PCA9534DWR

I/o Expanders Overview

The PCA9534DWR is an 8-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 interrupt output capabilities and configuration registers for flexible pin direction control. Packaged in a 16-pin SOIC format, it functions across an industrial temperature range of -40°C to +85°C. Key electrical specifications include a maximum output current of 25 mA and low power consumption with a typical operating current of 22 µA.

I/o Expanders Feature Summary

• Supports bidirectional data transfer via standard I2C and SMBus protocols
• Includes dedicated interrupt output pin for efficient event-driven monitoring
• Features configuration registers allowing individual pin direction setting

I/o Expanders Applications

• Portable systems requiring low-power I/O expansion
• Industrial control panels utilizing I2C communication
• Consumer electronics with limited microcontroller pins

I/o Expanders Procurement Notes

Verify the specific package variant against design requirements, as the DWR suffix denotes a SOIC-16 tape and reel configuration. Confirm that the 2.3 V minimum operating voltage aligns with the target system's power rail. Ensure ESD handling procedures are followed during assembly due to the sensitivity of CMOS logic inputs.

I/o Expanders Selection Notes

Select this component when an 8-bit expansion is sufficient for the application architecture. Compare against the PCA9538 if a hardware reset pin is required, or consider the TCA9534 if operation below 2.3 V is necessary. Validate that the SOIC-16 footprint matches the PCB layout constraints and thermal management strategy.

I/o Expanders Part Context

This part belongs to the PCA9534 family of remote I/O expanders. It shares functional similarities with other devices in the series but differs in package type and specific electrical characteristics. The DWR designation specifically identifies the surface-mount SOIC-16 packaging optimized for automated pick-and-place manufacturing processes.