PCA9538DBR

I/o Expanders Overview

The PCA9538DBR is a remote 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 an SSOP-16 package with a width of 5.30 mm. It includes configuration registers, an interrupt pin, and a reset pin for system control. The operating temperature range spans from -40°C to +85°C. This component serves as a low-power interface solution for expanding digital input and output capabilities in embedded systems.

I/o Expanders Feature Summary

• Supports I2C and SMBus communication protocols for remote data expansion
• Includes dedicated interrupt and reset pins for enhanced system management
• Configurable push-pull outputs via internal configuration registers

I/o Expanders Applications

• Remote I/O expansion in industrial control systems
• Interface extension for consumer electronics requiring low power consumption
• Embedded sensor networks utilizing I2C bus architectures

I/o Expanders Procurement Notes

Verify the specific suffix 'DBR' corresponds to the SSOP-16 tape and reel packaging format required for automated assembly processes. Confirm that the manufacturer status indicates end-of-life or obsolescence if long-term supply continuity is critical for the production timeline. Ensure compatibility with existing PCB footprints for the 16-pin small-shrink outline package before finalizing procurement orders.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expansion is needed with standard I2C connectivity. The 2.3 V minimum voltage allows operation in moderately low-voltage systems, while the 400 kHz speed suits general-purpose applications. Consider the SSOP-16 package constraints regarding board space and thermal dissipation compared to larger packages like SOIC or smaller QFN alternatives.

I/o Expanders Part Context

This part belongs to the PCA9538 family of I/O expanders from Texas Instruments. It shares core functional specifications with variants such as the PCA9538DGVR and PCA9538DWR, differing primarily in package type and manufacturing suffix. The DBR suffix specifically denotes the SSOP-16 form factor supplied in tape and reel, distinguishing it from tube-packaged or different footprint versions within the same logical series.

I/o Expanders Replacement Considerations

Publicly confirmed substitute part numbers include PCA9538DGVR and PCA9538DWR. Verify package compatibility and lead time availability for these alternatives if the primary component is discontinued.