STMicroelectronics CLOUD-ST25TA02KB

Overview

CLOUD-ST25TA02KB from STMicroelectronics is a ready-to-use NFC Forum Type 4 Tag IC demonstration board featuring the ST25TA02KB-P dynamic RFID tag IC in UFDFPN5 package, 256-byte NDEF-compatible EEPROM, TruST25™ digital signature, ISO/IEC 14443 Type A compliance, and configurable GPO for RF field detection - used for rapid prototyping of NFC-enabled smart labels and IoT edge nodes.

For engineers reviewing the CLOUD-ST25TA02KB datasheet, CLOUD-ST25TA02KB pinout, CLOUD-ST25TA02KB application, or CLOUD-ST25TA02KB equivalent, this board enables immediate evaluation of contactless memory access, secure NDEF data exchange, GPO-driven MCU wake-up, and small-antenna NFC tag design without custom PCB development.

Technical Context

The board integrates the ST25TA02KB-P IC, a passive, RF-powered NFC tag IC compliant with NFC Forum Type 4 and ISO/IEC 14443 Type A at 106 kbps. It embeds 2 Kbit EEPROM with 200-year data retention and 1 million write cycles, plus hardware-based 128-bit password protection and 20-bit anti-tearing event counter.

The GPO terminal supports configurable active-High output (e.g., RF field presence) with external V_REF setting logic level compatibility to host MCU I/O - eliminating level shifters. TruST25™ provides cryptographic digital signature verification using on-chip ECC-based authentication.

Key Specifications

Availability

CLOUD-ST25TA02KB is available at Aetrix Electronics and suitable for NFC tag evaluation, secure smart label development, and embedded IoT node prototyping requiring stable component supply and pre-validated RF performance.

Supply support for CLOUD-ST25TA02KB 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 analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The CLOUD-ST25TA02KB belongs to ST's ST25 NFC tag evaluation platform family, engineered to accelerate adoption of secure, standards-compliant contactless interfaces in resource-constrained edge devices.

FAQ

Is CLOUD-ST25TA02KB a standalone IC or a development board?

CLOUD-ST25TA02KB is a demonstration board - not an IC. It integrates the ST25TA02KB-P NFC tag IC, a 19 mm² etched antenna, and supporting passive components. It requires no external power and operates solely via RF field coupling, enabling immediate functional validation of NFC tag behavior and GPO signaling.

What is the role of the GPO pin on this board?

The GPO (General Purpose Output) is a configurable digital output from the ST25TA02KB-P IC. By default, it asserts High when an RF field is detected, allowing direct connection to an MCU interrupt pin to trigger wake-up. Its logic level is set by an external V_REF, ensuring compatibility with 1.8 V to 5 V host I/O without level-shifting circuitry.

Does this board support secure data storage?

Yes - the embedded ST25TA02KB-P IC provides hardware-enforced security: 128-bit password protection for memory access control, TruST25™ digital signature verification using ECC cryptography, and an anti-tearing 20-bit event counter that prevents data corruption during unexpected RF field loss.

Can CLOUD-ST25TA02KB be used for NDEF message writing in production?

No - it is a demonstration board intended for evaluation and proof-of-concept. While it fully implements NFC Forum Type 4 Tag functionality including NDEF read/write over ISO/IEC 14443-A, production use requires integration of the ST25TA02KB-P IC into a custom design with validated antenna layout and regulatory compliance testing.