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PCA9554D

Name: PCA9554D
Rating: 4.7 (12 reviews)

8-BIT I2C-BUS AND SMBUS I/O PORT

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製造商。部分 #PCA9554D
包 SO-16
資料表 PCA9554D DataSheet
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ProductStatus	Active

概述

Description

The PCA9554D is an I²C-bus I/O port expander that features 16 GPIO pins. Designed by NXP Semiconductors, it expands the I/O capabilities of microcontrollers, making it suitable for applications requiring additional digital inputs and outputs. The device can be configured as either an input or output for each pin, allowing for flexible interfacing with various peripherals.
Key features include a 2-wire I²C interface for communication, the ability to connect multiple devices on the same bus by assigning unique addresses, and interrupt capability that notifies the host of changes in input states. The PCA9554D supports a wide voltage range, making it compatible with different systems.
It is commonly used in applications such as LED control, keypad interfaces, and sensor monitoring, where additional I/O is necessary without increasing the complexity of the microcontroller. The PCA9554D simplifies circuit design by reducing the number of required pins on the microcontroller while enhancing overall functionality.

Features

The PCA9554D is an I²C bus I/O port expander designed to provide additional digital GPIO pins to microcontrollers. Key features include:
1. 16 GPIO Ports: Configurable as input or output, allowing for flexible interfacing with various devices.
2. I²C Interface: Supports 1 to 2 MHz fast-mode I²C communication, facilitating easy integration with microcontrollers.
3. Interrupt Capability: Provides an interrupt output (INT) for detecting changes in input states, enhancing responsiveness.
4. Multiple Address Options: Supports up to 8 devices on a single I²C bus through configurable address pins.
5. Power Management: Operates from 2.3V to 5.5V, making it suitable for battery-powered applications.
6. Internal Pull-Up Resistors: Integrated pull-ups for input pins simplify interfacing with external switches and sensors.
7. Low Power Consumption: Designed for efficient power usage, essential for portable applications.
Overall, the PCA9554D is an effective solution for expanding GPIO capabilities in embedded systems.

Package

The PCA9554D is typically available in a TSSOP (Thin Shrink Small Outline Package) or a MSOP (Microminiature Small Outline Package) configuration, which are compact surface-mount packages suitable for space-constrained applications.

Pinout

The PCA9554D is a 16-pin I2C I/O expander. It features the following key functions:
1. Pin Count: 16 pins.
2. Functionality: It provides 8 GPIO (General Purpose Input/Output) pins that can be configured as either inputs or outputs.
3. I2C Interface: It communicates with microcontrollers over the I2C bus, allowing for easy integration in multi-device systems.
4. Interrupt Output: It includes an interrupt pin to signal the host when there are changes in the input states.
5. Configurable Pull-ups: The device supports internal pull-up resistors for input pins.
6. Addressing: The I2C address can be set via two address pins, enabling multiple PCA9554D devices on the same bus.
Overall, the PCA9554D expands the number of available I/O pins for microcontrollers, making it a versatile component for various applications.

Manufacturer

The PCA9554D is manufactured by NXP Semiconductors, a global semiconductor company. NXP specializes in designing and manufacturing a wide range of integrated circuits and semiconductor solutions, including microcontrollers, processors, RF solutions, and interface devices. It serves various industries such as automotive, industrial, IoT, and consumer electronics. NXP is known for its focus on innovation, particularly in areas like secure connectivity and smart solutions. The PCA9554D itself is an I2C-bus I/O port expander, allowing additional GPIO capabilities for microcontrollers, enhancing flexibility in circuit designs.

Application

The PCA9554D is a 16-bit I/O port expander used in various applications, including industrial automation, consumer electronics, and automotive systems. It interfaces with microcontrollers via I2C, facilitating additional GPIOs for controlling LEDs, buttons, and sensors. Its low-power design makes it suitable for battery-operated devices, while its ability to manage multiple input/output operations enhances flexibility in complex systems. Additionally, it is utilized in smart home devices and IoT applications for improved connectivity and control.

Equivalent

Equivalent products to the PCA9554D chip include the PCF8574, MCP23017, and TCA9555. These chips also serve as I²C I/O expanders, providing similar functionality for extending GPIO pins in microcontroller applications. Always check the specific pin configuration and voltage requirements for compatibility.