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Maxim Secure I2C Coprocessor, Now at Mouser

Mouser ElectronicsMouser Electronics is now stocking the DS2477 DeepCover secure I2C coprocessor from Maxim Integrated. The DS2477 provides additional levels of authentication and device integrity protection for industrial systems, medical sensors, and the Internet of Things (IoT) tools.


The Key Features of the device from Maxim includes:

  • Robust countermeasures protect against security attacks
    • Patented physically unclonable function secures device data
    • Actively monitored die shield detects and reacts to intrusion attempts
    • All stored data cryptographically protected from discovery
  • Efficient secure hash algorithm authenticates and manages peripherals
    • FIPS 202-compliant SHA-3 algorithm for bidirectional authentication
    • FIPS 198-compliant keyed-hash message authentication code (HMAC)
    • TRNG with NIST SP 800-90B compliant entropy source
  • Supplemental features enable easy integration into end applications
    • 2Kb of EEPROM for user data, key, and control registers
    • One open-drain GPIO pin
    • Unique and unalterable factory programmed
    • 64-bit identification number (ROM ID)
    • Large 1-wire block buffer (126 bytes) for efficient data transfer
    • 1-wire standard and overdrive timing communication speeds
    • I2C communication, up to 1MHz
    • 2.2V to 3.63V, -40°C to +85°C operating range
    • 6-pin TDFN-EP package (3mm x 3mm)

The DS2477 utilizes the ChipDNA output as key content to cryptographically secure all device-stored data. Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, which prevents discovery of the unique value used by the chip cryptographic functions. The ChipDNA circuit, a physically unclonable technology, uses a random variation of semiconductor device characteristics that naturally occur during wafer fabrication. The circuit generates a unique output value that is repeatable over time, temperature, and operating voltage, and provides a core set of cryptographic tools derived from integrated blocks.

Further information: Click here


Jyoti Gazmer

A Mass Comm. graduate believes strongly in the power of words. A book lover who dreams to own a library some day. An introvert but will become your closest friend if you share mutual feelings about COFFEE. I prefer having more puppies over humans.

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