DS2477 Overview
Description
The DS2477 secure I2C coprocessor with built-in 1-Wire® master combines FIPS202-compliant secure hash algorithm (SHA-3) challenge and response authentication with Maxim’s patented ChipDNATM feature, a physically unclonable technology (PUF) to provide a cost-effective solution with the ultimate protection against security attacks. The ChipDNA implementation utilizes the random variation of semiconductor device characteristics that naturally occur during wafer fabrication.
Key Features
- a physically unclonable technology (PUF) to provide a cost-effective solution with the ultimate protection against security attacks
- The ChipDNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage
- The DS2477 utilizes the ChipDNA output as key content to cryptographically secure all device-stored data
- The DS2477 provides the SHA-3 and memory functionality required by a host system to communicate 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
- The 1-Wire line can be powered down under software control
