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Single-Channel 1-Wire Master with Adjustable Timing and Sleep Mode

Best-in-Class Integrated 1-Wire Line Driver Facilitates Protocol Conversion Between I2C Host and 1-Wire Slave Network

Product Details

The DS2484 is an I2C-to-1-Wire® bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform protocol conversion between the I2C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2484 is a 1-Wire master. Internal, user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds. In addition, the 1-Wire bus can be powered down under software control. The dual-voltage operation allows different operating voltages on the I2C and 1-Wire side. Strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. When not in use, the DS2484 can be put in sleep mode where power consumption is minimal.

Key Features

  • I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds
  • Standard and Overdrive 1-Wire Communication Speeds
  • Adjustable 1-Wire Timing for tRSTL, tMSP, tW0L, and tREC0
  • 1-Wire Port Can Be Powered Down Under Software Control
  • Supports Power-Saving Sleep Mode (SLPZ Pin), Where the 1-Wire Port is in High Impedance
  • I2C Operating Voltages: 1.8V ±5%, 3.3V ±10%, and 5.0V +5/-10%
  • Built-In Level Translator: 1-Wire Operating Voltage from 1.8V -5% to 5.0V +5%, Independent of I2C Voltage
  • Built-In ESD Protection Level of ±8kV Human Body Model (HBM) Contact Discharge on IO Pin
  • -40°C to +85°C Operating Temperature Range
  • 8-Pin TDFN and 6-Pin SOT23 Packages

Applications/Uses

  • Cell Phones
  • Industrial Sensors
  • Medical Instruments
  • Printers
Parametric specs for 1-Wire Interface Products
Functions 1-Wire Bridge
VSUPPLY (V) 1.71 to 5.25
Package/Pins SOT23/6
TDFN/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$0.69 @1k
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Simplified Block Diagram

DS2484: Typical Application Circuit DS2484: Typical Application Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The DS2484 evaluation system (EV system) consists of a DS2484 evaluation kit (EV kit) and a DS9400 USB-to-I2C adapter. The DS2484 is an I2C-to-1-Wire® bridge device that performs protocol conversion from an I2C master to any attached 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2484 is a 1-Wire master. The evaluation software runs under a Windows® 7, Windows 8, or Windows XP® operating system (OS), providing a handy user interface to exercise the features of the DS2484.
Order the DS2484EVKIT# for the complete EV system to evaluate the DS2484 using a PC. Evaluation software for the EV system is also available on our website at: www.maximintegrated.com/evkit.

View Details

Features

  • I2C Host Interface Supports 100kHz and 400kHz
  • I2C Communication Speeds
  • I2C Operating Voltages: 1.8V ±5% and 3.3V ±5%
  • 1-Wire Operating Voltage: 1.8V ±5% and 3.3V ±5%
  • EV Kit Contains a Mounted 6-Pin SOT23 DS2484R+T IC
  • Convenient On-Board Test Points and TO-92 Socket
  • Standard RJ11 Connector Interfaces to DS9120 Socket Boards
  • Downloadable Evaluation Software

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Support & Training

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Parameters

Parametric specs for 1-Wire Interface Products
Functions 1-Wire Bridge
VSUPPLY (V) 1.71 to 5.25
Package/Pins SOT23/6
TDFN/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$0.69 @1k

Key Features

  • I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds
  • Standard and Overdrive 1-Wire Communication Speeds
  • Adjustable 1-Wire Timing for tRSTL, tMSP, tW0L, and tREC0
  • 1-Wire Port Can Be Powered Down Under Software Control
  • Supports Power-Saving Sleep Mode (SLPZ Pin), Where the 1-Wire Port is in High Impedance
  • I2C Operating Voltages: 1.8V ±5%, 3.3V ±10%, and 5.0V +5/-10%
  • Built-In Level Translator: 1-Wire Operating Voltage from 1.8V -5% to 5.0V +5%, Independent of I2C Voltage
  • Built-In ESD Protection Level of ±8kV Human Body Model (HBM) Contact Discharge on IO Pin
  • -40°C to +85°C Operating Temperature Range
  • 8-Pin TDFN and 6-Pin SOT23 Packages

Applications/Uses

  • Cell Phones
  • Industrial Sensors
  • Medical Instruments
  • Printers

Description

The DS2484 is an I2C-to-1-Wire® bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform protocol conversion between the I2C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2484 is a 1-Wire master. Internal, user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds. In addition, the 1-Wire bus can be powered down under software control. The dual-voltage operation allows different operating voltages on the I2C and 1-Wire side. Strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. When not in use, the DS2484 can be put in sleep mode where power consumption is minimal.

Simplified Block Diagram

DS2484: Typical Application Circuit DS2484: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal