Dedicated IC Simplifies Implementation of a SHA-1 Based Token Authentication System
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.
title | Download file |
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DS2705 Data Sheet | DS2705.pdf |
Part Number | Functions | Interface | VSUPPLY (V) | Package/Pins | Oper. Temp. (°C) | Budgetary Price |
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See Notes | ||||||
DS2705 | SHA-1 Authentication SHA-1 Master | 1-Wire | 2.7 to 5.5 | µMAX/8 | -40 to +85 | $2.65 @1k |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
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DS2705U+ | Active | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | Lead Free |