The NXP PCA9501BS is a sophisticated I/O expander that offers a seamless solution for expanding I/O capabilities using the I²C-bus interface. Designed to operate with a supply voltage ranging from 2.5 to 5.5 volts, this device is perfect for interfacing with a wide array of logic levels, making it highly versatile for various applications.

Key Features

• 8-bit I/O Expander: The PCA9501BS provides an additional 8-bit parallel port, allowing users to increase their I/O capacity in microcontroller-based systems.
• I²C-bus Interface: It utilizes a two-wire serial interface, which is compatible with I²C-bus standards, enabling easy integration into existing systems with minimal wiring.
• Built-in 2 kbit EEPROM: Equipped with a non-volatile memory, the PCA9501BS includes 256 bytes of EEPROM for storing user-defined data that persists even when the power is turned off.
• Programmable Polarity: The input polarity of the I/O expander is programmable, providing flexibility for interfacing with different logic signal levels.
• Interrupt Output: An interrupt output feature alerts the host microcontroller of changes on the input pins, enhancing the efficiency of the system by reducing the need for constant polling.

Applications

The PCA9501BS is ideal for a wide range of applications, particularly where there is a need to expand the number of I/Os without changing the microcontroller. Common uses include:

• Server motherboards
• Industrial control systems
• Embedded systems
• Consumer electronics
• Automotive modules

Package and Quality

The PCA9501BS comes in a compact HVQFN24 package, ensuring a minimal footprint on PCBs and is suitable for space-constrained applications. NXP's commitment to quality means that the PCA9501BS is manufactured to meet high standards, ensuring reliability and performance for critical applications.