Adafruit ATECC608 Breakout Board - STEMMA QT / Qwiic

The Adafruit ATECC608 Breakout Board is a compact crypto-authentication chip breakout with STEMMA QT / Qwiic connectors designed for secure key storage and cryptographic operations. It provides strong hardware security features to keep your private keys safe with a challenge-response mechanism that prevents secret key extraction even if the device firmware is accessible.

This breakout uses the latest Microchip ATECC608 chip which supports ECDH, AES-128 encrypt/decrypt/signing, hardware random number generation, SHA-256, and HMAC hashing, making it ideal for IoT and security-conscious projects. The board is compatible with 3.3V or 5V power/logic and connects via I2C (fixed address 0x60) with recommended 400kHz bus speed for reliability.

The board includes required support circuitry and a STEMMA QT connector for easy plug-and-play compatibility with other STEMMA QT / Qwiic enabled boards and peripherals without soldering.

• Microchip ATECC608 crypto-authentication chip
• I2C interface at fixed address 0x60, recommended 400kHz
• Supports ECDH, AES-128, SHA-256, HMAC, and hardware RNG
• Compatible with 3.3V and 5V logic levels
• STEMMA QT / Qwiic connector for easy connectivity
• Compact breakout PCB (25.5mm x 17.7mm x 4.7mm)
• Lightweight - 1.8g

Note: Clear Padlock and STEMMA QT cable sold separately. Refer to Microchip datasheets for ATECC508A and ATECC608A for detailed chip information. Software support available via Arduino and Microchip Cryptoauthlib libraries.

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