PCA9555PWRG4

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I/O expanders are components that allow more input and output connections in a system. The PCA9555PWRG4 is an I/O expander with a wide range of application fields, offering the connection of up to 16 ports. This device provides an easy and cost effective way for extending the number of available I/Os in a system, enabling the integration of advanced features and functions that would not be possible otherwise.

Overview

The PCA9555PWRG4 is an I/O expander based on Texas Instruments\' PCF9555PWRG4 Power over I2C-bus port expander. This 16-bit bidirectional port expander can be programmed to either a logic high or logic low. It features high-speed, low power operation, digital I/O isolation, integrated pull-up resistors and an A-port/B-port configuration that is ideal for a wide variety of embedded applications. This IC is designed to interface with low-power, single-ended, logic and PWM signals.

Input and output capabilities

This I/O expander is capable of handling a variety of different I/O protocols and is able to support up to 16 I/O pins. The PCA9555PWRG4 is capable of both inputs and outputs when it comes to controlling, enabling the user to take advantage of both directions of control. The device also supports analog, digital, and strobe inputs, making it suitable for a wide range of applications.

Features

• 16-bit bidirectional I/O port expander
• Integrated pull-up resistors
• A-port and B-Port configuration
• Fast outputs with 35ns rise and fall times
• Low power consumption
• I2C Compatible Interface
• PWM, logic and digital signal input capability
• Isolated power supply on I2C port

Uses

The PCA9555PWRG4 is used as an I/O expander in a variety of applications from automotive to industrial controls. Automotive applications such as HVAC, infotainment, safety systems, door locks and PCM systems can benefit from the PCA9555PWRG4’s ability to control up to 16 I/O pins. In industrial control applications, the PCA9555PWRG4 can be used to control motors, valves, pumps and temperature controls.

Working Principle

The PCA9555PWRG4 operates as a stand-alone I/O controller that is connected to an I2C bus. In this way, its port pins are addressed by data that is sent over the bus. The device can be used to extend the I/O capability of an MCU or microcontroller by up to 16 bits. As the PCA9555PWRG4 supports both digital and analog inputs, it is well suited to applications with a wide range of input and output formats.

The PCA9555PWRG4 also has the ability to be configured in one of two ways: A-port or B-port. In the A port configuration, the PCA9555PWRG4 can be used as an 8-bit bidirectional port expander. In this configuration, the port pins are all outputs and data can be sent to the port pins through the I2C bus. In the B port configuration, the PCA9555PWRG4 provides up to 16 port pins with 8-bit compatibility. In this configuration, the port pins are all inputs and data can be read from the port pins through the I2C bus.

The PCA9555PWRG4 includes several features that make the device well suited for many applications. It features a low power consumption and supports a wide range of I/O pins, including logic, digital, analog and PWM. Additionally, the device can be programmed with up to three different power modes, which can be used to reduce the power consumption while enabling additional features such as a sleep mode. In addition, the integrated pull-up resistors help ensure that the device operates reliably at all times.

Conclusion

The PCA9555PWRG4 is an I/O expander that is suitable for many applications. The device is based on Texas Instruments\' PCF9555PWRG4 power over I2C-bus port expander architecture, and supports 16-bit bidirectional I/O port expansion. Its features include integrated pull-up resistors and the A-port/B-port configuration, allowing the user to take advantage of both input and output functions. Additionally, the device supports a variety of analog and digital I/O protocols, making it suitable for a broad range of applications.

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