PCA9539DBR

I/o Expanders Overview

The PCA9539DBR is a 16-bit I/O expander from Texas Instruments, designed for low-power applications. It interfaces via I2C and SMBus protocols with a maximum clock frequency of 400 kHz. Operating within a voltage range of 2.3 V to 5.5 V, it features open-drain outputs capable of sourcing up to 25 mA. The device includes configuration registers, an interrupt output pin, and a reset pin. It is housed in a 24-pin SSOP package and supports operation temperatures from -40°C to +85°C.

I/o Expanders Feature Summary

• Supports I2C and SMBus serial communication interfaces
• Includes dedicated interrupt output and reset pins
• Features configurable input/output direction registers

I/o Expanders Applications

• Portable consumer electronics requiring extended I/O capabilities
• Industrial control systems utilizing I2C/SMBus networks
• Embedded systems needing remote I/O expansion

I/o Expanders Procurement Notes

Verify the specific suffix 'DBR' corresponds to the SSOP-24 tape-and-reel packaging format. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets before procurement. Ensure the supply chain source provides valid traceability for quality assurance purposes.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O expansion solution is required with I2C compatibility. Consider the SSOP-24 package constraints for PCB layout. Verify that the system voltage aligns with the 2.3 V to 5.5 V operating range and that the 400 kHz bus speed meets timing requirements.

I/o Expanders Part Context

This part belongs to the PCA9539 series of low-power I/O expanders. It shares functional similarities with other members like the PCA9539DB but differs in packaging. The DBR variant specifically denotes the surface-mount reel packaging, distinguishing it from tube-packaged equivalents.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9539DB (tube package) and TCA9539RTWR (WQFN package). Verify pinout compatibility and electrical specifications before swapping packages.