STMicroelectronics ST25-TAG-BAG-UT1

Overview

ST25-TAG-BAG-UT1 from STMicroelectronics is a ready-to-use evaluation kit containing seven distinct NFC tag configurations-six based on the ST25TV02KC (NFC Forum Type 5, ISO/IEC 15693, 2 Kbit memory, tamper-detect capable) and two on ST25TN01K (NFC Forum Type 2, ISO/IEC 14443-A, 1 Kbit memory)-mounted on antennas of varying size (17–50 mm diameter or 30×30 to 85×54 mm), substrate (on-metal, card, button, field detector with LED), and capacitance (23–99 pF).

For engineers reviewing the ST25-TAG-BAG-UT1 datasheet, ST25-TAG-BAG-UT1 application, ST25-TAG-BAG-UT1 pinout (N/A - passive tag set), or ST25-TAG-BAG-UT1 equivalent, this kit enables rapid comparative validation of antenna coupling, read range, tamper response, metal-mount performance, and NFC field detection across real-world deployment conditions without IC-level soldering or RF tuning.

Technical Context

The kit integrates two IC families: ST25TV02KC supports long-range (up to 1.5 m) ISO/IEC 15693 operation with dynamic lock, password protection, and hardware-based tamper detection triggered by conductive layer breach; ST25TN01K delivers short-range (≤10 cm) ISO/IEC 14443-A compatibility with fast read/write, UID mirroring, and energy harvesting capability.

All tags use optimized planar antennas tuned to 13.56 MHz, with capacitance values (23–99 pF) selected per form factor and mounting surface-e.g., 23 pF for on-metal variants to compensate for eddy current losses, 99 pF for compact 17 mm smart labels to maintain resonance.

Key Specifications

Availability

ST25-TAG-BAG-UT1 is available at Aetrix Electronics and suitable for NFC system validation, reader interoperability testing, and metal-surface tag deployment requiring stable component supply and consistent antenna performance across multiple physical configurations.

Supply support for ST25-TAG-BAG-UT1 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, designing and manufacturing microcontrollers, sensors, power ICs, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

This kit belongs to the ST25T NFC tag product family, engineered specifically to accelerate development of certified, production-ready NFC deployments-from anti-tamper logistics tracking to contactless commissioning and field diagnostics.

FAQ

Does ST25-TAG-BAG-UT1 include active circuitry or require external power?

No. All components are passive NFC tags powered solely by the reader's RF field. The ST25TV02KC and ST25TN01K ICs harvest energy from 13.56 MHz magnetic coupling and contain no batteries or external power connections. The LED on the field detector variant is driven directly by harvested RF energy during active polling.

Can the tamper-detect functionality be reset or re-enabled after triggering?

No. Tamper detection on the ST25TV02KC is a one-time, irreversible hardware event. Once the conductive security layer is breached, the TAMPER flag is permanently set in non-volatile memory and cannot be cleared via software or electrical means-even after repowering or reinitialization.

What is the maximum reliable read distance for the ST25TV02KC tags in this kit?

Under ideal conditions (high-power ISO/IEC 15693 reader, free-space orientation, no interference), the 35 mm diameter ST25TV02KC label achieves up to 1.5 m read range. On-metal and compact variants reduce this to 20–50 cm due to antenna detuning and reduced aperture size.

Is the ST25TN01K card compatible with standard NFC smartphones?

Yes. The ST25TN01K card operates per NFC Forum Type 2 and ISO/IEC 14443-A, enabling full compatibility with all Android and iOS devices supporting host-card emulation (HCE) or reader/writer mode-including NDEF message exchange, URL launching, and basic credential emulation without proprietary drivers.