PCA9535ECDWR2G

I/o Expanders Overview

The PCA9535ECDWR2G is a 16-bit I/O expander manufactured by onsemi, operating within a voltage range of 2.3 V to 5.5 V. It supports I2C and SMBus interfaces with a maximum clock frequency of 400 kHz. The device features an interrupt output pin for efficient input monitoring without continuous bus polling. It includes configuration registers to set individual port directions and offers ESD protection rated at 2 kV. Designed for surface-mount applications, it operates across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital input/output channels expandable via serial communication protocols.
• Includes an interrupt output mechanism to signal microcontrollers regarding remote I/O input data changes.
• Features configurable direction control registers allowing flexible assignment of input or output states per pin.

I/o Expanders Applications

• Embedded systems requiring additional GPIO ports for sensor interfacing
• Industrial control panels needing extended input/output capabilities
• Consumer electronics utilizing low-power I2C peripheral expansion

I/o Expanders Procurement Notes

Verify the manufacturer designation matches onsemi specifications rather than legacy Texas Instruments or NXP documentation. Confirm the suffix '2G' aligns with current environmental compliance standards. Ensure the package type corresponds to the required PCB footprint during sourcing validation.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is necessary with support for both standard and fast-mode I2C speeds. Consider the 2.3 V minimum supply voltage for compatibility with lower power logic families. Evaluate the interrupt functionality requirements against simpler polling-based alternatives for system efficiency.

I/o Expanders Part Context

This part belongs to the PCA9535 family of 16-bit I/O expanders. It shares functional similarities with other industry-standard devices but is specifically branded and distributed by onsemi. The device maintains pin compatibility with related series while offering specific manufacturing attributes defined by the supplier.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9535DWR from Texas Instruments and the PCA9535PW from NXP. Verify that any replacement maintains identical pinout configurations and electrical characteristics to ensure seamless integration without hardware modifications.