ATECC608A-MAHCZ-T

The ATECC608A-MAHCZ-T is Microchip’s CryptoAuthentication secure co-processor. It provides hardware-backed key storage and on-device cryptographic operations to protect devices from software-only attacks.
Key points:
- Interfaces and crypto: I2C interface; supports AES-128, SHA-256, and ECC cryptography (P-256) with ECDH/ECDSA, plus a true random number generator.
- Security model: key and data are stored in protected memory with fuse-programmed keys, secure zones, and tamper-resistant design; helps with secure root of trust, authentication, and integrity.
- Typical use cases: device identity/authentication, mutual TLS offload, secure boot/firmware signing, encrypted communications, and secure data storage for IoT devices.
- Software support: works with Microchip CryptoAuthentication libraries and example code for rapid integration.
- Packaging: the -MAHCZ-T variant denotes a specific package/temperature grading and tape-and-reel packaging within the ATECC608A family.
In short, it offloads cryptography from the host MCU while safeguarding keys, enabling secure IoT deployments.

These are functionally similar secure-authentication devices from other vendors (not direct pin-compatible drop-ins):
- Microchip: ATSHA204A; ATECC108A; ATECC508A (CryptoAuthentication family)
- STMicroelectronics: STSAFE-A110; STSAFE-A100
- NXP: A71CH
- Infineon: OPTIGA Trust M (and Trust B)

Here are the core features of the ATECC608A-MAHCZ-T:
- I2C-based crypto-authentication device with secure key storage
- Hardware cryptographic engine: ECC-256 (P-256) keys, ECDSA signatures, ECDH key agreement
- SHA-256 hashing and HMAC capability
- True random number generator
- Secure key/slot storage with configurable read/write protections and one-time programmable options
- Device-unique identity (serial) and support for secure certificate storage
- Data integrity and authenticity via MACs and signatures
- Low-power, compact implementation suitable for microcontroller integration
- Wide operating voltage (1.8–5.5 V) and industrial temperature range (-40°C to +85°C)
- Package: small 8-pin device (MAH CZ-T variant) with Tape & Reel packaging options
Optional note: designed to protect devices against cloning and tampering, with robust security zoning and lifecycle management.

- Pin count: 8 pins (8-pin package)
- Function: CryptoAuthentication secure element with an I2C interface for secure key storage and cryptographic operations (SHA-256 and ECC P-256), used for device authentication, secure provisioning, and data integrity.

- Manufacturer: Microchip Technology Inc.
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells microcontrollers, memory devices, and other ICs (including security/authentication devices like the ATECC608A).

ATECC608A-MAHCZ-T is a CryptoAuthentication secure element. It provides hardware-based key storage and a cryptographic engine (SHA-256, ECDH/ECDSA on P-256) plus a true random number generator. Application areas include:
- Secure device identity and mutual authentication with cloud services
- Secure provisioning and key management
- Firmware integrity, secure boot, and code signing
- Secure communications (TLS/MQTT with PSK or certificate-based auth)
- Anti-counterfeiting and device tamper resistance
- Secure data encryption keys and access control
Typical domains: IoT, industrial, automotive, medical, consumer electronics, wearables, smart meters, access control, robotics.

An 8-pin UDFN (2×3 mm) package.