Introducing the NXP PCA9500PW,112 I/O Expander

The NXP PCA9500PW,112 is a sophisticated I/O expander that integrates a 2-kbit Electrically Erasable Programmable Read-Only Memory (EEPROM) with an 8-bit I/O expander to provide a versatile interface between a parallel bus and serial I2C-bus communication. It is designed to operate under a wide range of operating voltages, from 2.5 V to 5.5 V, making it suitable for a variety of applications across different voltage requirements.

This I/O expander is an ideal solution for systems that require additional I/O lines but are limited by the number of pins available on the microcontroller or processor. It is housed in a TSSOP16 package, which is known for its compact footprint, allowing for efficient use of PCB space in space-constrained designs.

Key Features:

• Integrated EEPROM: The device comes with a built-in 256-byte EEPROM, providing non-volatile storage for configuration data, device IDs, or other user-defined information that needs to persist after power cycles.
• 8-bit I/O Expander: The PCA9500PW,112 provides an additional 8 I/O lines, which can be individually set as inputs or outputs, offering flexibility to the system designer.
• I2C-bus Interface: The I2C-bus interface supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes, enabling fast data transfer and compatibility with a wide range of I2C master devices.
• Interrupt Output: An interrupt output is provided that can be configured to alert the host controller when an input state changes, enhancing system responsiveness by eliminating the need for constant polling of the I/O expander.
• Power-up with Defaults: The I/Os default to inputs at power-up, ensuring a safe startup state for systems that require specific power-up conditions.
• Low Standby Current: The PCA9500PW,112 is designed for power-sensitive applications, with a low standby current that aids in overall power management.

The PCA9500PW,112 I/O expander is a versatile component that extends the capabilities of microcontroller-based systems in a wide range of applications, such as mobile devices, industrial control systems, and consumer electronics. Its integration of EEPROM with I/O expansion capabilities, along with its user-friendly I2C interface, makes it an excellent choice for designers looking to optimize their system architecture while maintaining a low pin count and high functionality.