1-Wire®-to-I²C Master Bridge

 

Part Number	Replacement	Explanation

Description

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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 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

Applications/Uses

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