PCA9534ADWR

I/o Expanders Overview

The PCA9534ADWR is an 8-bit I/O expander from Texas Instruments designed for I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting low-power applications. The device features configurable input/output pins with interrupt output capabilities and configuration registers. It supports clock frequencies up to 400 kHz and includes ESD protection rated at 2 kV. Operating temperatures range from -40°C to +85°C. The component is housed in a 16-pin SOIC package and draws approximately 22 µA during operation.

I/o Expanders Feature Summary

• Configurable I/O ports allow flexible assignment of input or output functions via internal configuration registers.
• Interrupt output pin provides efficient event notification without continuous polling of the I/O status.
• Wide supply voltage compatibility enables integration into systems ranging from low-voltage digital logic to 5V standard interfaces.

I/o Expanders Applications

• Portable devices requiring extended GPIO functionality under strict power constraints
• Industrial control systems utilizing I2C/SMBus communication protocols
• Consumer electronics needing remote I/O expansion for peripheral management

I/o Expanders Procurement Notes

Verify the specific suffix 'DWR' corresponds to the SOIC-16 package and tape-and-reel packaging format as documented in official Texas Instruments datasheets. Confirm RoHS compliance status through current manufacturer documentation, as environmental declarations may be updated. Ensure the ordering part number matches the exact voltage and temperature grade specifications required for the target application environment.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expansion solution is needed with I2C interface compatibility. The wide 1.65 V to 5.5 V operating range makes it suitable for mixed-voltage systems. Consider the SOIC-16 package size for PCB layout constraints. Verify that the 400 kHz maximum clock frequency meets the system's bus speed requirements and that the interrupt capability aligns with the host controller's handling strategy.

I/o Expanders Part Context

The PCA9534 series belongs to Texas Instruments' portfolio of remote 8-bit I/O expanders. It serves as a functional alternative to other variants like the TCA9534, often differing in specific voltage thresholds or package options. This series is widely used in embedded systems where microcontroller pins are insufficient for all peripheral connections, providing a standardized method to extend digital I/O capabilities over serial buses.

I/o Expanders Replacement Considerations

The TCA9534ADWR is a public confirmed substitute part number offering similar functionality. Verify electrical parameter compatibility, particularly minimum supply voltage differences, before substitution. Package dimensions and pinout configurations should be checked to ensure mechanical interchangeability in existing designs.