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DS2705

Description
SHA-1 Authentication Master
File Size211KB,18 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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DS2705 Overview

SHA-1 Authentication Master

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-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.
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
-40°C to +85°C
-40°C to +85°C
+ Denotes lead-free package.
1-Wire is a registered trademark of Dallas Semiconductor.
1 of 18
050506

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DS2705 DS2705U DS2705UT
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