مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

DS28E10 combines secure challenge-response authentication based on the SHA-1 algorithm specified in FIPS 180-3 with 224-bit one-time programmable user EPROM in a single chip. Once written, the memory is automatically write-protected. In addition, each device has a guaranteed unique 64-bit ROM identification number (ROM ID) that is factory-programmed into the chip. Memory write operations are performed 4 bytes at a time. Secure, low-cost factory programming services are available to pre-program device data, including SHA-1 secure data components. The device communicates via a single-contact 1-Wire bus. Communication follows the standard 1-Wire protocol, with the ROM ID serving as the node address in multi-device 1-Wire networks.

• Dedicated hardware-accelerated SHA-1 engine for SHA-1 MAC generation
• One page 28-byte user OTP EPROM
• Irreversible write protection
• Unique, factory-programmed 64-bit identification number
• 1-Wire interface in standard and overdrive modes
• Host communication speed up to 15.4kbps (standard speed) or 125kbps (overdrive mode)
• Operating range: 2.8V to 3.6V, -40℃ to ±85℃
• 3-pin SOT23, 6-pin TSOC packages
• 8kV HBM ESD protection (typical) on 1-Wire and VCC pins

DS28E10 integrates a 512-bit SHA-1 engine, secure data, 224-bit OTP EPROM, and 64-bit ROM ID in a single chip. Data is transmitted serially via the 1-Wire protocol, requiring only one data line and one ground line. In addition to serving as a unique data value in cryptographic SHA-1 computations, the device's 64-bit ROM ID can be used for electronic identification of devices using the DS28E10. In multi-drop 1-Wire network environments where multiple devices share a single 1-Wire bus and operate independently, the ROM ID can also serve as a node address.

Applications

• Reference design
• License management system
• Intellectual property protection
• Sensor/accessory authentication and calibration