DS2483R+T

Controllers Overview

The DS2483R+T is a single-channel I²C-to-1-Wire bridge device manufactured by Analog Devices Inc./Maxim Integrated. It interfaces standard or fast I²C masters to downstream 1-Wire slave devices, performing protocol conversion without requiring host processor intervention for time-critical waveforms. The component supports both standard and overdrive 1-Wire communication speeds with user-adjustable timers for tRSTL, tMSP, tW0L, and tREC0. It features dual-voltage operation, allowing independent I²C voltages (1.8V, 3.3V, or 5.0V) and 1-Wire operating voltages from 3.3V to 5.0V. The device includes strong pullup capabilities for power delivery to slaves like EEPROMs and sensors, and offers a software-controllable sleep mode for minimal power consumption. It operates within a temperature range of -40°C to +85°C and is available in a 6-pin SOT-23 package.

Controllers Feature Summary

• Supports standard and overdrive 1-Wire communication speeds with adjustable timing parameters.
• Features built-in level translation allowing independent I²C and 1-Wire supply voltages.
• Includes active pullup and strong pullup functions to support parasitically powered devices.
• Offers software-controllable 1-Wire port power-down and low-power sleep modes.

Controllers Applications

• Printers
• Medical Instruments
• Industrial Sensors
• Cell Phones

Controllers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape/reel specifications. Ensure compatibility with system voltage requirements and interface standards before integration. Confirm availability status through authorized distributors as supply conditions may vary.

Controllers Selection Notes

Select this component when an I²C master requires connection to 1-Wire networks needing protocol translation. Consider the adjustable timing features if slave devices have non-standard timing requirements. Evaluate the need for strong pullup functionality if powering external 1-Wire devices directly through the bus.

Controllers Part Context

The DS2483R+T belongs to the DS2483 series of single-channel 1-Wire masters. It serves as a bridge between I²C hosts and 1-Wire peripherals, simplifying system design by offloading waveform generation from the main processor. The 'R' suffix typically denotes the reel packaging variant within the SOT-23-6 form factor.

Controllers Replacement Considerations

DS2484R+T: Dual-channel variant with similar interface capabilities.

Controllers FAQ

How does the DS2483 handle 1-Wire speed changes?

The DS2483 supports both standard and overdrive speeds. To switch to overdrive, the host must write to the Device Configuration register with the 1WS bit set to 1 immediately after sending the speed-changing command to the 1-Wire device.

What is the function of the Strong Pullup (SPU) feature?

Strong pullup provides additional current to the 1-Wire line, primarily used for parasitically powered devices like EEPROMs during memory copy operations or temperature sensors requiring higher power during conversion cycles.

Can the DS2483 operate with different voltages on its I²C and 1-Wire sides?

Yes, the device features built-in level translation, allowing the I²C side to operate at 1.8V, 3.3V, or 5.0V while the 1-Wire side operates independently between 3.3V and 5.0V.