STMicroelectronics M24LR64-RMN6T/2

Overview

M24LR64-RMN6T/2 from STMicroelectronics is a dual-interface Dynamic NFC/RFID tag IC integrating 64-Kbit EEPROM, I²C bus (up to 400 kHz), and ISO 15693/ISO 18000-3 Mode 1 RF interface at 13.56 MHz. It supports simultaneous wired and contactless access to shared memory, enabling secure data exchange in smart labels, asset tracking tags, and industrial maintenance logs.

For engineers reviewing the M24LR64-RMN6T/2 datasheet, M24LR64-RMN6T/2 pinout, M24LR64-RMN6T/2 application, or M24LR64-RMN6T/2 equivalent, key selection criteria include dual-interface concurrency, 64-bit UID, sector-level password protection (RF + I²C), 1.8–5.5 V supply range, and ECOPACK2® SO8 package compatibility with legacy EEPROM footprint.

Technical Context

The M24LR64-RMN6T/2 implements a shared memory architecture where I²C and RF interfaces access the same 64-Kbit EEPROM space-8192 bytes in I²C mode, 2048 × 32-bit blocks in RF mode-with independent security domains. Its RF layer complies fully with ISO 15693 physical and protocol layers, supporting 10%/100% ASK modulation, Manchester load modulation, and Fast commands up to 53 kbit/s.

I²C operation includes byte/page write (max 4 bytes), random/sequential read, self-timed programming (5 ms max), and automatic address incrementing. RF operation features multi-level password protection: sector-specific passwords for RF writes and a single global password for I²C write lock, backed by >1 million write cycles and >40-year data retention.

Key Specifications

Pinout & Package

Package: SO8 (MN), 150 mil width, ECOPACK2® RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-interface RFID tag IC applications.

Compared with ST25DV64K-IER, M24LR64-RMN6T/2 offers simpler register-level compatibility and lower gate count for cost-sensitive designs; compared with NXH3670UK, it eliminates need for external interface bridging, reducing BOM and firmware complexity in hybrid wired/wireless systems.

Availability

M24LR64-RMN6T/2 is available at Aetrix Electronics and suitable for smart industrial labels, secure firmware staging, and asset authentication tags requiring stable component supply across multi-year production cycles.

Supply support for M24LR64-RMN6T/2 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 analog/mixed-signal products for industrial, automotive, and consumer markets.

The M24LR64-RMN6T/2 belongs to ST's ST25 Dynamic NFC tag IC family, engineered specifically for applications demanding concurrent wired and contactless access to persistent memory with hardware-enforced security boundaries.

FAQ

What is the maximum I²C clock frequency supported by the M24LR64-RMN6T/2?

The M24LR64-RMN6T/2 supports I²C standard-mode operation up to 400 kHz. It does not support fast-mode plus (1 MHz) or high-speed mode. The device uses standard I²C timing parameters including t_LOW ≥ 1.3 μs, t_HIGH ≥ 0.6 μs, and t_SU;STA ≥ 4.7 μs, as specified in the official STMicroelectronics datasheet DocID15170 Rev 16.

Does the M24LR64-RMN6T/2 require external tuning capacitors for its RF interface?

No. The M24LR64-RMN6T/2 integrates a 27.5 pF internal tuning capacitance between AC0 and AC1 pins, eliminating the need for external capacitors in most antenna designs. External matching components may still be required depending on antenna geometry and target read range, but the internal capacitor significantly simplifies layout and reduces BOM count.

How many unique passwords can be configured for RF-sector protection?

The M24LR64-RMN6T/2 supports up to eight independent sector passwords in RF mode, each protecting a 256-byte memory region. Passwords are stored in dedicated system memory and activated using Write-sector Password and Present-sector Password commands. Sector locking is irreversible once Lock-sector Password is executed.

Is the 64-bit UID factory-programmed and permanently unalterable?

Yes. The 64-bit UID is laser-programmed during wafer test and stored in ROM. It cannot be overwritten, erased, or modified by any I²C or RF command-including Fast commands-and remains constant across power cycles, resets, and memory operations. This ensures deterministic device identification for traceability and security protocols.