DS2484

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


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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.
DS2484: Typical Application Circuit DS2484: Typical Application Circuit Enlarge+

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
Part NumberFunctionsVSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
See Notes
DS2484 1-Wire Bridge1.71 to 5.25
SOT/6
TDFN/8
-40 to +85$0.66 @1k
See All 1-Wire Interface Products (9)
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.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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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