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DS28E02 - 1-Wire SHA-1 Authenticator 1Kb EEPROM

General Description

The DS28E02 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the FIPS 180-3 Secure Hash Algorithm (SHA-1).

The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations.

Key Features

  • 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits.
  • On-Chip 512-Bit SHA-1 Engine to Compute 160Bit Message Authentication Codes (MACs) and to Generate Secrets.
  • Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC as Authorization.
  • User-Programmable Page Write Protection for Page 0, Page 3, or All Four Pages Together.
  • User-Programmable OTP EPROM Emulation Mode for Page 1 (“Write t.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ABRIDGED DATA SHEET Rev 0: 6/10 www.DataSheet4U.com 1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation General Description The DS28E02 combines 1024 bits of EEPROM with challenge-and-response authentication security implemented with the FIPS 180-3 Secure Hash Algorithm (SHA-1). The 1024-bit EEPROM array is configured as four pages of 256 bits with a 64-bit scratchpad to perform write operations. All memory pages can be write protected, and one page can be put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. Each DS28E02 has its own guaranteed unique 64-bit ROM registration number that is factory installed into the chip. The DS28E02 communicates over the single-contact 1-Wire® bus.