Description

The DS2703 provides a robust cryptographic solutionto ensure the authenticity of Li-Ion battery packs forcell phone, PDA, and portable computing devices.The DS2703 employs the Secure Hash Algorithm(SHA-1) specified in the Federal Informationpublication 180-1 and 180-2, and ISO/IEC 10118-3.SHA-1 is designed for authentication—just what isrequired for identifying battery packs manufacturedby authorized sources.The device's SHA-1 engine processes a hosttransmitted challenge using its stored 64-bit secretkey and unique 64-bit ROM ID to produce a 160-bitresponse word for transmission back to the host. Thesecret key is securely stored on-chip and nevertransmitted between the battery and the host. ADS2703-based system produces a high degree ofauthentication security between a host system and itsremovable battery or other peripheral devices.The Thermistor Multiplexer feature allows a threecontact battery pack configuration to support dataand thermistor functions. When activated through1-Wire® command, the THM pin presents thethermistor impedance on the data contact anddisconnects internal loading from the node.Applications2.5G/3G Wireless HandsetsDigital Still and Video CamerasHandheld or Notebook Computers and TerminalsPDAs