Crypto-authentication, SHA, I²C, SOIC-8

Fast, secure, and cost-effective symmetric authentication

The Microchip SHA-based CryptoAuthentication crypto-element devices are designed to provide flexible, user-configurable security to enable a wide range of authentication models. The ATSHA204A is the first device in the SHA device group. The ATECC108A and ATECC508A are supersets of the ATSHA204A and are therefore forward compatible. Like all CryptoAuthentication building blocks, the ATSHA204A is easy to develop without requiring crypto knowledge.

Secure Hash Algorithm (SHA) algorithms are widely used in most cryptographic systems and remain an important component in most modern authentication protocols. These devices support the SHA-256 standard. The ATSHA204A is the most cost-effective solution in the Microchip CryptoAuthentication portfolio. It integrates the SHA-256 hash algorithm with a 4.5 KB EEPROM and provides robust hardware authentication with secure key/data storage. The tiny housing and single-wire interface make it ideal for handheld electronic systems and all small-footprint embedded systems.

Key features