PCF8574DWRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Number of I/O:	8
Interface:	I²C
Interrupt Output:	Yes
Features:	POR
Output Type:	Push-Pull
Current - Output Source/Sink:	1mA, 25mA
Clock Frequency:	100kHz
Voltage - Supply:	2.5 V ~ 6 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	PCF8574

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Introduction

The PCF8574DWRG4 is a type of I/O expander that is designed for enhanced integration of interface and I/O functions. This type of device offers a wide range of capabilities and provides a cost-effective solution for applications requiring I/O expansion. In this article we will discuss the application fields and working principles of the PCF8574DWRG4.

Application Field

The PCF8574DWRG4 I/O expander is ideal for applications that require enhanced integration of interface and I/O functions. This type of I/O expander is well-suited to applications where data needs to be transferred between two components, such as a microcontroller and an Application Specific Integrated Circuit (ASIC). The PCF8574DWRG4 is also highly suitable for applications where increased I/O flexibility is desired, such as storage, communications, industrial control, automation, and network systems.

Features

The PCF8574DWRG4 offers a wide range of features which make it highly suitable for a variety of applications. It has an 8-bit wide data bus and a 2-wire Interface (I2C) communication interface. Additionally, the device has eight Configurable Output Drive strengths with three input/output modes. The device is designed to operate over an extended temperature range, from -40°C to +85°C. Other features offered by the PCF8574DWRG4 include a 20 MHz I2C Bus Speed, 1.6 µA Low-Power Shutdown Mode, 4.3 V to 5.5 V Operational Voltage Range, and External Clock Synchronization.

Working Principle

The PCF8574DWRG4 uses an external clock to synchronize communication between a host controller and the device. The host controller initiates a data transfer by issuing a START signal to the device. A slave address is then sent from the host controller to the device, specifying which device the host controller wants to communicate with. The slave address is followed by a data acknowledge (ACK) signal, which is sent from the device to the host controller. The data packet is then transferred from the host controller to the device, followed by an ACK signal from the device. The last part of the data transfer process is done via a STOP signal from the host controller, which signals the end of the data transfer process.

Conclusion

The PCF8574DWRG4 I/O expander is an ideal solution for a wide range of applications which require enhanced integration of interface and I/O functions. This type of expander offers a wide range of features, including a 20 MHz I2C Bus Speed, 1.6 µA Low-Power Shutdown Mode, 4.3 V to 5.5 V Operational Voltage Range, and External Clock Synchronization. The PCF8574DWRG4 also uses an external clock to synchronize communication between a host controller and the device. It is a cost-effective solution for applications requiring enhanced I/O flexibility.

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