NXP PCA9534BS I/O Expander

The NXP PCA9534BS is a sophisticated Remote 8-bit I/O expander for the I²C-bus with interrupt functionality. Designed to provide general-purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I²C), this device is an ideal solution for applications where additional I/Os are needed.

Key Features

• 8-bit I/O Expander: The PCA9534BS provides eight programmable I/O pins, allowing for a versatile addition of inputs or outputs to your microcontroller-based system.
• I²C Interface: It supports a fast I²C-bus interface with speeds up to 400 kHz, enabling quick communication with a host controller.
• Interrupt Output: An interrupt output is available and can be triggered by input changes, thus reducing the need for the microcontroller to poll the expander, saving valuable processor time.
• Low Standby Current: The device is optimized for low power consumption, drawing a low standby current which is ideal for battery-powered applications.
• Configurable Polarity: Input and output configuration is user-definable, and polarity inversion is supported, providing flexibility in interfacing with peripheral devices.
• Built-in Oscillator: No external components are required for the oscillator, simplifying the circuit design and reducing the overall bill of materials.
• Address Pins: Three hardware address pins allow the use of up to eight devices on the same bus, enabling a system expansion of up to 64 I/Os.

Applications

The PCA9534BS is suitable for a wide range of applications, including:

• Servers
• Personal electronics
• Industrial control
• Medical systems
• Automotive networks

Package and Quality

This I/O expander comes in a space-saving HVQFN20 package and is specified over the -40 °C to +85 °C temperature range. NXP's commitment to quality ensures that the PCA9534BS meets the stringent requirements of the most demanding applications, providing reliable performance in various environments.

With its rich feature set and ease of integration, the NXP PCA9534BS I/O expander is an excellent choice for designers looking to enhance the I/O capabilities of their systems without significant redesign or increased complexity.