaming without host-side address management-useful for circular buffer emulation or firmware signature verification loops.