The NXP PCA9538ABSHP is a highly versatile, remote 8-bit I/O expander designed to enhance the input/output capabilities of an I2C-bus or SMBus. This compact component is ideal for applications where additional I/Os are necessary, and it is particularly well-suited for space-constrained environments due to its small footprint.

Key Features

• I2C-bus Interface: The device supports a fast I2C-bus interface with speeds up to 400 kHz, allowing for quick communication with microcontrollers or other I2C compatible devices.
• 8-bit I/O Ports: It provides eight programmable I/O ports that can be configured as inputs or outputs, giving the user flexibility in expanding the I/O capabilities of their system.
• Built-in Level Shifting: The PCA9538ABSHP includes level shifting functionality that enables I/O port operation at a different voltage level than the main logic, which is particularly useful for interfacing with other devices operating at various voltage levels.
• Low Standby Current: The device is optimized for low power consumption, with a very low standby current, making it an excellent choice for battery-operated and power-sensitive applications.
• Interrupt Output: An interrupt output is provided, which can be configured to reflect the status of the input ports, allowing for immediate notification of input changes without the need for constant polling by the host controller.
• High Drive Capability: The outputs can sink or source higher currents, which is beneficial for directly driving LEDs or other output devices.

Applications

The PCA9538ABSHP is suitable for a wide range of applications, including:

• Server and telecom infrastructure
• Industrial control systems
• Home automation
• Consumer electronics
• Portable devices

Package and Quality

This I/O expander is available in a lead-free, space-saving 16-pin TSSOP package, ensuring compatibility with modern surface-mount technology (SMT) manufacturing processes. NXP's commitment to quality ensures that the PCA9538ABSHP meets stringent industry standards for reliability and performance.