Analog Devices DS28E10 Product Info

• Dedicated Hardware-Accelerated SHA-1 Engine for Generating SHA-1 MACs
• One Page of 28-Byte User OTP EPROM
• Irreversible Write Protection
• Unique Factory-Programmed 64-Bit Identification Number
• 1-Wire Interface for Standard and Overdrive Speeds
• Communicates with Host at Up to 15.4kbps at Standard Speed or Up to 125kbps in Overdrive Mode
• Operating Range from 2.8V to 3.6V, -40°C to +85°C
• 3-Lead SOT23 and 6-Lead TSOC Packages
• ±6kV Human Body Model (HBM) ESD Protection (typ) on the 1-Wire and V_CC Pin

The DS28E10 combines secure challenge-and-response authentication functionality based on the FIPS 180-3 specified Secure Hash Algorithm (SHA-1) with 224 bits of one-time programmable user EPROM in a single chip. Once written, the memory is automatically write protected. Additionally, each device has its own guaranteed unique 64-bit ROM identification number (ROM ID) that is factory programmed into the chip. Memory writes are performed 4 bytes at a time. A secure and low-cost factory programming service is available to preprogram device data, including the SHA-1 security data components. The device communicates over the single-contact 1-Wire® bus. The communication follows the standard 1-Wire protocol with the ROM ID acting as node address in the case of a multidevice 1-Wire network.

Applications

• Reference Design License Management
• Sensor/Accessory Authentication and Calibration
• System Intellectual Property Protection