STMicroelectronics M24128-DFDW6TP

Overview

M24128-DFDW6TP from STMicroelectronics is a 128-Kbit I²C-compatible EEPROM organized as 16 K × 8 bits, featuring hardware write protection (WC pin), 64-byte identification page, and support for Fast-mode Plus (1 MHz), Fast-mode (400 kHz), and Standard-mode (100 kHz) I²C bus operation. It operates from 1.7 V to 5.5 V across –40 °C to +85 °C and delivers ≤5 ms byte/page write cycles - deployed in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the M24128-DFDW6TP datasheet, M24128-DFDW6TP pinout, M24128-DFDW6TP application, or M24128-DFDW6TP equivalent, key selection considerations include its 1.7–5.5 V supply range, WC-controlled hardware write lock, 64-byte ID page with permanent read-only lock capability, and compatibility with TSSOP8 and UFDFPN8 packages used in space-constrained PCB layouts.

Technical Context

This device implements a dedicated I²C target interface with open-drain SDA and input SCL, supporting standard I²C protocol timing including START/STOP detection, ACK/NACK handshaking, and 7-bit device addressing with E2/E1/E0 chip enable inputs. The internal architecture includes an HV generator, ECC logic (on process-A/K variants), page latches, and a Y/X decoder driving a 16-Kbyte EEPROM array.

It features dual operational modes: memory array access (device select code 1010xxxR/W) and identification page access (1011xxxR/W), with WC pin enabling/disabling all write operations regardless of address or mode. The identification page supports one-time permanent lock via a specific address-bit pattern (A10 = 1) and data value (xxxxxx1x).

Key Specifications

Pinout & Package

Package: UFDFPN8 (2 mm × 3 mm, 0.5 mm pitch, ECOPACK2-compliant). This leadless, surface-mount package supports automated assembly and offers thermal performance suited for compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C128C and BR24G128FJ, the M24128-DFDW6TP uniquely combines hardware WC-based write inhibition, permanent ID page lock, and ECC support - making it optimal for safety-critical or regulatory-compliant applications where data immutability and long-term integrity are mandatory.

Availability

M24128-DFDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and medical device parameter storage requiring stable component supply, full ECOPACK2 compliance, and guaranteed long-term availability.

Supply support for M24128-DFDW6TP 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 M24128 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, and secure nonvolatile data storage in space-constrained, thermally demanding applications - with emphasis on industrial automation and medical electronics.

FAQ

What is the function of the WC pin on M24128-DFDW6TP?

The WC (Write Control) pin is an active-high hardware lock that globally disables all write operations - including memory array writes, identification page writes, and lock instructions. When driven high, the device acknowledges device select and address bytes but returns NO ACK for data bytes, preventing any modification. This provides fail-safe protection during power transients or firmware errors.

Does M24128-DFDW6TP support permanent locking of the identification page?

Yes. The identification page (64 bytes) can be permanently locked in read-only mode using the "Lock Identification Page" instruction. This requires sending a byte write with device select code 1011xxxR/W, address bit A10 = 1, and data = xxxx xx1x. Once executed, the lock cannot be reversed - ensuring cryptographic keys or calibration data remain immutable for the device's lifetime.

Which package type does M24128-DFDW6TP use, and what are its key mechanical features?

M24128-DFDW6TP uses the UFDFPN8 (Ultra-Fine Pitch Dual Flat No-lead) package: 2 mm × 3 mm body, 0.5 mm pitch, 8 terminals, exposed thermal pad, and ECOPACK2 environmental compliance. Its leadless construction supports high-density PCB layouts and automated optical inspection, while the thermal pad enhances power dissipation during write cycles.

How does the ECC feature operate, and which variants include it?

ECC (Error Correction Code) is implemented only on M24128-DF variants marked with process letter A or K. It corrects single-bit errors per 4-byte group transparently during read operations. During writes, all four bytes in a group are cycled together - meaning endurance is shared across the group. Devices with other process letters (e.g., B, C) omit ECC logic entirely.