STMicroelectronics M24M01-RMN6P

Overview

M24M01-RMN6P from STMicroelectronics is a 1-Mbit (128 Kbyte) I²C-compatible serial EEPROM organized as 128 K × 8 bits, operating from 1.7 V to 5.5 V across –40 °C to +85 °C. It supports I²C bus speeds up to 1 MHz, features 256-byte page write capability with ≤5 ms write time, and includes hardware write protection via WC pin and chip enable inputs (E1/E2) for multi-device addressing - deployed in industrial control modules for firmware parameter storage and calibration data retention.

For engineers reviewing the M24M01-RMN6P datasheet, M24M01-RMN6P pinout, M24M01-RMN6P application, or M24M01-RMN6P equivalent, key selection considerations include its dual-voltage operation (1.7–5.5 V), guaranteed 4 million write cycles, 200-year data retention, SO8 ECOPACK2® package compatibility, and I²C address configuration flexibility using E1/E2 pins.

Technical Context

The M24M01-RMN6P implements a standard I²C slave interface with fixed 7-bit device identifier (1010xxxR/W) where bits b3–b2 map to physical E1/E2 inputs, enabling up to four devices on one bus. Its internal architecture includes an address register, page decoder, high-voltage generator for EEPROM programming, and error-tolerant write cycling logic with ACK polling support.

Write operations are gated by the WC pin: when high, all writes to the main memory array are inhibited while device select and address bytes remain acknowledged; when low or floating, byte and page writes execute within 5 ms. The device integrates power-on reset (POR) and enhanced ESD/latch-up protection per ECOPACK2® specifications.

Key Specifications

Pinout & Package

Package: SO8 ECOPACK2® (150 mil width, 3.9 × 4.9 mm body), RoHS-compliant, surface-mount plastic small outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CM01-SSHD-T and BR24M10YFVM-WE2, the M24M01-RMN6P uniquely combines configurable I²C addressing (E1/E2), explicit hardware write lock (WC), and industrial-grade reliability in a widely adopted SO8 footprint - making it optimal for scalable, safety-critical embedded systems requiring field-updatable nonvolatile storage.

Availability

M24M01-RMN6P is available at Aetrix Electronics and suitable for industrial PLCs, smart energy meters, medical infusion pumps, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for M24M01-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, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and memory products for industrial, automotive, and consumer markets.

The M24M01-RMN6P belongs to ST's M24 series of I²C EEPROMs, engineered specifically for robust, low-power, multi-voltage nonvolatile storage in harsh industrial and automotive environments - emphasizing write endurance, data retention, and bus configurability.

FAQ

What is the function of the DU pin on M24M01-RMN6P?

Pin 1 is marked "DU" (Do Not Use) and has no internal connection. It must remain unconnected or be tied to VSS; applying any signal or leaving it floating may cause unpredictable behavior or latch-up. This pin is reserved for future product variants and is not functional in the M24M01-RMN6P.

Can M24M01-RMN6P operate reliably at 1.7 V while sustaining 1 MHz I²C communication?

Yes - the M24M01-RMN6P is fully specified for 1 MHz I²C operation across its entire 1.7 V to 5.5 V supply range. Electrical characteristics in Table 15 (Rev 14 datasheet) confirm t_BUF, t_LOW, and t_HIGH meet Fast-mode Plus timing requirements down to 1.7 V, validated across temperature and process corners.

How does the WC pin interact with I²C acknowledge behavior during write attempts?

When WC = high, the device acknowledges the device select code and address bytes (confirming presence on bus) but does not acknowledge data bytes - causing the master to detect a NACK after the first data byte. This allows safe bus scanning and address verification without risking unintended writes.

Is the SO8 package of M24M01-RMN6P compatible with standard IPC-7351B footprints?

Yes - the SO8N package (150 mil width, 3.9 × 4.9 mm body) matches IPC-7351B SOIC-N-8 standard. Figure 17 in the datasheet provides the recommended copper footprint, including pad dimensions (0.6 × 1.8 mm), pitch (1.27 mm), and courtyard clearance - fully compatible with automated SMT assembly.