PCA9535DWR

I/o Expanders Overview

The PCA9535DWR is a 16-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 interrupt output capability and is housed in a SOIC-24 surface-mount package. It includes configuration registers and power-on reset (POR) functionality to ensure defined initial states. The component is suitable for applications requiring extended GPIO capabilities over standard serial buses.

I/o Expanders Feature Summary

• Provides 16-bit general-purpose input/output expansion via I2C and SMBus protocols
• Includes dedicated interrupt output pin for efficient event handling
• Operates with low power consumption suitable for battery-powered systems

I/o Expanders Applications

• Portable devices requiring additional GPIO pins
• Industrial control systems using I2C/SMBus networks
• Consumer electronics with limited microcontroller pins

I/o Expanders Procurement Notes

Verify the specific suffix 'DWR' corresponds to the SOIC-24 tape-and-reel packaging when ordering. Confirm RoHS compliance status through official datasheets or manufacturer documentation prior to procurement. Ensure compatibility with system voltage levels ranging from 2.3 V to 5.5 V. Check for any recent product change notices affecting pinout or electrical characteristics.

I/o Expanders Selection Notes

Select this component when 16-bit I/O expansion is required over I2C or SMBus interfaces. Ensure the host controller supports the necessary clock speeds up to 400 kHz. Verify that the SOIC-24 package fits the PCB layout constraints. Consider the 2.3 V minimum operating voltage if designing for low-power applications.

I/o Expanders Part Context

The PCA9535DWR belongs to the PCA9535 series of 16-bit I/O expanders from Texas Instruments. This series is widely used in embedded systems for extending digital input and output lines. The DWR suffix specifically denotes the SOIC-24 surface-mount package variant, distinguishing it from other package options like TSSOP or QFN available in the same family.

I/o Expanders Replacement Considerations

The PCA9535DW is a tube-packaged alternative within the same functional family. Other compatible parts include the PCA9535PWR (TSSOP-24) and PCA9535DBQR (QSOP-24). Verify pin compatibility and package dimensions before substitution.