STMicroelectronics M24M01-RDW6TP

Overview

M24M01-RDW6TP from STMicroelectronics is a 1-Mbit I²C 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 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 and dual Chip Enable (E1/E2) for device addressing in multi-drop systems. It is used in industrial PLCs for firmware parameter storage and calibration data retention.

For engineers reviewing the M24M01-RDW6TP datasheet, M24M01-RDW6TP pinout, M24M01-RDW6TP application, or M24M01-RDW6TP equivalent, this page delivers verified electrical specs, validated SO8 package mapping, confirmed I²C timing compliance at 1 MHz, and real-world use cases in embedded control and sensor calibration systems.

Technical Context

The M24M01-RDW6TP implements a standard I²C slave interface with fixed 7-bit device address (1010xxxR/W), where bits b3–b2 are decoded from E1/E2 inputs. 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.

It supports three I²C clock speeds (100/400/1000 kHz) with guaranteed AC timing per Table 14–15, and employs ACK polling to detect write cycle completion. The WC pin provides hardware-level write inhibition: when high, all data bytes are NACKed while device/address bytes remain acknowledged.

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 M24M01-RDW6TP, AT24CM01 offers lower cost but weaker fault tolerance due to absence of hardware WC lock, while BR24M10YFVM provides smaller TSSOP8 packaging at the expense of multi-device addressing flexibility and reduced data retention.

Availability

M24M01-RDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, PLC configuration storage, and smart meter firmware parameter retention requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24M01-RDW6TP 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-RDW6TP belongs to ST's M24M series of high-reliability serial EEPROMs, engineered specifically for mission-critical industrial control, energy metering, and medical instrumentation where data integrity, long-term retention, and robust I²C interoperability are mandatory.

FAQ

What is the function of the WC pin on M24M01-RDW6TP?

The WC (Write Control) pin is an active-high hardware lock that globally disables all write operations to the EEPROM array. When driven high, the device acknowledges device and address bytes but NACKs all subsequent data bytes, preventing accidental overwrites during power transitions or system faults. It operates independently of software commands and requires no firmware intervention.

Can M24M01-RDW6TP operate reliably at 1.7 V supply?

Yes - the M24M01-RDW6TP ('-R' variant) is fully specified down to 1.7 V, supporting 1 MHz I²C operation and guaranteed write endurance across the full –40 °C to +85 °C range at this minimum voltage. Its internal charge pump and POR circuit ensure stable programming and read functionality even under marginal supply conditions typical in battery-backed or energy-harvesting systems.

How many devices can share the same I²C bus using M24M01-RDW6TP?

Up to four M24M01-RDW6TP devices can coexist on a single I²C bus using the dual Chip Enable pins (E1/E2). These pins configure bits b2–b3 of the 7-bit device address (1010xxxA), enabling four unique addresses (101000xx to 101011xx). No external address jumpers or resistors are required - addressing is set solely by E1/E2 logic levels.

Is the SO8 package of M24M01-RDW6TP RoHS-compliant?

Yes - the M24M01-RDW6TP in SO8 (MN) package carries the ECOPACK2® designation, confirming full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. It is halogen-free, lead-free, and qualified for standard SnPb and lead-free reflow soldering profiles per JEDEC J-STD-020D.