NXP PCA8574AD,518 Remote 8-bit I/O Expander for I²C-bus

The NXP PCA8574AD,518 is a highly versatile I/O expander chip that provides an additional 8-bit parallel input/output expansion for the I²C-bus interface. This chip is particularly useful for applications where pins on a microcontroller are limited and there is a need to interface with keyboards, displays, or other input/output devices.

Key Features:

• I²C to Parallel Port Expander: The PCA8574AD,518 can interface directly with the I²C-bus and provide general-purpose remote I/O expansion for most microcontroller families.
• 8-bit I/O Ports: Each device has eight quasi-bidirectional data pins that can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs.
• Low Standby Current: The efficiency of the PCA8574AD,518 is exemplified by its low standby current, making it suitable for battery-driven and power-sensitive applications.
• Addressing: Built-in addressing allows the use of up to eight devices on the same bus without address conflicts, providing up to 64 additional I/O ports.
• Interrupt Output: An interrupt output is activated when any input state differs from its corresponding input port register state, which is beneficial for immediate attention in microcontroller-based systems.
• Compatibility: The device is fully compatible with 5V I²C-bus and SMBus interfaces, ensuring broad applicability in various designs and systems.
• Package: The PCA8574AD,518 comes in a convenient SO16 package, which is suitable for space-constrained applications.

Applications:

The NXP PCA8574AD,518 is ideal for a wide range of applications including, but not limited to, servers, personal computers, robotics, industrial automation, and any other systems that require additional I/O capabilities with minimal data lines. Its ease of use and integration make it a go-to solution for expanding the I/O capabilities of a microcontroller or processor with an I²C interface.

Ordering Information:

The product is available for order under the part number PCA8574AD,518, and is supplied in a reel, ensuring safe and efficient handling for high-volume manufacturing.