DS2705
ObsoleteSHA-1 Authentication Master
Dedicated IC Simplifies Implementation of a SHA-1 Based Token Authentication System
Overview
- Initiates Challenge-and-Response Authentication based on the SHA-1 Algorithm
- Dallas 1-Wire Master/Slave Interface Operates at Standard and Overdrive Speeds
- Input and Output pins for Initiating Challenge and Reporting Authentication Pass/Fail
- Programmable Configuration
- Operates from 2.5V to 5.5V Supply
- Tiny µMAX® Package (Pb-Free)
The DS2705 provides the master side of a Secure Hash Algorithm (SHA) based token authentication scheme. Hardware-based SHA authentication allows for security without the added cost and complexity of a microprocessor-based system. Batteries and other accessories are authenticated using a single contact through the Dallas 1-Wire® interface. Authentication is performed on demand or automatically, with the pass/fail status reported on open-drain output pins to signal the charge system and/or drive LEDs. The DS2705 stores a predetermined challenge-and-response pair in nonvolatile (NV) EEPROM. The DS2705 works in conjunction with Dallas Battery Management SHA-1 token products, including the DS2703 and DS2704.
Applications
- Cell Phones/Smartphones
- Cradle and Accessory Chargers
- Digital Cameras
- Portable DVD and Media Players
Documentation
This is the most up-to-date revision of the Data Sheet.
Software Resources
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