PCA9538DWR

I/o Expanders Overview

The PCA9538DWR is an 8-bit I/O expander designed for I2C and SMBus interfaces, manufactured by Texas Instruments. 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 interrupt output capabilities and includes configuration registers, an interrupt pin, and a reset pin. It is housed in a 16-pin SOIC package with surface-mount installation. The component functions reliably across an operating temperature range from -40°C to +85°C and provides ESD protection rated at 2 kV.

I/o Expanders Feature Summary

• Supports I2C and SMBus serial communication protocols for system integration
• Includes dedicated interrupt output pin for efficient event handling
• Features internal configuration registers for flexible I/O direction control
• Provides hardware reset functionality via a dedicated reset pin

I/o Expanders Applications

• Portable consumer electronics requiring low power I/O expansion
• Industrial control systems utilizing I2C bus architectures
• Embedded devices needing additional general-purpose input/output lines

I/o Expanders Procurement Notes

Verify the specific suffix 'DWR' corresponds to the SOIC-16 package and reel packaging format when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the supplier provides valid traceability records matching the Texas Instruments part number to avoid counterfeit components.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with I2C interface is required for designs operating between 2.3 V and 5.5 V. Consider the SOIC-16 package constraints for PCB layout. Verify that the 400 kHz maximum clock speed meets the system timing requirements. Check if the interrupt capability is necessary for the specific application logic compared to polling methods.

I/o Expanders Part Context

This part belongs to the PCA9538 series of remote 8-bit I/O expanders. It shares core functional specifications with variants like PCA9538DW and PCA9538DBR, differing primarily in package type and shipping format. The DWR suffix specifically denotes the SOIC-16 package delivered in reel form for automated assembly processes.

I/o Expanders Replacement Considerations

PCA9538DW (SOIC-16 tube), PCA9538DBR (SSOP-16 reel). Verify package dimensions and pinout compatibility before substitution.