PCA9535D,118

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PCA9535 is an I/O expander from Texas Instruments. It is a flexible 8-bit I/O expander integrated with two 8-bit porter and a dedicated I2C-bus interface. It can be used in a wide range of applications. This article will focus on the application fields and working principle of PCA9535D,118.

1. Overview

PCA9535D,118 is a general-purpose I/O expander used to increase the I/O ports of a system. It has two 8-bit porter but only 10 of them are used. It supports operation in 2.7V to 5.5V wide power range. In addition, it is used with I2C communication interface and is compatible with various microcontrollers or digital signal controllers. Instead of a discrete solution, using PCA9535D,118 can drastically reduce required board space, power consumption, and current consumption.

2. Application fields

The PCA9535D,118 can be used in a wide range of applications such as portable electronic device control, switches, buttons, and buttons. It is used in computer peripherals, household appliances, industrial instruments and other many applications. By adding a port expansion to those devices, PCA9535D,118 provides a cost-effective solution for many applications.

3. Working principle

PCA9535D,118 uses I2C protocol to transmit and receive data. It consists of a master device and a slave device. The master device, typically a microcontroller or digital signal controller, initiates the communication. The slave device, typically the PCA9535D,118, responds to the commands sent by the master device. After the slave device receives the data, it will process it and return the processed data to the master device.

The PCA9535D,118 has two 8-bit porter. The first 8-bit porter is used to configure the way it interacts with the I2C-bus. It can also be used to control the direction of the pins by setting and resetting bits. The second 8-bit porter is configured in input mode. In this mode, the pins act as input and send the status of the pins back to the master device.

4. Conclusion

PCA9535D,118 is a flexible 8-bit I/O expander with a dedicated I2C-bus interface. It can be used in a wide range of applications such as portable electronic device control, switches, buttons, and buttons. It works by the master device sending commands and the slave device responding by processing the data and sending it back to the master device. PCA9535D,118 is wired in two 8-bit porter, one for configuration and the other for input. It provides a cost-effective solution for systems that require port expansion.

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