Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: DS2705
Edited by the Electronicstalk Editorial Team on 24 May 2006
IC masters battery identification
The DS2705 provides the master side of a secure hash algorithm-based (SHA) token authentication scheme and orchestrates the challenge/response sequence.
Dallas Semiconductor has released the DS2705, a SHA-1 authentication master The DS2705 provides the master side of a secure hash algorithm-based (SHA) token authentication scheme and orchestrates the challenge/response sequence
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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Residing within the host, the DS2705 works with Dallas Semiconductor's other battery-management SHA-1 token products that reside in the battery or accessory.
These latter products include the DS2703 SHA-1 battery-pack authentication IC and the DS2704 1280bit EEPROM with SHA-1 authentication.
Authentication with the DS2705 can be configured to initiate on host demand or automatically when a battery or accessory is inserted into a system.
The predetermined SHA-1 challenge-and-response pair is stored in the DS2705's nonvolatile EEPROM, which can be permanently locked to prevent corruption.
on completion of the challenge-and-response sequence between the master and token, the pass/fail status is conveniently reported on dedicated DS2705 port pins (one pin for pass and one for fail) to signal the charge system and/or drive LEDs.
This further simplifies system design and operation.
As all communication between the DS2705 master and the SHA-1 token product occurs through the Dallas Semiconductor 1-Wire interface, only one contact is needed between the host and battery/accessory.
Typical applications for the DS2705 include digital cameras, portable DVD and media players, cradle and accessory chargers, and cellphones/smartphones.
The device is available in tiny 8-pin micro SOP or micro MAX lead-free packages.
Prices start at $2.20 (10,000-up, FOB USA).
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