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DS1961S - 1kb Protected EEPROM iButton With SHA-1 Engine

General Description

The DS1961S combines 1024 bits of EEPROM, a 64-bit secret, an 8-byte register/control page with up to five user-read/write bytes, a 512-bit SHA-1 engine, and a fully featured 1-Wire interface in a rugged iButton.

Key Features

  • 1128 Bits of 5V EEPROM Memory Partitioned into Four Pages of 256 Bits, a 64Bit Write-Only Secret, and up to Five General-Purpose Read/Write Registers Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC (Message Authentication Code) as Authorization Secret and Data Memory can be WriteProtected (All or Page 0 Only) or put in EPROM-Emulation Mode (“Write to 0”, Page 1) On-Chip, 512-Bit SHA-1 Engine to Compute 160-Bit MACs and Generate S.

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Datasheet Details

Part number DS1961S
Manufacturer Dallas Semiconducotr
File Size 360.74 KB
Description 1kb Protected EEPROM iButton With SHA-1 Engine
Datasheet download datasheet DS1961S Datasheet

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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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DS1961S www.maxim-ic.com 1kb Protected EEPROM iButton With SHA-1 Engine SPECIAL FEATURES § 1128 Bits of 5V EEPROM Memory Partitioned into Four Pages of 256 Bits, a 64Bit Write-Only Secret, and up to Five General-Purpose Read/Write Registers Write Access Requires Knowledge of the Secret and the Capability of Computing and Transmitting a 160-Bit MAC (Message Authentication Code) as Authorization Secret and Data Memory can be WriteProtected (All or Page 0 Only) or put in EPROM-Emulation Mode (“Write to 0”, Page 1) On-Chip, 512-Bit SHA-1 Engine to Compute 160-Bit MACs and Generate Secrets Reads and Writes Over a Wide 2.8V to 5.25V Voltage Range from -40°C to +85°C Communicates to Host with a Single Digital Signal at 14.