STMicroelectronics M24512-RMN6P

Overview

M24512-RMN6P from STMicroelectronics is a 512-Kbit (64 Kbyte) I²C-compatible serial EEPROM organized as 64 K × 8 bits, operating from 1.8 V to 5.5 V supply and supporting 1 MHz clock speed. It features 128-byte page write, hardware write protection via WC pin, and enhanced ESD/latch-up immunity. Used in industrial control modules for parameter storage and calibration data retention.

For engineers reviewing the M24512-RMN6P datasheet, M24512-RMN6P pinout, M24512-RMN6P application, or M24512-RMN6P equivalent, key selection criteria include supply voltage range (1.8–5.5 V), I²C bus mode compatibility (100 kHz/400 kHz/1 MHz), page size (128 byte), write endurance (>4 million cycles), and package-specific pin mapping for TSSOP8.

Technical Context

The M24512-RMN6P implements a standard I²C slave interface with start/stop detection, ACK/NACK handshaking, and 7-bit device addressing extended by three chip-enable inputs (E2–E0) for multi-device bus configuration. It supports random, current-address, and sequential read modes, plus byte and page write operations with automatic address incrementing.

Internal architecture includes an ECC engine correcting single-bit errors per 4-byte group, a high-voltage charge pump for write cycling, and a power-on-reset circuit ensuring safe initialization across –40 °C to +85 °C. Write control (WC) input enables hardware-level memory lockout independent of software commands.

Key Specifications

Pinout & Package

Package: TSSOP8 (DW), 169 mil width, ECOPACK2®-compliant surface-mount package with exposed pad option for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-SSHL-T and BR24G512FJ-WE2, the M24512-RMN6P uniquely combines hardware write control, ECC, and 4-million-cycle endurance in a single 1.8–5.5 V I²C EEPROM - making it optimal for industrial and medical systems demanding both security and longevity.

Availability

M24512-RMN6P is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24512-RMN6P 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 products for industrial, automotive, and consumer markets.

The M24512-RMN6P belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, multi-voltage nonvolatile storage in harsh environments with stringent reliability requirements.

FAQ

What is the function of the WC pin on M24512-RMN6P?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations-including byte write, page write, and identification page access-when driven to VCC. When left floating or pulled low, writes are enabled. This provides fail-safe protection against unintended memory modification during power transitions or noise events, independent of software state.

Does M24512-RMN6P support I²C clock stretching?

No, the M24512-RMN6P does not implement clock stretching. It relies on fixed internal timing for ACK generation and write cycle execution. Bus masters must respect the maximum write time (t_W = 5 ms) and use ACK polling or fixed delays to determine write completion before issuing subsequent commands.

How does the ECC feature operate in M24512-RMN6P?

ECC operates transparently on groups of four consecutive bytes (addresses 4N to 4N+3). During read, it detects and corrects single-bit errors within each group. During write, writing any byte in a group triggers ECC updates to all four bytes, distributing wear evenly and limiting total group-level endurance to 4 million cycles across the quartet.

Can M24512-RMN6P be used with 1.8 V I²C masters without level shifters?

Yes. The M24512-RMN6P supports full I²C functionality-including SDA/SCL input thresholds and output drive strength-at 1.8 V supply. Its logic high input threshold is 0.7×VCC (≥1.26 V at 1.8 V), and its open-drain SDA output pulls down to <0.4 V, ensuring interoperability with 1.8 V masters without external level translation.