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Adafruit ATECC608 Breakout Board - STEMMA QT / Qwiic
Protect your embedded projects with hardware-based cryptographic security using the Adafruit ATECC608 Breakout Board – STEMMA QT / Qwiic. Built around the powerful ATECC608 secure element, this compact breakout board securely stores private keys and performs cryptographic operations internally, helping protect sensitive data from extraction and unauthorized access. It is ideal for IoT devices, authentication systems, secure communications, and embedded security applications.
Designed for easy integration, the board includes STEMMA QT / Qwiic connectors, allowing solderless plug-and-play connectivity over the I2C interface. Compatible with both 3.3V and 5V logic systems, it works seamlessly with Arduino, CircuitPython, Raspberry Pi, and other development platforms. The secure element supports ECDH key exchange, AES-128 encryption/decryption, SHA-256 hashing, HMAC operations, and hardware random number generation for robust security implementation.
This breakout is an excellent choice for developers building secure IoT applications, encrypted device authentication, digital identity solutions, and hardware trust systems without adding significant complexity to their designs. The board uses a fixed I2C address of 0x60 and is optimized for reliable communication at higher I2C speeds such as 400kHz.
Features
- Built around the Microchip ATECC608 secure crypto-authentication IC
- Secure storage of private keys inside hardware
- Supports challenge-response authentication for enhanced device security
- Hardware acceleration for:
- AES-128 encryption / decryption
- ECDH (Elliptic Curve Diffie-Hellman)
- SHA-256 hashing
- HMAC authentication
- Random Number Generation (RNG)
- Uses I²C communication interface for easy integration
- Integrated STEMMA QT / Qwiic connectors for solderless connection
- Compatible with Arduino, CircuitPython, Python, and C/C++
- Operates with both 3.3V and 5V logic systems
- Suitable for:
- Secure IoT devices
- Device authentication
- Hardware key storage
- Encrypted communication
- Secure boot applications
- Includes onboard support circuitry for quick prototyping and development
Specifications
- Product: Adafruit ATECC608 Breakout Board
- Secure Element: Microchip ATECC608
- Interface: I²C
- I²C Address: 0x60 (fixed)
- Operating Voltage: 3.3V – 5V
- Logic Level: 3.3V / 5V compatible
- Connector Type: STEMMA QT / Qwiic (JST-SH 4-pin)
- Communication Speed: Recommended 400kHz I²C when sharing bus
- Cryptographic Functions: AES-128, ECDH, SHA-256, HMAC
- Random Generator: Hardware RNG
- Platform Support: Arduino, Python, CircuitPython, C/C++
- Mounting: Breakout board with header pads + QT connectors
Pin Configuration
- VCC – Power input (3.3V or 5V)
- GND – Ground
- SCL – I²C Clock
- SDA – I²C Data
- STEMMA QT Ports – Plug-and-play I²C expansion connectors
Package Includes
- 1x Adafruit ATECC608 Breakout Board - STEMMA QT / Qwiic