PCA9534DBR

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Number of I/O:	8
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:	16-SSOP (0.209", 5.30mm Width)
Supplier Device Package:	16-SSOP
Base Part Number:	PCA9534

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Introduction

The PCA9534DBR is a low-power general-purpose I/O (GPIO) expander, which enables a microcontroller to monitor and control multiple inputs (inputs or outputs) in an efficient and power-saving manner. This I2C-bus compatible device integrates four bidirectional I/O ports and can be used in various applications.

Field of Application

The PCA9534DBR can be applied to different scenarios, beginning with home/building automation applications. It is perfect for use in scenarios where energy efficiency is a priority, or for applications that require a high level of data integrity. Moreover, this device is also useful for medical, automotive and industrial automation purposes, since it can be used to control devices at a safe distance.

Working Principle

In order to work, the PCA9534DBR requires an I2C-bus compatible microcontroller and a power source. It is then connected to the microcontroller, as a peripheral near the microcontroller\'s main processor. After its connection, the microcontroller will communicate by sending I2C commands addressed to the PCA9534DBR. These commands occur between two lines, the data line (SDA) and the clock line (SCL). The PCA9534DBR registers are used for the communication of both directions. Its output-port direction register determines whether the bits on the output port act as inputs or outputs. Its output-port data register lets the microcontroller read and write bits on the port. The PCA9534DBR works on an active-low model, and it can both detect and control external connected devices. It is capable of providing a reliable connection through pull-down resistors, which pull the inputs to low when no other device is connected.

Conclusion

In conclusion, the PCA9534DBR is a low-power general-purpose I/O (GPIO) expander that enables a microcontroller to monitor and control multiple inputs. It is suitable for home/building automation, medical, automotive and industrial automation applications, since it can be used to control devices safely and with data integrity. This device communicates with the microcontroller via two lines, the data and clock lines, and it works on an active-low model.

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