STMicroelectronics ANT2-M24LR-A

Overview

ANT2-M24LR-A from STMicroelectronics is a ready-to-use 20 mm × 40 mm printed circuit board featuring an M24LR64-R Dual Interface EEPROM IC, a 13.56 MHz inductive antenna etched directly on the PCB, and an I²C connector for wired interface. It enables RF and I²C dual-mode data access to the 64-Kbit EEPROM in NFC/RFID-enabled industrial tagging and smart sensor node applications.

For engineers reviewing the ANT2-M24LR-A datasheet, ANT2-M24LR-A pinout, ANT2-M24LR-A application, or ANT2-M24LR-A equivalent, this reference board supports rapid evaluation of M24LR64-R's RF coupling efficiency, I²C timing compliance, memory endurance (100 k write cycles), and dual-interface arbitration logic in real-world tag integration scenarios.

Technical Context

The board implements a tuned 13.56 MHz inductive loop antenna with impedance-matched trace geometry optimized for ISO/IEC 15693-compatible coupling to NFC readers. The M24LR64-R IC is soldered with its RF input pins directly connected to the antenna traces and its I²C pins routed to a standard 4-pin header.

No onboard voltage regulation or level-shifting is provided - the board operates at 1.8 V to 5.5 V via I²C bus power or external supply, and relies on host-side RF field strength (≥1.5 A/m) for contactless operation. Antenna performance is validated per ST's reference design layout (Gerber files available at st.com).

Key Specifications

Availability

ANT2-M24LR-A is available at Aetrix Electronics and suitable for NFC tag prototyping, industrial asset tracking, smart sensor configuration, and dual-interface EEPROM validation requiring stable component supply and documented reference layouts.

Supply support for ANT2-M24LR-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, delivering microcontrollers, power ICs, sensors, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.

The ANT2-M24LR-A belongs to ST's RFID & NFC reference design portfolio, developed specifically to accelerate adoption of dual-interface EEPROMs in maintenance-critical and field-upgradable systems where wired and wireless access must coexist reliably.

FAQ

What is the primary function of the ANT2-M24LR-A board?

The ANT2-M24LR-A is a reference evaluation board-not a standalone IC-that integrates the M24LR64-R dual-interface EEPROM with a calibrated 13.56 MHz antenna and I²C interface. Its purpose is to validate RF coupling performance, verify I²C timing margins, and demonstrate dual-access arbitration in real hardware before custom PCB design.

Does the board include any active components besides the M24LR64-R?

No. The ANT2-M24LR-A contains only passive PCB features: the etched antenna, I²C connector footprint, and mounting pads for the M24LR64-R in SO8 package. There are no resistors, capacitors, regulators, or discrete semiconductors-only the EEPROM IC and its direct RF/I²C interconnects as specified in ST's reference layout.

Can the antenna be modified or replaced on this board?

The 20 mm × 40 mm antenna is an integral part of the PCB's copper layer and not designed for modification. Altering trace geometry or dimensions invalidates the RF tuning and ISO/IEC 15693 compliance. For custom antenna designs, ST provides Gerber files and layout guidelines-but ANT2-M24LR-A itself is a fixed-reference implementation.

Is firmware or software provided with the board?

No firmware or driver software is included. ST provides the M24LR64-R datasheet, application notes (e.g., AN4217), and Gerber files. Users must implement I²C command sequences and ISO/IEC 15693 RF protocols in their host system or reader firmware to exercise the EEPROM's dual-interface functionality.