Maxim > Products > Power and Battery Management > DS2705

DS2705

SHA-1 Authentication Master

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

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

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.

Data Sheet

Download	Rev 3	(PDF, 344kB)
E-Mail

An evaluation kit is available: DS2705EVKIT

NOTE: This product uses the following:
DS2705K Evaluation Kit Software

Key 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 µMAX® Package (Pb-Free)

Applications/Uses

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

Key Specifications:

Battery ID Products

Part Number

Interface

Features

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

max w/pins

See Notes

DS2705

1-Wire

SHA-1 Master

2.7 to 5.5

µMAX/8

16.2

-40 to +85

$2.64 @1k

See All Battery ID Products (4)

Pricing 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.

Diagram

Block Diagram

Reliability Reports

Reliability Report:

DS2705.pdf

Software/Models

DS2705K Evaluation Kit Software

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2705U+			Active	µMAX;8 pin;16.2 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

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* 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.

Similar Products by Function

DS2703	SHA-1 Battery Pack Authentication IC
DS2704	1280-Bit EEPROM with SHA-1 Authentication
See All Battery ID Products (4 Products)

Similar Products by Application

Battery Management > Battery Identification and Authentication

Evaluation Kits

DS2705EVKIT

Evaluation Kit for the DS2705

Products with Similar Part Numbers