STMicroelectronics ST25TV512-AD6G3

Overview

ST25TV512-AD6G3 from STMicroelectronics is an NFC Forum Type 5 contactless RFID tag IC compliant with ISO/IEC 15693, featuring 2-Kbit EEPROM, tamper-detect capability, TruST25 digital signature, and dual-mode privacy protection (Kill and Untraceable modes). It operates at 13.56 MHz, supports fast read up to 53 Kbit/s, and delivers 60-year data retention with 100 k write cycles - deployed in secure product authentication and anti-counterfeiting systems.

For engineers reviewing the ST25TV512-AD6G3 datasheet, ST25TV512-AD6G3 pinout, ST25TV512-AD6G3 application, or ST25TV512-AD6G3 equivalent, key selection considerations include RF interface security architecture, tamper-detect loop implementation, EAS activation logic, and three-area memory protection configuration using encrypted 32-bit passwords.

Technical Context

The ST25TV512-AD6G3 implements a fully autonomous ISO/IEC 15693 RF front-end with internal tuning capacitance (23 pF / 99.7 pF), enabling direct connection to external antenna coils without external matching components. Its digital core integrates dedicated hardware for TruST25 signature generation, 16-bit event counter with anti-tearing, and configurable EAS flag control.

Memory access is strictly block-oriented (4-byte blocks), with RF commands supporting single/multiple block reads/writes and proprietary fast-read sequences. Security sessions are stateful and mutually exclusive: presenting PWD_A1 closes any prior session and enables Area 1 access per AiSS register settings, while configuration writes require prior PWD_CFG presentation and LOCK_CFG = 0.

Key Specifications

Pinout & Package

ST25TV512-AD6G3 is supplied in a 5-pin DFN package (ECOPACK2, RoHS-compliant), with sawn and bumped wafer-level construction. The package exposes two antenna coil terminals and two tamper-detect loop pins; pin 5 (NC1) is not connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC/RFID tag applications.

Compared with ST25TV02K-AD6G3 and NT3H2111W0FHKH, the ST25TV512-AD6G3 uniquely combines tamper-detect hardware, TruST25 ECDSA signing, and three-area password protection - making it the sole option for applications requiring both physical intrusion detection and cryptographic device provenance.

Availability

ST25TV512-AD6G3 is available at Aetrix Electronics and suitable for luxury brand authentication, pharmaceutical serialization, industrial equipment lifecycle tracking, and smart document integrity verification requiring stable component supply and long-term obsolescence management.

Supply support for ST25TV512-AD6G3 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, analog ICs, MEMS, and secure RFID solutions for industrial, automotive, and consumer markets.

The ST25TV series targets high-assurance identification applications, with ST25TV512 specifically engineered to deliver hardware-rooted trust, physical tamper evidence, and NFC-based user interaction in regulated and premium-goods environments.

FAQ

What is the function of the TD0 and TD1 pins?

TD0 and TD1 form a dedicated tamper-detect loop interface that monitors continuity or short-circuit conditions on an external wire path. When the loop is broken or shorted, the IC sets a persistent tamper flag in the system configuration area (register TAMPER_DETECT), which remains asserted until device replacement - enabling forensic evidence of physical intrusion.

How does the TruST25 digital signature work?

TruST25 is a hardware-implemented ECDSA signature generator that binds the device's unique 64-bit UID with factory-programmed parameters. The signature is stored in a dedicated 256-bit EEPROM block and can be verified externally using ST's public key - proving the tag's origin and preventing cloning without access to ST's private key infrastructure.

Can the Kill mode be reversed after activation?

No - Kill mode is irreversible. When the Kill command (0xA6) is issued with the correct PWD_KILL and KILL_MUTE set, the IC permanently disables all RF communication. It will no longer respond to any ISO/IEC 15693 commands, including Inventory, and draws no power from the RF field - effectively rendering the tag electrically mute.

What memory organization options does ST25TV512 support?

ST25TV512 supports two configurations: three-area mode (Area 0: block 0; Area 1: blocks 1–7; Area 2: blocks 8–15) or two-area mode (Area 0: block 0; Area 1: blocks 1–15). Configuration is controlled by the MEM_ORG bit in register A1SS, and each area can be independently protected with 32-bit encrypted passwords for read/write access control.