BOB-11551

ATSHA204 Atmel CryptoAuthentication NOT RECOMMENDED FOR NEW DESIGNS Replaced by ATSHA204A DATASHEET Features  Secure authentication and validation device  Integrated capability for both Host and Client operations  Superior SHA-256 Hash algorithm with Message Authentication Code (MAC) and Hash-Based Message Authentication Code (HMAC) options  Best-in-class, 256-bit key length; storage for up to 16 keys  Guaranteed unique 72-bit serial number  Internal, high-quality Random Number Generator (RNG)  4.5Kb EEPROM for keys and data  512 OTP (One Time Programmable) bits for fixed information  Multiple I/O options   High-Speed, Single-Wire Interface 1MHz I2C interface  2.0V to 5.5V supply voltage range  1.8V to 5.5V communications 