STMicroelectronics ANT7-T-M24SR64

Overview

ANT7-T-M24SR64 from STMicroelectronics is a ready-to-use 14 mm × 14 mm antenna reference board for the M24SR64-Y dual-interface EEPROM, integrating a 13.56 MHz double-layer etched RF antenna, I²C test points, open-drain GPO for RF activity indication, and digital RF disable (DIS) input. It enables rapid evaluation of contactless + I²C memory functionality in NFC-enabled embedded systems.

For engineers reviewing the ANT7-T-M24SR64 datasheet, ANT7-T-M24SR64 pinout, ANT7-T-M24SR64 application, or ANT7-T-M24SR64 equivalent, this board supports functional validation of M24SR64-Y RF coupling efficiency, I²C timing margins, GPO logic behavior during RF transactions, and DIS-controlled RF shutdown sequencing in compact NFC tag reader designs.

Technical Context

The board implements a fixed-geometry 13.56 MHz antenna tuned for optimal coupling with ISO/IEC 14443 Type A/B readers and NFC Forum-compliant devices. Its single-sided layout places the M24SR64-Y IC adjacent to the antenna feed point, with direct I²C routing to test pads (SDA, SCL, VCC, GND) and discrete control lines (GPO, DIS).

All passive components are omitted - no external pull-ups, filters, or matching networks are integrated. The design relies entirely on the M24SR64-Y's internal RF front-end and I²C interface, making it a minimal, unmodified reference for antenna performance and protocol interoperability testing.

Key Specifications

Availability

ANT7-T-M24SR64 is available at Aetrix Electronics and suitable for NFC tag prototyping, secure element integration validation, contactless configuration testing, and dual-interface EEPROM interoperability assessment requiring stable component supply and documented reference design fidelity.

Supply support for ANT7-T-M24SR64 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 specializing in microcontrollers, analog ICs, MEMS, power management, and secure connectivity solutions for automotive, industrial, and consumer markets.

This board belongs to ST's NFC and RFID evaluation platform family, designed to accelerate development of ISO/IEC 14443-compliant dual-interface memory systems with minimal RF design overhead.

FAQ

Is the ANT7-T-M24SR64 compatible with NFC smartphones?

Yes - the board uses the M24SR64-Y EEPROM with ISO/IEC 14443 Type A compliance and NFC Forum Tag Type 4A certification. Its 14 mm × 14 mm antenna is tuned for reliable coupling with standard NFC smartphones at ≤3 cm distance under typical alignment conditions.

Does the board include pull-up resistors for I²C lines?

No - the ANT7-T-M24SR64 provides only bare I²C test points (SDA, SCL, VCC, GND) with no onboard pull-up resistors. External 2.2 kΩ–4.7 kΩ pull-ups must be added by the user to meet I²C bus specifications and ensure proper signal rise time.

What is the purpose of the GPO signal?

The GPO (General Purpose Output) is an open-drain indicator tied to the M24SR64-Y's internal RF activity flag. It pulls low during any RF transaction (read/write/RF field detection), enabling real-time hardware synchronization without software polling or protocol decoding.

Can the DIS input be used to reduce power consumption?

Yes - asserting DIS disables the M24SR64-Y's RF front-end while preserving I²C accessibility and EEPROM data retention. This reduces quiescent current during non-RF operation, supporting low-power modes in battery-operated NFC tag readers or hybrid sensor nodes.