DS28E02

PRODUCTION

1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation

Provides Low-Cost, Secure Bidirectional Authentication Over a Single Contact for Low-Power Applications

Data Sheet (Rev. 1)
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Part Details

  • 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits
  • On-Chip 512-Bit SHA-1 Engine to Compute 160-Bit 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 to 0")
  • Communicates to Host with a Single Digital Signal at 12.5kbps or 35.7kbps Using 1-Wire Protocol
  • Switchpoint Hysteresis and Filtering to Optimize Communication Performance in the Presence of Noise
  • Reads and Writes Over 1.75V to 3.65V Voltage Range from -20°C to +85°C
  • 6-Lead TSOC and TDFN Packages
DS28E02
1-Wire SHA-1 Authenticated 1Kb EEPROM with 1.8V Operation
DS28E02: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Application Note 1

Design Note 1

Technical Articles 9

Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Interface Transceivers & Isolators 1
DS2482-100
PRODUCTION Single-Channel 1-Wire Master
Processors & Microcontrollers 1
DS2460
PRODUCTION SHA-1 Coprocessor with EEPROM
Security & Authentication 1
DS28E10
PRODUCTION 1-Wire SHA-1 Authenticator
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Tools & Simulations

DeepCover® Security Lab

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Evaluation Kits

DS9120P

Socket Boards for Evaluating 1-Wire Devices

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Features and Benefits

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Product Details

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

DS9120

Socket Boards for Evaluating 1-Wire Devices

Buy Now View Details

Features and Benefits

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Product Details

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

DS9120Q

Socket Boards for Evaluating 1-Wire Devices

Buy Now View Details

Features and Benefits

  • Fully Compliant with DS9481R USB-to-1-Wire Adapter
  • Convenient On-Board Test Points
  • Jumper Disconnect/Connect Functionality
  • Meets RJ11 1-Wire Interface Standard
  • Include Connections for Various OTP EPROM Programming

Product Details

The DS9120 family of socket boards are RJ11-to-socket boards that provide the hardware connectivity necessary to evaluate and operate 1-Wire® products in an easy-to-use PC environment. Additionally, the socket boards can be readily used with the DS9481R USB-to1-Wire adapter to create a 1-Wire PC programmer for 1-Wire EEPROM and one-time programmable (OTP)/EPROM devices.

eval board
schematic 1
DS9481R-3C7

USB-to-1-Wire/iButton Adapter

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Features and Benefits

  • Driver Support for Windows® 11 and Windows 10 Operating Systems
  • Enumerates as a Virtual PC COM Port by Use of the Prolific PL-2303GC USB-to-UART Bridge IC
  • Emulates the DS2480B 1-Wire Line Driving Functionality
  • 1-Wire OTP/EPROM Programming Provided Without the Need of an External Power Supply (12V on OW, 7V on PULSE)
  • 3.3V Read/Write Operation to 1-Wire/iButton Devices
  • RJ11 Interface for Standard Connectivity Accessories such as the DS9120 Socket Adapter
  • Supports Standard and Overdrive 1-Wire Communication
  • Provides Strong Pullup to 3.3V
  • Fully Compliant with USB 2.0 Specification

Product Details

The DS9481R is a USB-to-1-Wire adapter for easy PC connectivity to 1-Wire devices. The adapter provides an RJ11 connector with the signals to communicate with all 1-Wire and iButton devices that support a 3.3V data I/O level. Additionally, the adapter provides the support and signaling to program 1-Wire/iButton EEPROM and one-time programmable (OTP)/EPROM devices. To provide a total hardware solution, the DS9481R can readily be used with the DS9120 socket adapter to create a 1-Wire PC programmer for 1-Wire peripheral devices (contact factory for more information). The equivalent peripheral hardware solution for the iButton is the DS1402D-DR8.
DS9120P
Socket Boards for Evaluating 1-Wire Devices
DS9120
Socket Boards for Evaluating 1-Wire Devices
DS9120Q
Socket Boards for Evaluating 1-Wire Devices
DS9481R-3C7
USB-to-1-Wire/iButton Adapter
DS9481R USB-to-1-Wire/iButton Adapter

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