PCA9535DWR

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Number of I/O:	16
Interface:	I²C, SMBus
Interrupt Output:	Yes
Features:	POR
Output Type:	Push-Pull
Current - Output Source/Sink:	10mA, 25mA
Clock Frequency:	400kHz
Voltage - Supply:	2.3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	24-SOIC
Base Part Number:	PCA9535

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Introduction

The PCA9535DWR is an I/O expander device that is used to expand the capabilities of microcontrollers and to provide an industry-standard I2C interface. This device provides 8 general-purpose input/output (GPIO) pins and operates as an I/O expander when connected to any microcontroller that implements the I2C protocol. It is a highly integrated, low cost solution that provides an easy way to expand the number of I/O pins available on a microcontroller.

Application Field

The PCA9535DWR can be used in a wide variety of applications. It can be used for increasing the number of available I/O pins on a microcontroller, for controlling slow peripheral devices, for providing additional digital connectivity for industrial and consumer applications, for devices requiring low power consumption, and also for port and register expansion.One specific application of the PCA9535DWR is in embedded systems. Embedded systems typically require increasing amounts of digital I/O capability and the PCA9535DWR provides the necessary I/O pins to meet these demands. It is an ideal solution for expanding the number of available I/O pins on an embedded system because it requires minimal extra components, provides high-quality I/O signals, and is easy to program and configure.The PCA9535DWR is also used for additional applications, such as home automation. Home automation systems require more and more digital I/O pins due to the increasing complexity of the tasks they must perform. The PCA9535DWR is an ideal solution for expanding the number of available I/O pins on a home automation system as it provides a high-quality I/O signal and is easy to program and configure.

Working Principle

The PCA9535DWR works using the I2C protocol. I2C is a synchronous serial communication protocol that is used to interface different devices or components with each other. The I2C protocol is a two-wire serial communications bus, consisting of a data line (SDA) and a clock line (SCL). The SDA line carries the data transferred between devices, while the SCL provides a reference clock signal used to synchronize data transfer within the two devices.The PCA9535DWR is capable of being wired as either a master or a slave device. When it is wired as a master, it acts as the bus master by generating the clock signal and initiating the data transfer. When it is wired as a slave, the PCA9535DWR willMonitor the SCL line for the clock signal and only drive the SDA line when needed with data that is coming from it.The PCA9535DWR supports 8 GPIO pins, each of which is configured as either an input or an output by setting a single bit in the configuration register. Once configured, the status of the GPIO pins can be read or written by reading or writing to the data register, respectively.

Conclusion

The PCA9535DWR is a versatile and low cost I/O expander device that can be used to expand the number of available I/O pins on a wide variety of systems. It is particularly useful for increasing the number of available I/O pins on embedded systems or home automation systems. It operates using the I2C protocol, allowing it to easily integrate with other devices that also use the I2C protocol. It is also highly configurable and easy to program and configure.

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