DS2477 Datasheet | Maxim Integrated

Click here for production status of specific part numbers. EVALUATION KIT AVAILABLE Deep Cover Secure SHA-3 Coprocessor with Chip DNA PUF Protection General Description The DS2477 secure I2C coprocessor with built-in 1-Wire® master bines FIPS202-pliant secure hash algorithm (SHA-3) challenge and response authentication with Maxim’s patented Chip DNATM feature, a physically unclonable technology (PUF) to provide a cost-effective solution with the ultimate protection against security attacks. The Chip DNA implementation utilizes the random variation of semiconductor device characteristics that naturally occur during wafer fabrication. The Chip DNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage. Attempts to probe or observe Chip DNA operation modifies the underlying circuit characteristics thus preventing discovery of the unique value used by the chip cryptographic functions. The DS2477 utilizes the Chip DNA output as key content to cryptographically secure all device-stored data. With Chip DNA capability, the device provides a core set of cryptographic tools derived from integrated blocks including a SHA-3 engine, a FIPS/NIST pliant true random number generator (TRNG), 2Kb of secured EEPROM, and a unique 64-bit ROM identification number (ROM ID). The unique ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application. The DS2477 provides the SHA-3 and memory functionality required by a host system to municate with and operate a 1-Wire SHA-3 slave. In addition, it performs protocol conversion between the I2C master and any attached 1-Wire SHA-3 slaves. For 1-Wire line driving, internal user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire munication speeds. The 1-Wire line can be powered down under software control....