STMicroelectronics M24128-DFMN6TP

Overview

M24128-DFMN6TP from STMicroelectronics is a 128-Kbit I²C-compatible serial EEPROM organized as 16 K × 8 bits, featuring 64-byte page write, hardware write protection via WC pin, and an additional 64-byte identification page permanently lockable in read-only mode. It operates across 1.7 V–5.5 V supply and -40 °C to +85 °C, supporting 1 MHz Fast-mode Plus I²C for industrial sensor calibration storage.

For engineers reviewing the M24128-DFMN6TP datasheet, M24128-DFMN6TP pinout, M24128-DFMN6TP application, or M24128-DFMN6TP equivalent, key selection factors include its DFN8 (2 × 3 mm) ECOPACK2 package, chip enable (E2/E1/E0) address configuration, WC-controlled write inhibition, and identification page locking capability for secure parameter storage.

Technical Context

The device implements a standard I²C target protocol with 7-bit device select code (1010xxxR/W for memory array, 1011xxxR/W for ID page), where E2/E1/E0 pins configure the three LSBs of the address. It uses internal charge-pump HV generation for EEPROM programming and includes on-die ECC logic (process letter A/K variants) correcting single-bit errors per 4-byte group.

Write control (WC) is a dedicated active-high input that disables all data byte acknowledgments during write attempts while still accepting device select and address bytes - enabling selective memory protection without bus arbitration changes. The identification page supports two distinct instructions: write ID page (A10 = 0) and lock ID page (A10 = 1, data = xxxxx1x), both using the 1011 device type identifier.

Key Specifications

Pinout & Package

Package: UFDFPN8 (DFN8, 2 mm × 3 mm, ECOPACK2), 8-pin exposed pad, pin 1 marked by chamfered corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C128C-SSHL-T and BR24G128FJ-WE2, M24128-DFMN6TP uniquely provides a dedicated, permanently lockable 64-byte identification page - enabling certified secure storage of calibration keys or regulatory data without MCU intervention or firmware overhead.

Availability

M24128-DFMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy metering requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24128-DFMN6TP 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, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24128 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, multi-voltage nonvolatile storage in space-constrained and mission-critical embedded systems.

FAQ

What is the function of the WC pin on M24128-DFMN6TP?

The WC (Write Control) pin is an active-high input that disables all data byte writes while still acknowledging device select and address bytes. When driven high, the device returns NO ACK for data bytes, preventing inadvertent overwrites during power-up, brown-out, or firmware glitches - a hardware-level safeguard independent of software state.

How does the identification page differ from main memory in M24128-DFMN6TP?

The identification page is a dedicated 64-byte region accessible only via device select codes starting with 1011 (vs. 1010 for main memory). It supports two unique instructions: write ID page (A10 = 0) and lock ID page (A10 = 1, data = xxxxx1x). Once locked, it becomes permanently read-only - unlike main memory, which remains fully rewritable.

Can M24128-DFMN6TP operate at 1 MHz across its full voltage range?

Yes - M24128-DFMN6TP supports 1 MHz (Fast-mode Plus) I²C operation from 1.7 V to 5.5 V across the full -40 °C to +85 °C temperature range. This is confirmed in DS6639 Rev 33 Section 1 and Table 16, distinguishing it from variants like M24128-BW that require ≥2.5 V for 1 MHz operation.

Which packages support all E2/E1/E0 pins for address configuration?

SO8N, TSSOP8, UFDFPN8, and WLCSP8 packages expose all three chip enable pins (E2, E1, E0) for full 3-bit address configuration. The UFDFPN5 (DFN5) package omits these pins - they are internally tied low, fixing the device address to 1010000R/W and requiring matching bus controller addressing.