STMicroelectronics ST25TA02KB-PC6H5

Overview

ST25TA02KB-PC6H5 from STMicroelectronics is an NFC Forum Type 4 Tag IC compliant with ISO/IEC 14443 Type A, featuring 2-Kbit EEPROM (256-byte user memory), TruST25™ digital signature for origin authentication, and 7-byte UID. It operates contactlessly at 13.56 MHz with 106 kbps data rate and supports NDEF data structure in secure industrial tagging and product authentication applications.

For engineers reviewing the ST25TA02KB-PC6H5 datasheet, ST25TA02KB-PC6H5 pinout, ST25TA02KB-PC6H5 application, or ST25TA02KB-PC6H5 equivalent, key selection criteria include NFC Type 4 compliance, 200-year data retention, 1-million-cycle endurance, 128-bit password protection, and GPO configurability-critical for secure asset tracking and anti-cloning systems.

Technical Context

The ST25TA02KB-PC6H5 implements a fully autonomous RF-powered architecture with analog front-end tuned to 13.56 MHz, integrated 50 pF internal capacitance, and ISO/IEC 14443-A protocol stack supporting all NFC Forum Type 4 commands including ReadBinary, UpdateBinary, and Verify. Its digital unit handles NDEF file management via CC, NDEF, and proprietary System files.

It embeds TruST25™ cryptographic signature generation logic for chip-origin verification, a 20-bit anti-tearing event counter, and configurable GPO functionality-available in open-drain (ST25TA02KB-D) or CMOS (ST25TA02KB-P) variants-enabling real-time RF session status signaling without host intervention.

Key Specifications

Pinout & Package

UFDFPN5 package (1.7 × 1.4 mm, 0.5 mm pitch) with wettable flank design for automated optical inspection. Exposed thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC Type 4 tag applications.

Compared with ST25TA02KB-D, the -PC6H5 offers identical RF and memory specs but differs in GPO implementation; versus NT3H2111, it adds TruST25™ and event counter-critical for regulatory compliance and forensic traceability in high-assurance use cases.

Availability

ST25TA02KB-PC6H5 is available at Aetrix Electronics and suitable for industrial asset tagging, secure product authentication, and smart logistics labeling requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for ST25TA02KB-PC6H5 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 secure connectivity solutions for industrial, automotive, and consumer markets.

This device belongs to the ST25 NFC tag IC family, engineered specifically for secure, battery-free, short-range wireless identification and data exchange in harsh or regulated environments-emphasizing authenticity, longevity, and standards compliance.

FAQ

What is the function of the GPO pin on ST25TA02KB-PC6H5?

The GPO pin is a configurable open-drain output that signals real-time RF session states-including Session Open, Field Detect, or Writing In Progress-without host CPU involvement. It requires an external pull-up resistor (≥4.7 kΩ) and drives low during active events, enabling low-power wake-up of companion MCUs or status LEDs in sealed enclosures.

How does TruST25™ digital signature prevent tag cloning?

TruST25™ uses on-chip cryptographic logic to generate a unique, non-replicable signature tied to the physical silicon fingerprint of each ST25TA02KB-PC6H5 die. Readers verify this signature against ST's public key infrastructure, rejecting any tag lacking the correct signature-even if memory contents are perfectly duplicated-ensuring hardware-level origin trust.

Can the 20-bit event counter be reset or modified by the user?

No-the 20-bit counter is read-only and auto-incremented only upon configured events (e.g., NDEF write) after successful application selection. It features anti-tearing protection to maintain consistency during power loss, and its configuration byte can be permanently locked. There is no command or mechanism to reset or manually alter its value.

What antenna design considerations apply to ST25TA02KB-PC6H5?

The device requires a tuned 13.56 MHz LC antenna with impedance matching optimized for the internal 50 pF capacitance. Recommended coil inductance is 1.1–1.3 µH; total parallel capacitance (including PCB stray) should target ~50 pF. Antenna traces must avoid nearby ground planes or metal objects within 5 mm to maintain Q-factor and read range above 4 cm.