Product Overview: Texas Instruments PCA9535RHLR

The PCA9535RHLR is a robust and versatile 16-bit I/O expander from Texas Instruments, designed to provide additional input/output (I/O) ports for a host controller operating via the I²C-bus. This device offers a convenient solution for expanding the available I/O pins, especially in microcontroller-based systems where additional pins are required for interfacing with switches, sensors, LEDs, and other peripherals.

Key Features

  
• 16-bit I/O Ports: The PCA9535RHLR features 16 I/O ports that can be individually configured as input or output, providing the flexibility to meet various application needs.
  
• I²C Interface: With an I²C-bus interface supporting standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes, the device ensures compatibility with a wide range of microcontrollers and systems.
  
• Low Standby Current: Optimized for power-sensitive applications, the PCA9535RHLR boasts a low standby current, making it ideal for battery-operated devices.
  
• Interrupt Output: An interrupt output pin is available to notify the host controller of changes in the input port status without the need for constant polling, thus improving system efficiency.
  
• Configurable Polarity: Input port polarity is configurable, allowing the user to adapt the device to the host system's specific needs.
  
• Built-In Oscillator: No external oscillator is required, as the PCA9535RHLR includes an integrated oscillator to reduce external component count.
  
• Power Supply Range: The device operates over a wide voltage range from 2.3V to 5.5V, accommodating various logic levels and ensuring compatibility with both 3.3V and 5V systems.

Applications

The PCA9535RHLR is suitable for a diverse array of applications, including:

  
• Server Infrastructure
  
• Industrial Control Systems
  
• Home Automation
  
• Consumer Electronics
  
• Portable Devices

Overall, the PCA9535RHLR by Texas Instruments is an excellent choice for designers looking to expand the I/O capabilities of their systems without increasing the complexity or cost of their design. Its ease of use, combined with its powerful features, makes it a valuable component in any I/O expansion task.