The PCA9535PWG4 is a robust I/O expander device from Texas Instruments, designed to provide additional I/O capabilities to microcontroller-based systems. This particular component is part of the expansive PCA953x family, which is known for its reliability and versatility in a wide range of applications.

Key Features

• 16-Bit I/O Ports: The PCA9535PWG4 features two 8-bit ports, totaling 16 I/Os, which can be individually set as inputs or outputs, providing flexibility for interfacing with various peripheral devices.
• I²C Interface: It operates via an I²C-bus/SMBus interface, supporting standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) I²C modes, making it compatible with a wide range of microcontrollers and processors.
• Interrupt Output: An interrupt output pin is available and is activated when any input state differs from its corresponding input port register, enhancing system response to input changes.
• Low Standby Current: This device is optimized for low power consumption, featuring a low standby current, which makes it suitable for battery-powered applications.
• Wide Operating Voltage: It operates over a wide voltage range from 2.3V to 5.5V, accommodating various logic levels and making it suitable for both 3.3V and 5V systems.
• Polarity Inversion: Input port polarity can be inverted, which is useful for adapting to different logic level requirements without additional circuitry.

Applications

The PCA9535PWG4 is used in a variety of applications where additional I/Os are needed. Its typical applications include:

• Servers
• Personal electronics
• Industrial control
• Home automation systems
• Medical equipment

Package and Quality

The PCA9535PWG4 comes in a TSSOP-24 (thin shrink small outline package) that is RoHS compliant and designed for surface-mount technology (SMT) assembly processes. Texas Instruments ensures high-quality standards, and the device is suitable for commercial and industrial temperature ranges, ensuring reliable performance in diverse environments.