1-Wire®-to-I2C Master Bridge

Extend I2C Slave Peripheral Communication Distance up to 100m

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The DS28E17 is a 1-Wire slave to I2C master bridge device that interfaces directly to I2C slaves at standard (100kHz max) or fast (400kHz max). Data transfers serially by means of the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS28E17 is guaranteed to have a unique 64-bit ROM registration number that serves as a node address in the 1-Wire network. Multiple DS28E17 devices can coexist with other devices in the 1-Wire network and be accessed individually without affecting other devices. The DS28E17 allows using complex I2C devices such as display controllers, ADCs, DACs, I2C sensors, etc. in a 1-Wire environment. Each self-timed DS28E17 provides 1-Wire access for a single I2C interface.

DS28E17: Typical Operating Circuit DS28E17: Typical Operating Circuit Enlarge+

Key Features

  • Converts 1-Wire Communication Protocol to I2C Master I/O
    • Operates I2C Slave Peripherals over the Single-Contact, 1-Wire Interface
  • Extend I2C Communication Distance with 1-Wire Protocol
    • 100 Meters (typ) in Standard Speed for a Properly Configured Network
  • Flexible 1-Wire Slave and I2C Master Operational Modes
    • Supports 15kbps and 77kbps 1-Wire Protocol with Packetized I2C Data Payloads
    • Factory-Programmed, Unique 64-Bit 1-Wire ROM ID Provides Unalterable Serial Number to End Equipment
    • Standard 100kHz and 400kHz Communication Rates for I2C
    • I2C Clock Stretching Automatically Supported
  • Low Power Consumption
    • 0.3µA (typ) in Sleep Mode
    • 2.6mA (typ) when Operational
    • Separate Pins for Sleep and Wakeup Flexibility
    • Remote Power Controlled by an Awake Pin
    • Sleep Mode Enabled by Sleep Pin or a 1-Wire Device Command
  • Easy to Integrate
    • 3.3V(nom) Supply, Small 4mm x 4mm x 0.75mm TQFN package, -40°C to +85°C Operation
    • Evaluation HW and SW Available


  • Accessory Identification and Control
  • ADCs/DACs
  • Display Controllers
  • I2C Sensors

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS28E17K: Evaluation System for DS28E17

Technical Documents

App Note 6208 Extending I2C Communication Distance with the DS28E17
Product Reliability Reports: DS28E17.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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