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DS2705
SHA-1 Authentication Master

Dedicated IC Simplifies Implementation of a SHA-1 Based Token Authentication System


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Data Sheet
FULL DATA SHEET (PDF, 344kB)
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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® 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.

Key Features   Applications/Uses
  • 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 µMAX® Package (Pb-Free)

 
  • Cell Phones/Smartphones
  • Cradle and Accessory Chargers
  • Digital Cameras
  • Portable DVD and Media Players

    Key Specifications:   Battery ID Products
    Part Number Interface Features Supply Voltage (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    DS2705  1-Wire
    SHA-1 Master
    2.7 to 5.5 Yes µMAX/8 16 -40 to +85 $2.44 @ 1k
    See All Battery ID Products (4)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Evaluation Kits
  • DS2705K

    Design Guides
  • Battery Management (PDF)

    Reliability Reports
  • Reliability Report: DS2705.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-1 of 1

    DS2705 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS2705U+  
    µMAX;8 pin;16 mm²
    Outline Drawing: 21-0036 (PDF)
    Land Pattern: 90-0092 (PDF)
    Use pkgcode/variation: U8+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2006-05-22 

    Related Products
    DS2703 SHA-1 Battery Pack Authentication IC
    DS2704 1280-Bit EEPROM with SHA-1 Authentication

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    2007-08-02
    This page last modified: 2007-08-02


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