Authorization, Key Management, and Memory Encryption

The first device in the AES family, the ATAES132A, is a high-speed, high-security, 32K Serial EEPROM that enables authentication and confidential nonvolatile data storage. It is a direct drop-in for industry standard Serial EEPROMS and is an easy way to add security to a system. The ATES132A includes a high-quality hardware Random Number Generator (RNG) paired with a Federal Information Processing Standards (FIPS) Deterministic Random Bit Generator (DRBG) to prevent replay attacks.

This ATAES132A uses the industry standard Advanced Encryption Standard (AES) algorithm in the CCM mode (Counter and Cipher block chaining Message authentication code) making authentication, confidentiality, and data integrity checking easy.

Data encryption and decryption can be easily performed for both internally stored data or for small external data packets (depending upon the configuration). Data encrypted by one AES device can be decrypted by another, and vice versa. The secure Serial EEPROM architecture of the ATAES132A and packages compatible with standard SPI and I2C EEPROM footprints allow direct insertion into many existing Serial EEPROM applications. A wide array of defense mechanisms are designed to prevent physical attacks on the device itself, as well as logical attacks on the data transmitted between the device and the system. All CryptoAuthentication devices, including the ATAES132A are equipped with secure personalization features to facilitate third-party product manufacturing.


  • Drop-in upgrade for existing sockets for high security applications
  • Single protocol authentication and encryption
  • Securely tracks events which is useful in evaluating warranty claims

Key Features

  • 32Kb Standard Serial EEPROM User Memory (16 User Zones of 2Kb)
  • AES Algorithm with 128-bit Keys
  • AES-CCM for Authentication
  • Secure Storage for 16 and 128 bit Keys
  • Encrypted User Memory Read and Write
  • FIPS Random Number Generator (RNG)
  • 16 High-Endurance Monotonic EEPROM Counters
  • Authentication Prior to Zone Access
  • Read/Write, Encrypted, or Read-only User Zone Options
  • SPI and I2C Interface Options
  • 2.5V to 5.5V Supply, <250nA Sleep
  • Serial EEPROM Compatible Pinout (SOIC, SOP, or UDFN)


Crypto element device running AES with hardware-based key storage and 32Kb EEPROM