PCA9539DWR

I/o Expanders Overview

The PCA9539DWR is a 16-bit I/O expander from Texas Instruments, designed for I2C and SMBus interfaces. 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 an interrupt output, configuration registers, and a reset pin. It is housed in a TSSOP-24 package with surface mount installation. Operating temperatures span from -40°C to +85°C, with ESD protection rated at 2 kV.

I/o Expanders Feature Summary

• Supports I2C and SMBus serial communication protocols
• Includes dedicated interrupt output capability
• Features configuration registers and a reset pin

I/o Expanders Applications

• Portable systems requiring low power consumption
• Consumer electronics utilizing I2C buses
• Industrial control applications needing extended I/O

I/o Expanders Procurement Notes

Verify the specific suffix DWR indicates the tape and reel packaging format distinct from tube variants. Confirm the manufacturer part number matches official Texas Instruments documentation to ensure authenticity. Check RoHS compliance status through authorized channels before procurement.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is required on an I2C bus. Ensure the system voltage falls between 2.3 V and 5.5 V. Verify that the TSSOP-24 package fits the PCB layout constraints compared to SSOP or VQFN alternatives.

I/o Expanders Part Context

This part belongs to the PCA9539 series of low-power I/O expanders. It shares functional similarities with the PCA9535 but offers different internal configurations. The DWR suffix specifically denotes the reel packaging used for automated assembly processes.

I/o Expanders Replacement Considerations

The PCA9539DB serves as a tube-packaged alternative within the same family. The TCA9539PWR offers similar functionality with a wider voltage range starting at 1.65 V.