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Data Sheet

FULL DATA SHEET (PDF, 376kB) Download   E-Mail

Description

The DS2703 provides a robust cryptographic solution to ensure the authenticity of Li-Ion battery packs for cell phone, PDA, and portable computing devices. The DS2703 employs the Secure Hash Algorithm (SHA-1) specified in the Federal Information publication 180-1 and 180-2, and ISO/IEC 10118-3. SHA-1 is designed for authentication—just what is required for identifying battery packs manufactured by authorized sources. The device's SHA-1 engine processes a host transmitted challenge using its stored 64-bit secret key and unique 64-bit ROM ID to produce a 160-bit response word for transmission back to the host. The secret key is securely stored on-chip and never transmitted between the battery and the host. A DS2703-based system produces a high degree of authentication security between a host system and its removable battery or other peripheral devices. The Thermistor Multiplexer feature allows a three contact battery pack configuration to support data and thermistor functions. When activated through 1-Wire® command, the THM pin presents the thermistor impedance on the data contact and disconnects internal loading from the node.

Key Features		Applications/Uses
Secure Challenge and Response Authentication Using the SHA-1 Algorithm Directly Powered by the Dallas 1-Wire Interface with 16kbps Standard and 143kbps Overdrive Communication Modes Unique 64-Bit Serial Number Thermistor Multiplexer Operates with VPULLUP as Low as 2.7V Pb-Free 8-Pin µMAX® or 2mm x 3mm TDFN Package		2.5G/3G Wireless Handsets Digital Still and Video Cameras Handheld or Notebook Computers and Terminals PDAs

Application Notes

Application Note 4080: Communication Flowchart for the DS2703 - DS2703

Evaluation Kits

none

Reliability Reports

Reliability Report: DS2703.pdf

Software/Models

none

Ordering Information
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. More: SeeFull Data Sheet or Part 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.
Devices: 1-3 of 3
DS2703	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2703G-C1+T&R			TDFN;8 pin; Dwg: 21-0174B (PDF) Use pkgcode/variation: T823+1*	-40°C to +85°C	See data sheet Materials Analysis
DS2703K			TDFN;6 pin; Dwg: 21-0137I (PDF) Use pkgcode/variation: T633+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2703U+			uMAX;8 pin; Dwg: 21-0036K (PDF) Use pkgcode/variation: U8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2005-02-22

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

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