PCA9544ADWR

Specialized Overview

The PCA9544ADWR is a quad bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus systems. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features four independent channels with a maximum on-resistance of 45 ohms. It includes active-low interrupt inputs and output logic, along with three address pins allowing up to eight devices on the bus. Operating temperatures range from -40°C to +85°C, housed in an SOIC-24 package.

Specialized Feature Summary

• Provides four independent bidirectional translating switches for I2C and SMBus signal routing
• Includes interrupt logic with active-low inputs and output for event monitoring
• Supports mixed-mode signal operation and accommodates multiple masters

Specialized Applications

• Extending I2C or SMBus buses in embedded systems
• Routing signals between microcontrollers and peripheral devices
• Managing multiple I2C devices sharing the same bus lines

Specialized Procurement Notes

Verify the specific suffix 'DWR' corresponds to the SOIC-24 tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the operating environment remains within the specified temperature and voltage limits to maintain signal integrity and device reliability during deployment.

Specialized Selection Notes

Select this component when four isolated I2C channels are required with interrupt capabilities. Compare against PCA9545A if simultaneous multi-channel activation is necessary, as this model supports only one active channel at a time. Verify that the 45-ohm on-resistance meets the system's signal integrity requirements for the target application speed.

Specialized Part Context

This part belongs to the PCA95xx family of interface ICs, which includes repeaters, switches, and expanders. It specifically addresses the need for bus isolation and protocol translation in complex I2C networks. The device complements other TI solutions like the PCA9515A repeater by providing switching functionality rather than simple buffering.

Specialized Replacement Considerations

The PCA9544APWR is a pin-compatible alternative in a TSSOP-20 package. For designs requiring simultaneous channel activation, the PCA9545A series offers multi-channel support. Verify package dimensions and thermal characteristics when substituting to ensure mechanical fit.