ATSHA204A-STUCZ-T

The Microchip ATSHA204A is a full turnkey security device. It includes a 4.5Kb EEPROM divided into 16 slots. This array can be used for storage of keys, miscellaneous read/write, read-only, password or secret data, and consumption tracking. Access to the various sections of memory can be restricted in a variety of ways and then the configuration locked to prevent changes.Access to the chip is through a standard I²C interface at speeds up to 1Mb/sec. The chip also supports a single-wire interface that can reduce the number of GPIOs required on the system processor and/or reduce the number of pins on connectors. It is compatible with most UART or serial I/O controllers. System integration is eased with a wide supply voltage range and an ultra-low sleep current of less than 100nA.

• ATSHA204A crypto element device
• Crypto element with protected hardware-based key storage
• Secure symmetric authentication device host and client operations
• Superior SHA-256 hash algorithm with MAC and 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 bit OTP (One Time Programmable) bits for fixed information
• UART-compatible high-speed, single-wire interface, 1MHz I2C interface
• Sleep current150nA