STMicroelectronics MATRIX-M24SR

Overview

MATRIX-M24SR from STMicroelectronics is a ready-to-use, divisible evaluation board hosting ten distinct 13.56 MHz NFC antenna designs-each populated with an M24SR64-Y Dynamic NFC/RFID tag IC and connected via I²C to host microcontrollers. It supports NFC phone communication, RF disable control (30 kΩ pull-down), GPO output (20 kΩ pull-up), and VCC decoupling (100 pF + 10 nF).

For engineers reviewing the MATRIX-M24SR datasheet, MATRIX-M24SR pinout, MATRIX-M24SR application, or MATRIX-M24SR equivalent, this board enables rapid comparative antenna performance validation, I²C interface integration testing, ESD-protected NFC field evaluation (ANT10), and custom antenna development (ANT12) across industrial, consumer, and smart-label prototypes.

Technical Context

The MATRIX-M24SR integrates nine pre-fabricated antenna variants-including single-layer (e.g., ANT1: 45 mm × 75 mm), double-layer (e.g., ANT7: 14 mm × 13.5 mm), round (ANT13: 20 mm Ø), and metal-tag (ANT9) topologies-plus one ESD-hardened variant (ANT10 with DSILC6-4P6, IEC61000-4-2 Level 3 compliant). All share identical M24SR64-Y IC interfacing: I²C address 0x50, 1.8–5.5 V supply, and RF disable/GPO signal routing.

Each antenna section provides independent RF coupling characteristics and near-field read/write range differentiation, enabling empirical selection of optimal geometry for size-constrained, metallic-surface, or high-reliability NFC deployment-without modifying firmware or host driver stack.

Key Specifications

Availability

MATRIX-M24SR is available at Aetrix Electronics and suitable for NFC antenna evaluation, I²C-based RFID system prototyping, and ESD-hardened NFC interface validation requiring stable component supply and traceable sourcing.

Supply support for MATRIX-M24SR 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 management ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.

The MATRIX-M24SR belongs to ST's NFC evaluation and development tools portfolio, designed specifically to accelerate adoption of the M24SRXX-Y Dynamic NFC/RFID tag IC family by providing validated antenna topologies and plug-and-play I²C connectivity.

FAQ

Can MATRIX-M24SR be used with microcontrollers other than STM32?

Yes. The board uses standard I²C signaling (address 0x50) and requires no proprietary drivers. It has been verified with ARM Cortex-M, ESP32, PIC, and Linux-based hosts using generic I²C master libraries. Pull-up resistors on SCL/SDA are omitted to avoid bus contention-external 4.7 kΩ pull-ups are recommended.

Is the M24SR64-Y IC pre-programmed on each antenna section?

No. Each M24SR64-Y IC ships unprogrammed with factory-default memory content and NDEF message area erased. Users must initialize the IC via I²C to configure memory mapping, access conditions, and write NDEF records-ST provides reference firmware and AN4509 application note for setup.

What is the maximum read range achievable with ANT1 versus ANT13?

Measured under identical conditions (NFC phone, 3.3 V supply, no metal interference), ANT1 (45 mm × 75 mm) achieves ~55 mm peak read range, while ANT13 (20 mm round double-layer) reaches ~32 mm. Range differences stem directly from loop area, inductance (ANT1 ≈ 1.2 µH, ANT13 ≈ 0.8 µH), and Q-factor-data confirmed in ST's AN4472 characterization report.

Are Gerber files and schematic available for MATRIX-M24SR?

Yes. ST publishes full design files-including Gerbers, BOM, and PDF schematics-for MATRIX-M24SR under license-free use at www.st.com under document number DocID025534. These files support custom modifications, antenna replication, and compliance testing (e.g., EN 300 330, FCC Part 15B).