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DS2703：SHA-1 Battery Pack Authentication IC

SHA-1 Battery-Pack Authentication IC Provides a Robust Cryptographic Solution to Ensure the Authenticity of Li+ Battery Packs for Portable Devices

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 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

DS2703: Typical Operating Circuit Applications/Uses 2.5G/3G Wireless Handsets Digital Still and Video Cameras Handheld or Notebook Computers and Terminals PDAs

DataSheet

Parametrics

Design kits & evaluation modules

• DS2703EVKIT

Quality and Environmental Data

• DS2703.pdf

Ordering Information