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STMicroelectronics ST25DA-C NFC/RFID Tag IC

STMicroelectronics ST25DA-C NFC/RFID Tag Integrated Circuit (IC) provides a fast, intuitive, and robust commissioning experience for users. The ST25DA-C is an NFC dynamic tag IC that offers cryptographic services, secure storage, and protocols that handle Matter Passcode-Authenticated Session Establishment (PASE) based on the SPAKE2+ protocol. Built on a Common Criteria (CC) certified secure hardware, the ST25DA-C is designed to be the NFC component of a smart IoT device, performing as an NFC-secure companion to the main controller. STMicroelectronics ST25DA-C NFC/RFID Tag IC provides a one-step pre-commissioning design, creating user-centered interactions that feel natural and effortless without compromising product aesthetics.

Features

  • Security
    • Secure MCU
    • Active shield
    • Monitoring of environmental parameters
    • Protection mechanism against faults
    • Protection against side-channel attacks
    • Unique serial number on each die
    • NIST 800-90B compliant true random-number generator (TRNG)
    • Elliptic curve digital signature algorithm (ECDSA) with SHA-256 for digital signature generation and verification
    • Elliptic curve Diffie-Hellman (ECDH) for key establishment
    • Symmetric cryptography with AES-CCM for data confidentiality and integrity
    • Symmetric cryptography with AES-CTR for data privacy
  • Matter services
    • Stores Matter onboarding data in NFC Forum Type 4 tag
    • Performs commissioning over NFC Transport Layer (NTL)
      • Powered either by VCC pin or 13.56MHz contactless carrier
      • SPAKE2+
    • Secure storage for certificates and keys needed for Matter commissioning
    • Provides Matter signature generation and verification over I2C
  • Memory
    • More than 3KB of non-volatile memory is allocated for Matter certificates, keys, and attributes

Specifications

  • Contactless interface
    • Power supplied by 13.56MHz carrier
    • Complies with ISO/IEC 14443 Type A
    • Complies with NFC Forum Type 4 Tag
    • 78pF tuning capacitor, with automatic antenna tuning for optimized performance
    • Automatic CPU frequency adaptation for optimum power consumption
    • 7-byte unique identifier (UID) on each die
  • Contact interface
    • 1.62V to 3.3V supply voltage range
    • 2-wire I2C serial interface supporting fast mode (up to 400kHz)
    • ESD protection
      • Human body model (HBM): 6kV for digital and antenna pads
      • Charge device model (CDM): 1kV based on a STMicroelectronics module

Logical Block Diagram

Block Diagram - STMicroelectronics ST25DA-C NFC/RFID Tag IC
Published: 2025-12-01 | Updated: 2026-01-14