PCA9538D,112

Series:	--
Packaging:	Tube
Part Status:	Obsolete
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-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	16-SO
Base Part Number:	PCA9538

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PCA9538D, 112 Application Field and Working Principle

The PCA9538D, 112 is an interface I/O expanders specifically designed to increase the number of input-output lines (I/Os) from a single host processor. This expanders tackle the challenge of connecting and connecting digital ports, GPIOs, dedicated ADCs, and any kind of sensors for incrementing the digital port connectivity of the system or board. The PCA9538D, 112 is designed to manage up to 16 I/O’s with an eight-bit I²C-bus I/O expander, thereby playing an important role in monitoring and controlling peripheral input-outputs in any system where expandability is a prior requirement.

Brief Overview on PCA9538D, 112

The PCA9538D, 112 is a 3.3V 8-bit bidirectional voltage-level translator for use in I²C-bus and SMBus applications. The pins of the PCA9538D, 112 are designed to be in the low power-consumption CMOS technology, thus making it capable of driving loads of up to 1.25mA each. It has a maximum rated clock frequency of 2.7 MHz in both the SCL and SDA pins and a static current of 0.1 µA in all ports. An extended ambient temperature range of -40°C to +85°C is made available on the PCA9538D, 112.

Features and Benefits of PCA9538D, 112

The PCA9538D, 112 offers a range of features and benefits as few of them are given below:• The PCA9538D, 112 provides an 8-bit I²C-bus I/O port expander and enables up to 16 input-output lines from a single host processor.• It is integrated with pulse-width-modulators (PWM), track/hold and power-on-resetto provide efficient power management and flexible system control.• The PCA9538D, 112 is an easy-to-use communications control module suitable for industrial and automotive applications.• It is a low power-consumption CMOS-compatible component with maximum rated clock frequency of 2.7 MHz suitable for rapid data transfer.

Working Principle of PCA9538D, 112

The PCA9538D, 112 works according to the I²C-bus protocol principles. It operates as a slave device on the I²C-bus and transmits data to a master device. The PCA9538D, 112 has read and write functions that can be initiated by the master. Data can be written to the PCA9538D, 112 either to the input or output port, or to the four configuration registers. Bits written to the output port are used to directly set the outputs of the PCA9538D, 112. In order to send data to the PCA9538D, 112, the master must first transmit a start condition, followed by the device address and a write bit. The master then transmits the command host processor wants to execute. After the command is received by the PCA9538D, 112, the master transmits data then the master transmits a stop condition to complete the transmission. The master can initiate a read transaction by first transmitting a start condition and the device address followed by a write bit. The PCA9538D, 112 responds to the read request with an acknowledge bit. The master then transmits the data to the PCA9538D, 112 and a stop condition.

Applications of PCA9538D, 112

The PCA9538D, 112 is an interface I/O expanders can be used in a variety of applications including:• It is used to control peripheral input-outputs in automotive, industrial and commercial systems.• It is compatible with different micro-controllers and has the capability to directly connect to the I²C-bus.• It is used in motor drivers to make complex switching systems• It is used for transferring data between two systems• It is also used for Audio/Video applications like display and amplifier control• It is used in motion sensing applications.• It is used for implementing door locks, capturing images, controlling lights and so on.

Conclusion

The PCA9538D, 112 is an interface I/O expanders designed to increase the number of input-output lines (I/Os) from a single host processor. Its extended ambient temperature range, low power-consumption CMOS technology and 2.7 MHz maximum rated clock frequency makes it suitable for rapid data transfer. The PCA9538D, 112 is a cost-effective solution for implementing door locks, capturing images, controlling lights, transferring data between two systems, motor control, and Audio/Video applications. This expanders tackle the challenges of connecting I/Os, GPIOs, dedicated ADCs, and any kind of sensors for incrementing the digital port connectivity of the system/board.

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