PCA9675PW/S911,118

PCA9675PW/S911,118 Application field and Working Principle

The PCA9675PW/S911,118 is a Microchip-developed, I2C-bus compatible, serial output port expander. It is a partof Microchip\'s diverse portfolio of I2C-bus interface solutions. It offers designers the ability to expand the I/O capabilities of any device which requires additional I/O ports. It also enables designers to build simple I/O switching networks without a microcontroller.

The PCA9675PW/S911,118 offer a total of 16 bidirectional I/O pins, each of which can be individually configured as an input or output. The two 8-bit ports can be configured in any combination of inputs and outputs and independently controlled.

It provides a wide selection of features and flexibility for system designers who require additional I/O ports. The device can be used in a wide variety of applications including, but not limited to, in peripherals such as mice, keyboards, joysticks, and printers. The PCA9675PW/S911,118 also enables easy connection of multiple I2C-bus devices with only two I2C lines, reducing connections and eliminating the need for more complex wiring. The device provides an I/O expansion via an I2C-bus compatible serial interface.

Features

• I2C-bus compatible Serial Output Port Expander
• 16 bidirectional I/O pins
• Input/Output configurable
• Bus voltage range from 1.8-5.5V)
• Integrated slave address circuit for chip identification
• Software selectable 8-bit ports
• Comprehensive interrupt control
• Integrated Pull-up Resistors and Debouncing circuitry

Working Principle

The PCA9675PW/S911,118, as with other I2C-bus compatible devices, is designed to allow for distributed control on a single, two-wire bus. The two wires of the I2C-bus carry the data (SDA) and the clock (SCL). The two wire configuration allows for multiple devices to be connected to the same bus and allows for the devices to communicate among each other effectively and efficiently.

The PCA9675PW/S911,118 utilizes 8-bit registers, allowing for 16 bits of I/O. There are two port registers, each of which can be individually configured as either an input or an output. The ports can be configured as either input or output with the register settings, and each bit can be independently configured and controlled. The PCA9675PW/S911,118 also includes interrupt control, allowing the user to configure the device to trigger interrupts based on certain criteria.

As well as providing I/O expansion, the PCA9675PW/S911,118 can also provide an alternative to a microcontroller, allowing designers to build simple I/O switching networks.

Applications

The PCA9675PW/S911,118 can be used in a variety of applications that require additional I/O ports, such as mice, keyboards, joysticks and printers. In addition, it can be used in conjunction with other I2C-bus compatible devices for a wide range of applications. The PCA9675PW/S911,118 is also ideal for applications that require multiple devices to be connected to the same bus, such as in building automation, industrial control, consumer electronics and automotive.

The PCA9675PW/S911,118 is also ideal for applications that require high speed and accuracy due to its integrated pull-up resistors, debouncing circuitry and comprehensive interrupt control. It is also an ideal solution for applications that require user-configurable solutions, as the device can be configured through software, reducing the amount of hardware required.

The PCA9675PW/S911,118 is a cost-effective, easy to use and reliable device for a wide range of applications that require additional I/O ports or distributed control on a single, two-wire bus.