DS2482S-100+T&R

Controllers Overview

The DS2482S-100+T&R is a single-channel I²C-to-1-Wire bridge manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.9V to 5.5V and supports I²C clock frequencies up to 400kHz. The device functions as a 1-Wire master, supporting both standard (16kbps) and overdrive (142kbps) communication speeds. It features programmable active and strong pullup capabilities, including an output for external MOSFET control. Operating current is typically 750µA. The component is housed in an 8-SOIC package and is rated for industrial temperatures from -40°C to +85°C.

Controllers Feature Summary

• Performs bidirectional protocol conversion between I²C masters and downstream 1-Wire slave devices.
• Generates time-critical 1-Wire waveforms internally, relieving the host processor from precise timing requirements.
• Supports selectable active or passive pullup modes with slew-rate control to minimize line noise and EMI.
• Includes a dedicated output pin to control external circuitry for enhanced power delivery during high-current operations.

Controllers Applications

• Industrial sensors
• Medical instruments
• Printers

Controllers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging type and reel specifications. Ensure the component matches the required voltage and temperature ratings for the target application environment. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and availability status before finalizing procurement plans.

Controllers Selection Notes

Select this component when an I²C-based microcontroller requires direct interface with 1-Wire devices without software timing overhead. Consider the internal strong pullup capability if powering parasitic devices. Verify that the system I²C bus speed does not exceed 400kHz. Ensure address pins are configured correctly to avoid conflicts on the shared bus segment.

Controllers Part Context

This component belongs to the DS2482 series of serial-to-1-Wire bridges. It serves as a hardware solution for integrating Maxim Integrated's 1-Wire ecosystem into systems utilizing standard I²C interfaces. The device simplifies design by handling complex protocol sequencing and timing generation autonomously.

Controllers Replacement Considerations

Consult official datasheets for confirmed substitute part numbers. Verify compatibility regarding pinout, electrical characteristics, and functional behavior before implementing any alternative components in the design.

Controllers FAQ

How does the DS2482S handle 1-Wire timing?

The device uses internal, factory-trimmed timers to generate all time-critical 1-Wire waveforms, eliminating the need for the host processor to manage precise microsecond-level delays.

What is the purpose of the PCTLZ pin?

The PCTLZ pin is an active-low control output used to drive an external p-channel MOSFET, providing additional power to the 1-Wire line when the internal strong pullup is insufficient.

Can multiple DS2482S devices operate on the same I²C bus?

Yes, up to four devices can operate on the same bus segment by configuring the binary address inputs (AD0 and AD1) to assign unique I²C slave addresses.