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Maxim Integrated Products - SHA-1 Authentication Master

Numéro de référence DS2705
Description SHA-1 Authentication Master
Fabricant Maxim Integrated Products 
Logo Maxim Integrated Products 





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DS2705 fiche technique
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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.
APPLICATIONS
Digital Cameras
Portable DVD and Media Players
Cradle and Accessory Chargers
Cell Phones/Smartphones
APPLICATION EXAMPLE
DS2705
SHA-1 Authentication Master
PIN CONFIGURATION
CHAL
PASS
FAIL
VSS
18
27
36
45
mMAX
VDD
MDQ
SDQ
VPP
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)
ORDERING INFORMATION
PART
TEMP RANGE
DS2705U+
-40°C to +85°C
DS2705U+/T&R -40°C to +85°C
MARKING
DS2705
DS2705
PIN-PACKAGE
mMAX
DS2705U+ in Tape-and-Reel
+ Denotes lead-free package.
1-Wire is a registered trademark of Dallas Semiconductor.
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