DS2705

www.DataSheet4U.com DS2705 SHA-1 Authentication Master www.maxim-ic.com GENERAL DESCRIPTION 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-WireÒ 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-andresponse pair in nonvolatile (NV) EEPROM. The DS2705 works in conjunction with Dallas Battery Management SHA-1 token products, including the DS2703 and DS2704. PIN CONFIGURATION CHAL PASS FAIL 1 2 3 4 8 7 6 5 VDD MDQ SDQ VPP VSS mMAX FEATURES § § 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 mMAX Package (Pb-Free) APPLICATIONS Digital Cameras Portable DVD and Media Players Cradle and Accessory Chargers Cell Phones/Smartphones § § § § APPLICATION EXAMPLE ORDERING INFORMATION PART DS2705U+ DS2705U+/T&R TEMP RANGE MARKING DS2705 DS2705 PIN-PACKAGE mMAX DS2705U+ in Tape-and-Reel ...