STMicroelectronics M24C04-FMN6TP

Overview

M24C04-FMN6TP from STMicroelectronics is a 4-Kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, operating with 1.7 V to 5.5 V supply (full temp range) or 1.6 V to 5.5 V under restricted conditions. It supports 400 kHz I²C clock, features 16-byte page write, write protection via WC pin, and delivers >4 million write cycles with >200-year data retention at 55 °C. Used for firmware parameter storage in industrial controllers and sensor calibration data logging.

For engineers reviewing the M24C04-FMN6TP datasheet, M24C04-FMN6TP pinout, M24C04-FMN6TP application, or M24C04-FMN6TP equivalent, this page provides verified electrical specs, package mapping to UFDFPN8 (2 × 3 mm), validated I²C timing behavior, WC-controlled memory protection logic, and real-world use cases in embedded systems requiring nonvolatile configuration storage.

Technical Context

The M24C04-FMN6TP implements a standard I²C slave protocol with 7-bit device address (1010xxxA8) where E1/E2 pins define two address bits-though these are unconnected in the UFDFPN8 package, fixing E1=E2=0. It uses internal high-voltage generation for EEPROM programming and includes a power-on-reset circuit that prevents spurious writes during VCC ramp-up.

Its memory array supports random and sequential read modes, byte/page write with automatic address increment, and write inhibit when WC is high. The SDA line operates open-drain with mandatory external pull-up, and ACK polling is supported to detect write completion without fixed delay timing.

Key Specifications

Pinout & Package

Package: UFDFPN8 (ECOPACK2), 2 mm × 3 mm, 0.5 mm pitch, exposed pad (no thermal pad connection required). 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 AT24C04D-SSHM-T and BR24G04NUX-5TR, the M24C04-FMN6TP uniquely combines hardware WC protection, 200-year data retention, ECOPACK2 compliance, and full –40 °C to +85 °C operation in a space-saving UFDFPN8 package-making it optimal for industrial and medical designs demanding robustness and longevity.

Availability

M24C04-FMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24C04-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 microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24C04 series belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding embedded systems.

FAQ

What is the function of the WC pin on M24C04-FMN6TP?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations-including byte and page writes-when driven high. When low or floating, writes are enabled. This provides deterministic, firmware-independent protection against accidental memory corruption during power transients or software faults, and is especially valuable in safety-critical applications like medical devices.

Does M24C04-FMN6TP support I²C clock stretching?

No, the M24C04-FMN6TP does not support clock stretching. As a standard I²C slave EEPROM, it relies on the master to control SCL timing. During internal write cycles (up to 5 ms), the device ignores all bus activity and does not acknowledge any address or data bytes-requiring the host to use ACK polling or fixed-delay recovery instead of stretching SCL.

Can M24C04-FMN6TP operate at 1.6 V across the full temperature range?

No. At 1.6 V, operation is restricted to temperatures ≥ 0 °C for write operations and ≥ –20 °C for read operations per DS9387 Rev 6. Full –40 °C to +85 °C functionality requires VCC ≥ 1.7 V. This voltage/temperature constraint is enforced by internal POR and timing margins, and must be verified in system-level validation.

How is device addressing handled in the UFDFPN8 package?

In the UFDFPN8 package, E1 and E2 pins are not connected and internally pulled low, fixing the device address to 101000A8 (hex). Only A8 remains configurable via external wiring, allowing up to two unique addresses on the same I²C bus. No external pull-ups or ties are needed for E1/E2-this simplifies layout and eliminates address configuration errors common in SO8N/TSSOP8 variants.