DS2482X-101+U

Controllers Overview

The DS2482X-101+U 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 bidirectional protocol conversion. The component operates within a supply voltage range of 2.9V to 5.5V and supports an operating temperature range from -40°C to +85°C. It features internal factory-trimmed timers for standard and overdrive 1-Wire speeds, programmable strong pullup capabilities, and slew-rate control on 1-Wire edges. The device utilizes a 9-bump WLP package.

Controllers Feature Summary

• Enables direct interface between I²C microprocessors and 1-Wire slave devices through bidirectional protocol conversion.
• Provides programmable active and strong pullup features to support power delivery to various 1-Wire peripherals.
• Includes slew-controlled 1-Wire edges to minimize line noise and reduce system electromagnetic interference.
• Integrates two binary address inputs to resolve potential conflicts with other I²C slave devices on the same bus.

Controllers Applications

• Printers
• Medical Instruments
• Industrial Sensors

Controllers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and environmental compliance. Confirm availability status directly with authorized distributors as supply conditions may vary. Ensure the selected variant matches the required pin configuration and thermal specifications for the target application environment.

Controllers Selection Notes

Select this component when an I²C host requires communication with 1-Wire slaves without generating time-critical waveforms. Consider the 9-bump WLP package for space-constrained designs. Evaluate the need for external MOSFET control via the PCTLZ pin if parasitically powered sensors require higher current than the internal strong pullup can provide.

Controllers Part Context

This part belongs to the DS2482X series of single-channel 1-Wire masters. It serves as a bridge between I²C buses and 1-Wire networks, handling reset/presence detection, read/write operations, and ROM search sequences autonomously. The X-series designation typically indicates variations in packaging or specific feature sets compared to base models.

Controllers Replacement Considerations

DS2482S-100+T&R (SOIC package)

Controllers FAQ

How does the DS2482X-101+U handle 1-Wire timing requirements?

Internal, factory-trimmed timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive communication speeds.

What is the function of the PCTLZ output pin?

The PCTLZ output controls an optional external p-channel MOSFET to deliver additional power to the 1-Wire line for devices requiring higher source current modes.

How is the I²C slave address assigned?

The I²C slave address is controlled by two binary address inputs (AD0 and AD1), allowing up to four devices to operate on the same bus segment without a hub.