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PCA9551PW

Name: PCA9551PW
Rating: 4.7 (12 reviews)

LED Lighting Driver ICs I2C LED BLINKER 8BIT

Производитель
Мфр. Часть #PCA9551PW
Пакет
Лист данных PCA9551PW DataSheet
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Спецификации

Packaging	Tube
Standard Pack Qty	2400

Обзор

Description

The PCA9551PW is a 16-bit I/O port expander designed to interface with microcontrollers via an I2C bus. It allows for the expansion of GPIO (General Purpose Input/Output) capabilities, enabling more devices or functions to be controlled without using additional pins on the microcontroller. The PCA9551PW features two 8-bit banks of configurable I/O pins that can be set as inputs or outputs, with each pin individually programmable.
Key features include interrupt capabilities for input changes, configurable pull-up resistors, and an operating voltage range from 2.3V to 5.5V, making it suitable for a variety of applications. The device supports multiple I2C addresses, allowing several PCA9551PW chips to be used on the same I2C bus, making it flexible for larger projects. Its small footprint and low power consumption are advantageous for battery-operated devices. Overall, the PCA9551PW is ideal for enhancing I/O capacity in embedded systems and control applications.

Features

The PCA9551PW is a 16-bit I/O port expander for I2C-compatible bus systems. Key features include:
1. 16 GPIO Pins: Configurable as input or output, allowing for flexible interfacing with various devices.
2. I2C Interface: Supports standard and fast-mode I2C communications, allowing easy integration with microcontrollers.
3. Interrupt Functionality: Provides an interrupt output to signal changes in input pin states, enhancing responsiveness in applications.
4. Multiple Device Support: Can connect multiple PCA9551 devices on the same I2C bus using different address configurations.
5. Configurable Polarity: Input port polarity can be inverted, which aids in designing systems based on specific requirements.
6. Low Power Consumption: Operates with low supply voltage (1.8V to 5.5V) and features a low standby current.
7. Wide Operating Temperature: Supports a temperature range from -40°C to +85°C, suitable for various environments.
Overall, the PCA9551PW is ideal for extending I/O capabilities in embedded systems.

Package

The PCA9551PW is packaged in a TSSOP (Thin Shrink Small Outline Package) with 16 pins.

Pinout

The PCA9551PW is a 16-pin I2C GPIO (General Purpose Input/Output) expander. It offers 8 GPIO pins that can be individually configured as either inputs or outputs. The pin count and their functions are as follows:
1. VDD (Pin 1): Power supply input.
2. VSS (Pin 2): Ground reference.
3. SDA (Pin 3): I2C serial data line for communication.
4. SCL (Pin 4): I2C serial clock line for communication.
5. INT (Pin 5): Interrupt output pin; indicates state changes in input pins.
6-13. GPIO0 to GPIO7 (Pins 6-13): Configurable GPIO pins for general use; can be set as inputs or outputs.
14. A0 (Pin 14): I2C address selection pin (used for setting the device's I2C address).
15. A1 (Pin 15): I2C address selection pin (used for setting the device's I2C address).
16. A2 (Pin 16): I2C address selection pin (used for setting the device's I2C address).
The PCA9551PW allows for efficient control of multiple I/O functions via I2C.

Manufacturer

The PCA9551PW is manufactured by NXP Semiconductors, a global semiconductor company known for its expertise in automotive, industrial, and Internet of Things (IoT) applications. NXP focuses on high-performance mixed-signal and digital signal processing technologies, offering a wide range of solutions including microcontrollers, processors, and connectivity products. The PCA9551PW is a 16-bit I/O port expander that interfaces with microcontrollers, enhancing GPIO capabilities in various electronic designs. NXP is recognized for its innovation and commitment to advancing technology in various sectors, including automotive safety, secure connectivity, and smart city solutions.

Application

The PCA9551PW is a GPIO expander with I2C interface, commonly used in applications such as industrial automation, consumer electronics, and automotive systems. It allows for additional input/output control for devices like sensors, displays, and controls in embedded systems. Its capabilities are beneficial in simplifying circuit designs and expanding the number of controllable peripherals in various electronic devices.

Equivalent

The PCA9551PW is a 16-bit I/O port expander with an I2C interface. Equivalent products include the MCP23016 from Microchip, the TCA9555 from Texas Instruments, and the PCF8575 from NXP. These devices offer similar functionality for expanding I/O capabilities via I2C, with variations in pin count and features. Always verify specific requirements, such as voltage levels and current ratings, when selecting a substitute.

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