DS2405+T&R

Specialized Overview

The DS2405+T&R is an addressable switch utilizing the 1-Wire protocol, featuring a factory-lasered 64-bit registration number for unique identification. It operates on a single bidirectional data line with parasitic power derived from the bus signal. The device includes an open-drain PIO pin capable of sinking greater than 4mA at 0.4V. Communication occurs at speeds up to 16.3kbits/s across a voltage range of 2.8V to 6.0V. Operating temperatures span from -40°C to +85°C. The package type is TSOC (6-pin), and it supports standard ROM commands including Match ROM and Search ROM for multidrop network control.

Specialized Feature Summary

• Open-drain PIO pin controlled by matching 64-bit laser-engraved registration number
• Zero standby power requirement using parasite power storage on internal capacitor
• Built-in multidrop controller ensuring compatibility with other MicroLAN products
• Direct connection to microprocessor port pins with logic level sensing capability

Specialized Applications

• Remote switching and sensing in MicroLAN networks
• Closed-loop control systems requiring absolute identity verification
• Multidrop bus configurations with independent device toggling

Specialized Procurement Notes

Verify the specific ordering suffix matches the required package configuration. Confirm that the tape-and-reel designation aligns with automated assembly requirements. Ensure the component meets the specified operating temperature range for the intended environment. Cross-reference the manufacturer part number with official distributor catalogs to confirm authenticity and current availability status before finalizing orders.

Specialized Selection Notes

Select this component when a unique electronic identification is required alongside remote switching capabilities. The DS2405 is suitable for applications needing zero standby power consumption via parasite power. Consider its compatibility with existing 1-Wire master controllers and the need for open-drain output characteristics. Evaluate the physical package constraints against the available TSOC, TO-92, or SOT-223 options.

Specialized Part Context

The DS2405 belongs to the Dallas Semiconductor 1-Wire family of devices, designed for low-cost, single-wire communication networks. It serves as a slave device within a system architecture managed by a central bus master. The component integrates memory for its unique serial number and control logic for the output switch, facilitating simple integration into embedded systems requiring secure node addressing.

Specialized Replacement Considerations

DS2405Z/T&R

Specialized FAQ

How does the DS2405 derive power during operation?

The device derives power entirely from the 1-Wire bus by storing energy on an internal capacitor during high signal periods, operating off this parasite supply during low times.

What is the function of the Active-Only Search ROM command?

This command allows the bus master to efficiently identify devices on a multidrop system that have their output pulldown turned on, distinguishing them from inactive devices.

Can multiple DS2405 devices operate on the same bus?

Yes, multiple DS2405s can reside on a common 1-Wire bus, where each is identified by its unique 64-bit registration number and can be toggled independently.