STMicroelectronics M24512-DRMF3TG/K

Overview

M24512-DRMF3TG/K from STMicroelectronics is an automotive-grade 512-Kbit serial I²C EEPROM with AEC-Q100 Grade 1 qualification, operating from −40 °C to 125 °C and supporting 1 MHz I²C clock speed. It features 64 Kbyte memory organized in 512 pages of 128 bytes each, includes a dedicated 128-byte lockable Identification Page for device ID and application parameters, and delivers 4 million write cycles at 25 °C. It is used in engine control units, ADAS sensor modules, and battery management systems for nonvolatile storage of calibration data and firmware configuration.

For engineers reviewing the M24512-DRMF3TG/K datasheet, M24512-DRMF3TG/K pinout, M24512-DRMF3TG/K application, or M24512-DRMF3TG/K equivalent, key selection criteria include I²C bus timing compliance at 1 MHz, extended temperature operation up to 125 °C, page-write capability with 4 ms latency, ECC-enhanced data integrity, and hardware write protection via WC pin - all critical for functional safety–compliant automotive designs.

Technical Context

The device implements a true EEPROM core with embedded Error Correction Code (ECC) logic across all 64 Kbytes, enabling detection and correction of single-bit errors during read operations. Its I²C interface fully supports Standard (100 kHz), Fast (400 kHz), and Fast-Mode Plus (1 MHz) modes, with Schmitt-trigger inputs on SCL/SDA ensuring robust noise immunity in electrically noisy vehicle environments.

Addressing uses a 7-bit device select code (1010b for memory, 1011b for Identification Page) combined with E2/E1/E0 pins to support up to eight devices on one bus. The WC pin provides hardware-level write inhibition: when high, it blocks all writes to both main array and Identification Page, while still acknowledging device address and command bytes - enabling fail-safe configuration lockdown.

Key Specifications

Pinout & Package

Package: WFDFPN8 (2 × 3 mm, 0.5 mm pitch, RoHS-compliant ECOPACK2®). 8-pin ultra-thin dual flat no-lead package optimized for space-constrained automotive PCBs and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CS512-MAHM-T and BR24T512FJ-WE2, the M24512-DRMF3TG/K uniquely combines AEC-Q100 Grade 1, ECC, lockable Identification Page, and WC pin - delivering a single-chip solution for ISO 26262 ASIL-B parameter storage without external safeguards or software overhead.

Availability

M24512-DRMF3TG/K is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, battery management systems, and automotive gateway modules requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24512-DRMF3TG/K 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 automotive, industrial, and consumer markets.

The M24512-A125 product line targets functional safety–critical automotive applications, delivering AEC-Q100 qualified serial EEPROMs with enhanced reliability features including ECC, wide temperature operation, and hardware write protection.

FAQ

What is the function of the WC pin on the M24512-DRMF3TG/K?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to both the main memory array and the Identification Page. When driven high, the device acknowledges device address and command bytes but rejects data bytes with NACK - preventing accidental or malicious overwrites during system startup, reset, or fault conditions. This feature is essential for ASIL-B–compliant systems requiring deterministic configuration integrity.

Does the M24512-DRMF3TG/K support standard I²C addressing modes?

Yes - it supports full I²C protocol compliance including Standard Mode (100 kHz), Fast Mode (400 kHz), and Fast-Mode Plus (1 MHz). It uses a 7-bit slave address formed by fixed device type identifier (1010b for memory, 1011b for Identification Page) plus 3-bit Chip Enable inputs (E2/E1/E0), allowing up to eight devices on one bus. Address recognition occurs only when E2/E1/E0 match the received bits, and R/W bit determines read/write direction.

How does the embedded ECC improve reliability in automotive use?

The embedded ECC logic performs real-time single-bit error correction and double-bit error detection on every read operation across the entire 64 Kbyte memory. This eliminates silent data corruption - a critical failure mode in ASIL-B systems - without requiring host MCU intervention or additional checksum overhead. It is especially valuable for storing safety-critical calibration data in engine control or braking modules where undetected bit flips could compromise functional safety goals.

Can the Identification Page be rewritten after being locked?

No - once the Identification Page is locked via the dedicated "Lock Identification Page" instruction, it becomes permanently read-only. The lock is irreversible and enforced by internal fuse-like circuitry. Prior to locking, users may freely read, write, and verify the 128-byte page, including overwriting the factory-programmed ST device ID (0x20, 0xE0, 0x10) with application-specific keys or parameters. This one-time programmability ensures tamper resistance for boot configuration and cryptographic material.