STMicroelectronics M24M02E-FMN6TP

Overview

M24M02E-FMN6TP from STMicroelectronics is a 2-Mbit I²C-compatible EEPROM organized as 256 K × 8 bits, operating from 1.6 V to 5.5 V with 1 MHz Fast-mode Plus support, -40 °C to +85 °C temperature range, and 256-byte page write capability. It integrates configurable device address (CDA), software write protection (SWP), and a lockable 256-byte identification page for secure parameter storage in industrial control modules.

For engineers reviewing the M24M02E-FMN6TP datasheet, M24M02E-FMN6TP pinout, M24M02E-FMN6TP application, or M24M02E-FMN6TP equivalent, key selection criteria include I²C bus mode compatibility (1 MHz/400 kHz/100 kHz), hardware/software write protection granularity, identification page lockability, and ECOPACK2-compliant SO8N package footprint.

Technical Context

The M24M02E-FMN6TP implements a dedicated I²C target interface with open-drain SDA and input-only SCL, requiring external pull-up resistors. Its internal architecture includes an HV generator, ECC-enabled sense amplifier, and page latches supporting byte/page write within 4 ms typical.

Three nonvolatile registers-device type identifier (DTI), configurable device address (CDA), and software write protection (SWP)-are accessed via dedicated I²C sub-addressing protocols using device-type-specific MSB address patterns (e.g., A15–A13 = 111 for DTI). The WC pin provides hardware-level memory array protection independent of register settings.

Key Specifications

Pinout & Package

Package: SO8N (150 mil width), ECOPACK2-compliant, 8-pin surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CM02-SSHD-T and BR24M256FJ-WE2, the M24M02E-FMN6TP uniquely combines hardware WC pin, lockable ID page, and CDA register-enabling secure multi-device I²C networks with field-programmable addressing and tamper-proof calibration storage.

Availability

M24M02E-FMN6TP is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data logging, and automotive body control module settings requiring stable component supply across extended product lifecycles.

Supply support for M24M02E-FMN6TP 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 analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The M24M02E-F series belongs to ST's high-reliability serial EEPROM product line, engineered specifically for applications demanding secure, long-term parameter storage with multi-layer write protection and industrial-grade environmental resilience.

FAQ

What is the function of the WC pin on M24M02E-FMN6TP?

The WC (Write Control) pin is a hardware-level enable/disable input for the entire memory array. When driven high, all write operations-including byte, page, and register writes-are blocked regardless of software protection settings. When low or floating, writes are permitted subject to SWP register and CDA configuration. This provides fail-safe protection against unintended writes during power transients.

Can the identification page be locked after initial programming?

Yes-the 256-byte identification page can be permanently locked in read-only mode using a dedicated I²C command sequence. Once locked, subsequent write attempts to this page return a NACK. Locking is irreversible and occurs independently of the SWP register, providing a hardened zone for calibration keys or security tokens that must survive field reprogramming.

How does the configurable device address (CDA) register affect I²C bus addressing?

The CDA register contains the C2 bit, which determines the chip-enable portion of the 7-bit I²C device address. With C2 = 0 or 1, two M24M02E-FMN6TP devices can share the same bus using distinct addresses (e.g., 0x50 and 0x51). The DAL bit freezes C2 permanently; once set to 1, the address cannot be altered, ensuring deterministic addressing in mass-produced systems.

Is the M24M02E-FMN6TP compatible with standard I²C bus pull-up resistor values?

Yes-it complies with standard I²C electrical specifications. For 1 MHz operation, a 1.8 kΩ pull-up to 3.3 V is recommended; for 400 kHz, 2.2 kΩ is typical. The open-drain SDA output supports standard bus capacitance limits (≤400 pF), and the device acknowledges within 100 ns of SCL high, meeting Fast-mode Plus timing requirements without external acceleration circuitry.