PCA9509DP,118

The PCA9509DP,118 is an I2C-bus controlled octal I/O expander with interrupt and reset manufactured by Nexperia. This integrated circuit is designed to expand the number of I/O ports available to a microcontroller or other embedded system through the I2C (Inter-Integrated Circuit) serial communication protocol. It provides additional digital I/O (Input/Output) pins, which can be controlled and monitored by the host system via the I2C interface.

Key Features:

• Octal I/O Expander: Provides eight additional bidirectional I/O ports, allowing the expansion of the digital I/O capability of the host system.

• I2C-Bus Interface: Features an I2C-bus serial interface, enabling communication with the host microcontroller or system controller using only two wires (SDA and SCL).

• Programmable Output Configuration: Each I/O port can be individually configured as input or output through software control, offering flexibility in interfacing with external devices and sensors.

• Interrupt Output: Includes an interrupt output pin that can be configured to signal the host microcontroller when certain predefined conditions are met, reducing the need for continuous polling of input states.

• Active-Low Reset Input: Provides an active-low reset input pin that can be used to reset the device and restore it to its default configuration.

• Low Standby Current: Consumes low standby current when not actively transmitting or receiving data, minimizing power consumption and extending battery life in portable applications.

• 5V Tolerant Inputs: Features 5V tolerant inputs, allowing direct interfacing with devices operating at higher voltage levels without the need for level shifting.

• Wide Operating Voltage Range: Supports a wide operating voltage range, making it compatible with a variety of microcontrollers and system voltage levels.

Applications:

• Embedded Systems: Used in embedded systems and microcontroller-based projects to expand the number of available digital I/O pins for interfacing with peripherals, sensors, and external devices.

• Automotive Electronics: Integrated into automotive electronics systems for controlling and monitoring various functions such as lighting, sensors, switches, and actuators.

• Industrial Automation: Deployed in industrial automation applications for interfacing with sensors, switches, relays, and actuators in control panels and PLC (Programmable Logic Controller) systems.

• Consumer Electronics: Utilized in consumer electronics products such as smart home devices, IoT (Internet of Things) gadgets, and appliances for adding additional I/O ports for user interface and control.

• Test and Measurement Equipment: Integrated into test and measurement equipment for expanding the number of I/O channels available for data acquisition, signal conditioning, and control.

• Networking Equipment: Used in networking equipment such as routers, switches, and access points for controlling and monitoring external devices, status indicators, and system functions.

• Medical Devices: Deployed in medical devices and equipment for interfacing with sensors, actuators, displays, and user interface components, enabling flexible system configuration and control.

• Security Systems: Integrated into security systems, access control panels, and surveillance equipment for interfacing with sensors, alarms, keypads, and other security peripherals.