Rainbow Electronics DS2705 - Manual

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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-Wire
Ò 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
Digital Cameras
Portable DVD and Media Players
Cradle and Accessory Chargers
Cell Phones/Smartphones
PIN CONFIGURATION
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)
APPLICATION EXAMPLE
ORDERING INFORMATION
PART TEMP RANGE MARKING PIN-PACKAGE
DS2705U+ -40°C to +85°C DS2705 mMAX
DS2705U+/T&R -40°C to +85°C DS2705 DS2705U+ in Tape-and-Reel
DS2705
SHA-1 Authentication Master
www.maxim-ic.com
mMAX
PASS
VDD
MDQ
SDQ
VPP
VSS
FAIL
CHAL
6
8
7
5
3
1
2
4
+ Denotes lead-free package.
1-Wire is a registered trademark of Dallas Semiconductor.