STMicroelectronics M24M01-RMN6TP

Overview

M24M01-RMN6TP from STMicroelectronics is a 1-Mbit (128 Kbyte) I²C-compatible 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) inputs for device addressing.

For engineers reviewing the M24M01-RMN6TP datasheet, M24M01-RMN6TP pinout, M24M01-RMN6TP application, or M24M01-RMN6TP equivalent, this device serves as a high-reliability serial nonvolatile memory for firmware storage, calibration data retention, and configuration parameter backup in space-constrained industrial and automotive control modules.

Technical Context

The M24M01-RMN6TP implements a true I²C slave interface compliant with standard, fast, and high-speed modes (up to 1 MHz), using open-drain SDA/SCL with internal pull-up compatibility. Its memory array is partitioned into 512 pages of 256 bytes each, with no internal address wrap-around during sequential writes.

Write control is enforced by the active-high WC pin, which inhibits all write operations-including byte, page, and identification page writes-when asserted. Chip Enable inputs E1 and E2 configure the two most significant address bits (b3,b2) of the 7-bit device select code, enabling up to four devices on the same I²C bus without external address jumpers.

Key Specifications

Pinout & Package

Package: SO8N (150 mil width, 3.9 mm × 4.9 mm body), ECOPACK2® RoHS-compliant plastic small outline package.

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-RMN6TP uniquely combines 1 MHz I²C performance, hardware WC-based write lock, and full 1.7 V operation - making it optimal for high-throughput, safety-critical, or wide-input-voltage embedded systems.

Availability

M24M01-RMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and medical device settings backup requiring stable component supply and long-term lifecycle support.

Supply support for M24M01-RMN6TP 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-RMN6TP belongs to ST's M24 series of I²C EEPROMs, engineered specifically for robust, low-power, high-reliability nonvolatile data storage in harsh environments with stringent longevity and write-protection requirements.

FAQ

What is the function of the WC pin on the M24M01-RMN6TP?

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 high. When WC is low or floating, writes are enabled. This provides deterministic, zero-latency protection against spurious writes caused by noise, brown-out, or software faults, independent of firmware state.

Can the M24M01-RMN6TP operate reliably at 1.7 V and 1 MHz I²C speed?

Yes. The M24M01-RMN6TP is fully specified for 1 MHz I²C operation across its entire 1.7 V to 5.5 V supply range, as confirmed in Section 6 (Operating Conditions) and Table 15 (1 MHz AC Characteristics) of the official STMicroelectronics datasheet DocID12943 Rev 14. This enables high-speed programming even in ultra-low-voltage battery-powered systems.

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

E1 and E2 pins configure bits b2 and b3 of the 7-bit I²C device address, allowing four distinct base addresses: 101000x, 101001x, 101010x, and 101011x (where x = R/W bit). Each supports separate read/write operations, enabling up to four M24M01-RMN6TP devices on a single I²C bus without address conflict or external hardware.

Is the "DU" pin on the SO8N package electrically connected internally?

No. Pin 1 labeled "DU" (Do Not Use) has no internal connection. If physically routed on the PCB, it must be tied to VSS (ground); it must never be left floating or driven by any signal. This is explicitly stated in Figure 2 and Section 2.3 of the datasheet to prevent unintended coupling or ESD path issues.