Overview of Texas Instruments PCA9535DGVR

The Texas Instruments PCA9535DGVR is a robust, low-voltage 16-bit I²C-bus and SMBus I/O expander designed to provide general-purpose remote I/O expansion for most microcontroller families. This expander uses a two-wire serial interface that includes a bidirectional data bus, clock information, and addresses, making it an ideal choice for applications where additional I/Os are needed.

Key Features

• 16-bit Input/Output Port Expander: The PCA9535DGVR expands the I/O capabilities of a microcontroller by adding 16 additional input/output ports, which can be used for sensors, buttons, LEDs, and other peripherals.
• I²C and SMBus Compatibility: This device is compatible with the I²C-bus and SMBus standards, allowing for easy integration into existing systems with data transfer rates up to 400 kbit/s.
• Low Standby Current: Designed for power-sensitive applications, the PCA9535DGVR features a very low standby current, making it suitable for battery-powered and power-conserving designs.
• Wide Operating Voltage Range: The device supports a wide range of supply voltages from 2.3V to 5.5V, accommodating various logic levels and providing design flexibility.
• Interrupt Output: An interrupt output is provided, which can be connected to the interrupt input of a microcontroller, allowing the host to be alerted when an input state changes.
• Configurable Polarity: The polarity of the input port registers can be inverted, which simplifies the interface to sensors or other inputs with opposite logic signals.
• Robust Packaging: Offered in a compact TSSOP (DGVR) package, the PCA9535DGVR is designed for space-constrained applications.

Applications

The PCA9535DGVR is versatile and can be used across a wide range of applications, including:

• Servers
• Personal electronics
• Industrial controls
• Medical equipment
• Automotive systems

With its ability to operate across various voltage levels, interface with multiple microcontroller units, and provide additional I/O ports, the PCA9535DGVR is an excellent choice for designers looking to expand the capabilities of their systems without significant complexity or cost.