PCAL9554BPWJ

Series:	Agile
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:	Open Drain, Push-Pull
Current - Output Source/Sink:	10mA, 25mA
Clock Frequency:	400kHz
Voltage - Supply:	1.65 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP
Base Part Number:	PCAL9554

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PCAL9554BPWJ Application Field and Working PrinciplePCAL9554BPWJ is a type of I/O expander, otherwise known as a parallel port expander. These kinds of expanders are used to provide additional I/O ports to an electronic device. They are used in microcontroller-based systems, such as those found in PCs and embedded systems, to provide extra functionality.I/O expanders connect to the system’s CPU via a short 11-pin male or female connector cable, and provide extra input and output signals that can be used to control components and circuits within the application. The I/O expander has a set of eight I/O pins, each of which is used for a specific function, such as light or motion sensing, or for controlling general-purpose I/O signals.The PCAL9554BPWJ is a particular type of I/O expander from Texas Instruments that is intended for connection to the I2C bus. It is used in embedded systems such as digital imaging systems, process controllers, and industrial automation. It is a 5V compliant device that is used in 5V applications and allows for increased accuracy, with very low power consumption.The PCAL9554BPWJ expander has an 8-bit input port and an 8-bit output port, which provide 8 lines of signals that can be used to control the necessary components and circuits. The device has a power supply range of 2.0V – 5.5V and a communication protocol of I2C. It has a maximum frequency of 2MHz and a minimum addressable register depth of 8 bits.The PCAL9554BPWJ I/O expander has an active low reset pin and can be used to reset the device. It also has a software configuration feature, which allows for the configuration of various parameters. The device provides a flexible way to control various I/O functions.The working principle of the PCAL9554BPWJ I/O expander is to provide an interface between the control signals from the I2C bus and the external connections, such as the 8 I/O ports. When the device receives an appropriate signal from the I2C bus, it will output a signal to the corresponding output pin. The PCAL9554BPWJ can be configured to provide either an active high or an active low output signal.The PCAL9554BPWJ is a versatile I/O expander and is used in a wide range of applications. Its 8-bit I/O ports provide a cost-effective solution for simple applications. It is also well-suited to complex applications, due to its software configuration feature. The device is popular among system designers and embedded developers, as it provides a simple and easy-to-use interface for controlling various external components.

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