STMicroelectronics M24512-DFDW6TP

Overview

M24512-DFDW6TP from STMicroelectronics is a 512-Kbit I²C-compatible serial EEPROM organized as 64 K × 8 bits, operating from 1.7 V to 5.5 V with 1 MHz clock support, featuring 128-byte page write, identification page with permanent lock capability, and ECOPACK2® TSSOP8 package. It serves as nonvolatile configuration storage in industrial controllers, power supply monitors, and sensor calibration modules.

For engineers reviewing the M24512-DFDW6TP datasheet, M24512-DFDW6TP pinout, M24512-DFDW6TP application, or M24512-DFDW6TP equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C bus mode compatibility (100 kHz/400 kHz/1 MHz), identification page lockability, WC-controlled full-array write protection, and TSSOP8 ECOPACK2® packaging for space-constrained PCBs.

Technical Context

The device implements a slave-only I²C interface with hardware address decoding via E0–E2 pins, supporting standard, fast, and fast-plus modes up to 1 MHz. Its internal architecture includes ECC logic across groups of four bytes, transparently correcting single-bit errors during read operations without protocol overhead.

It features dual addressing schemes: memory array access uses device select code 1010b with E0–E2, while the identification page uses 1011b. The WC pin enables hardware-level write inhibition across the entire memory array, independent of software commands or I²C state.

Key Specifications

Pinout & Package

Package: TSSOP8 (DW), 169 mil width, ECOPACK2® RoHS-compliant surface-mount package with 0.65 mm pitch and exposed pad option for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-SSHL-T and BR24T512FJ-WE2, the M24512-DFDW6TP uniquely combines full-voltage 1 MHz I²C operation, ECC-per-group reliability, and a permanently lockable identification page-making it optimal for safety-critical or regulatory-auditable applications where data integrity and immutability are mandatory.

Availability

M24512-DFDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, smart power supply monitoring, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24512-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 management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24512 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, and secure nonvolatile data storage in resource-constrained embedded systems with stringent reliability requirements.

FAQ

What is the function of the WC pin on M24512-DFDW6TP?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. It operates independently of I²C commands and remains effective during power transitions, preventing accidental writes during brown-out or reset conditions. When WC is low or floating, normal write operations proceed as configured by the I²C protocol.

Does M24512-DFDW6TP support I²C fast-plus mode (1 MHz) across its full voltage range?

Yes-M24512-DFDW6TP supports 1 MHz I²C clock operation from 1.7 V to 5.5 V, unlike many competing EEPROMs that limit 1 MHz to ≥2.5 V. This enables direct interface with 1.8 V microcontrollers without level shifters while maintaining maximum throughput for configuration updates.

How does the identification page differ from standard memory pages?

The identification page is a dedicated 128-byte region accessible via I²C device address prefix 1011b (vs. 1010b for main array). It supports write and read operations until permanently locked via a specific command; once locked, it becomes read-only and cannot be reprogrammed-even with WC = low or power cycling.

Is ECC functionality user-configurable or automatic?

ECC is fully automatic and transparent-no user configuration or software overhead is required. It operates on every group of four consecutive bytes (addresses 4N–4N+3), detecting and correcting single-bit errors during read operations. Writes to any byte in a group also cycle the other three bytes in that group to maintain ECC consistency.