STMicroelectronics M24M01-RCS6TP/A

Overview

M24M01-RCS6TP/A from STMicroelectronics is a 1-Mbit I²C serial EEPROM organized as 128 K × 8 bits, operating across 1.7 V to 5.5 V supply and –40 °C to +85 °C ambient range. It supports 1 MHz, 400 kHz, and 100 kHz I²C bus modes, features 256-byte page write with ≤5 ms latency, and includes hardware write protection via WC pin for full-memory lockout - deployed in industrial PLCs for firmware parameter storage.

For engineers reviewing the M24M01-RCS6TP/A datasheet, M24M01-RCS6TP/A pinout, M24M01-RCS6TP/A application, or M24M01-RCS6TP/A equivalent, key selection criteria include I²C timing compliance at 1 MHz under 1.7 V, guaranteed 4 million write cycles, 200-year data retention, and dual chip-enable (E1/E2) address configuration for multi-device bus topology.

Technical Context

The device implements a standard I²C slave protocol with fixed 7-bit device identifier (1010xxxR/W) where E1/E2 pins select bits b3/b2 of the address. It uses internal high-voltage generation for EEPROM programming and incorporates a power-on reset (POR) circuit that prevents spurious writes during VCC ramp-up.

Memory access follows strict I²C Start/Stop sequences: Stop condition triggers internal write cycle; ACK polling on SDA enables non-blocking write completion detection. The WC pin operates as an active-high hardware write inhibit, independent of I²C command flow - asserting WC=1 blocks all data byte acknowledgments while still accepting device address bytes.

Key Specifications

Pinout & Package

Package: SO8 (MN), 150 mil width, ECOPACK2® RoHS-compliant 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-RCS6TP/A delivers superior endurance (4M vs. 1M cycles) and data retention (200 vs. ≤100 years), plus dedicated hardware write control - making it optimal for infrastructure-class deployments where field maintenance is infrequent or costly.

Availability

M24M01-RCS6TP/A is available at Aetrix Electronics and suitable for industrial PLCs, medical calibration systems, smart energy meters, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for M24M01-RCS6TP/A 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 M24M01 belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, long-life nonvolatile storage in harsh environments - emphasizing write endurance, wide voltage operation, and I²C protocol fidelity.

FAQ

What is the function of the WC pin on the M24M01-RCS6TP/A?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When WC = 1, the device acknowledges device address and memory address bytes but refuses to acknowledge data bytes - preventing accidental or malicious writes without software involvement. This differs from software-based write protection, offering fail-safe security during power transitions or firmware crashes.

Can the M24M01-RCS6TP/A operate at 1 MHz with a 1.7 V supply?

Yes - the M24M01-RCS6TP/A is fully specified for 1 MHz I²C operation across its entire 1.7 V to 5.5 V supply range. This is confirmed in Section 6 (Operating Conditions) of the official datasheet (DocID12943 Rev 14), where Table 7 lists f_C = 1 MHz at V_CC = 1.7 V. No derating or external acceleration circuitry is required.

How many unique I²C addresses can be configured using E1 and E2?

E1 and E2 configure bits b2 and b3 of the 7-bit I²C device address (1010xxxy), enabling four distinct addresses: 101000y, 101001y, 101010y, and 101011y - where y is the R/W bit. Each combination allows up to four M24M01-RCS6TP/A devices on the same I²C bus without address conflict, supporting modular system expansion.

Is the SO8 package of the M24M01-RCS6TP/A RoHS-compliant and lead-free?

Yes - the SO8 (MN) package used in M24M01-RCS6TP/A carries the ECOPACK2® designation, indicating full compliance with RoHS Directive 2011/65/EU and halogen-free status. Lead-free soldering is supported per JEDEC J-STD-020D.2, with peak reflow temperature of 260 °C for 30 seconds, as documented in Section 9.2 of the datasheet.