PCA9538DW

I/o Expanders Overview

The PCA9538DW 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 eight general-purpose digital input/output pins with configurable polarity inversion registers. It includes dedicated interrupt output and reset pins for system management. The component is housed in a 16-pin SOIC package and functions across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Supports I2C and SMBus communication protocols for flexible bus integration
• Includes configuration registers to set individual pins as inputs or outputs
• Features interrupt output capability for efficient event-driven monitoring

I/o Expanders Applications

• Remote I/O expansion in embedded systems
• Interface extension for microcontrollers with limited GPIO
• Consumer electronics requiring low-power I/O control

I/o Expanders Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-16 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to implementation. Ensure design compatibility with the specified voltage and temperature ranges for the target application environment.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with I2C interface is required. Consider the 2.3 V to 5.5 V operating range for power supply compatibility. Evaluate the need for interrupt functionality and reset pin availability against system requirements. Compare package options if space constraints differ from the SOIC-16 form factor.

I/o Expanders Part Context

This part belongs to the PCA9538 series of low-voltage I/O expanders. It shares functional similarities with other devices in the family but differs in package type and specific electrical characteristics. The DW suffix denotes the SOIC-16 package variant, distinguishing it from tape-and-reel or other package configurations within the same product line.

I/o Expanders Replacement Considerations

Check for direct substitutes like the PCA9538DR (tape/reel version) or equivalent parts from other manufacturers such as NXP's PCA9538 variants. Verify pinout compatibility and register mapping before substitution.