DS2405P+T&R

Specialized Overview

The DS2405P+T&R is a 1-Wire addressable switch manufactured by Analog Devices Inc./Maxim Integrated. It features an open-drain PIO pin controlled by a unique, factory-lasered 64-bit registration number comprising an 8-bit family code (05h), a 48-bit serial number, and an 8-bit CRC. The device operates on a single bidirectional data line at speeds up to 16.3kbits/s with a supply voltage range of 2.8V to 6.0V. It draws zero standby power using parasite power from the bus. The component supports independent toggling and sensing of multiple units on a common multidrop network.

Specialized Feature Summary

• Open-drain N-channel output capable of sinking greater than 4mA at 0.4V
• Unique 64-bit laser-engraved identification for absolute identity assurance
• Embedded multidrop controller compatible with standard MicroLAN protocols
• Parasite power operation eliminates need for external VCC connection

Specialized Applications

• Multidrop sensor networks requiring unique node identification
• Remote control systems utilizing single-wire communication
• Access control nodes integrated into existing 1-Wire infrastructure

Specialized Procurement Notes

Verify the specific package variant against project requirements, as the base model offers TO-92, SOT-223, or TSOC options. Confirm tape-and-reel availability matches manufacturing automation needs. Check RoHS compliance status as older revisions may not meet current environmental standards. Ensure the supplier provides valid traceability documentation for the factory-lasered serial numbers.

Specialized Selection Notes

Select this component when precise individual addressing of switches on a shared bus is required without complex wiring. The 6-pin TSOC package suits surface mount designs needing compact footprints. Verify that the host microcontroller supports the 1-Wire protocol timing constraints. Consider the maximum sink capability and pull-up resistor values when designing the bus circuitry for reliable signal integrity across varying cable lengths.

Specialized Part Context

This part belongs to the DS2405 series of 1-Wire addressable switches. It shares the core ROM architecture and communication protocol with other devices in the MicroLAN family but differs in physical packaging and specific interface configurations. The T&R suffix indicates a tape-and-reel packaging format suitable for automated assembly processes.

Specialized Replacement Considerations

Direct replacements include the DS2405Z/T&R for SOT-223 packages or the standard DS2405/T&R for TO-92 packages. These variants maintain identical electrical characteristics and 1-Wire protocol compatibility while differing only in mechanical form factor.