ATSHA204 Authentication Breakout

PROPC-011551


The Atmel ATSHA204 is an optimized authentication chip that includes a 4.5Kb EEPROM. 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.

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Each ATSHA204 ships with a guaranteed unique 72-bit serial number. Using the cryptographic protocols supported by the chip, a host system or remote server can prove that the serial number is both authentic and not a copy. The ATSHA204 can generate high-quality random numbers and employ them for any purpose, including usage as part of the crypto protocols of this chip.

Features:

  • Supply Voltage: 2.0-5.5V
  • Integrated capability for both host and client operations
  • Superior SHA-256 hash algorithm, HMAC option
  • 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)
  • 4.5-Kbit EEPROM for keys and data
  • 512 OTP (One Time Programmable) bits for fixed information
  • Sleep Current: <150nA

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