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PCA9555DB

Name: PCA9555DB
Rating: 4.7 (12 reviews)

IC I/O EXPANDER I2C 16B 24SSOP

製造商
製造商。部分 #PCA9555DB
包 SSOP-24
資料表
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規格

Package	Tube
ProductStatus	Obsolete
NumberofI/O	16
Interface	I²C, SMBus
InterruptOutput	Yes
Features	POR
OutputType	Push-Pull
Current-OutputSource/Sink	10mA, 25mA
ClockFrequency	400 kHz
Voltage-Supply	2.3V ~ 5.5V
OperatingTemperature	-40°C ~ 85°C
MountingType	Surface Mount
Package/Case	24-SSOP (0.209, 5.30mm Width)

概述

Description

The PCA9555DB is a dual I2C-bus I/O port expander designed by NXP Semiconductors. It features 16 GPIO (General Purpose Input/Output) pins that can be configured as either inputs or outputs, allowing for flexible interfacing with various peripherals. The device operates on a wide voltage range (2.3V to 5.5V) and communicates with microcontrollers via the I2C bus, making it suitable for numerous applications in embedded systems.
Key features include programmable interrupt generation on input pins, a configurable polarity for input signals, and the ability to set individual GPIO pins as either input or output via registers. The PCA9555DB is particularly useful for expanding I/O capabilities in constrained environments, such as in robotics, consumer electronics, and industrial control systems. Its low power consumption and ease of integration make it a popular choice for developers looking to enhance their designs with additional I/O functionalities.

Features

The PCA9555DB is an I2C-bus I/O port expander designed for microcontroller applications. Key features include:
1. 16 GPIO Pins: It provides 16 general-purpose input/output pins that can be configured individually as inputs or outputs.
2. I2C Interface: Supports I2C communication, allowing easy integration with microcontrollers.
3. Multiple Addresses: Can support up to eight devices on the same I2C bus with selectable I2C addresses.
4. Interrupt Functionality: Features an interrupt output that signals the host when an input state changes, enhancing responsiveness.
5. Flexible Configuration: Each GPIO can be configured with internal pull-up resistors when set as an input.
6. Power Supply Range: Operates over a wide voltage range (2.3V to 5.5V), making it suitable for various applications.
7. Low Power Consumption: Designed for low power operation, which is beneficial for battery-powered devices.
These features make the PCA9555DB ideal for expanding I/O capabilities in embedded systems.

Package

The PCA9555DB is available in a TSSOP (Thin Shrink Small Outline Package) type, specifically a 20-pin TSSOP package. This compact design is suitable for space-constrained applications.

Pinout

The PCA9555DB is a 16-bit I/O expander that communicates via the I2C bus. It features a total of 20 pins, which includes:
1. Power Supply Pins:
- VCC: Power supply for the device (typically 2.3V to 5.5V).
- GND: Ground connection.
2. I2C Interface Pins:
- SDA: Serial Data Line for I2C communication.
- SCL: Serial Clock Line for I2C communication.
3. I/O Pins:
- P0 to P15: 16 GPIO pins that can be configured as inputs or outputs.
4. Configuration Pins:
- A0, A1, A2: Address selection pins, used to set the I2C address of the device.
5. Interrupt Pin:
- INT: Interrupt output pin to signal changes on the I/O pins.
The PCA9555DB can be utilized for expanding I/O capabilities in various applications, including microcontroller interfacing and peripheral control.

Manufacturer

The PCA9555DB is manufactured by NXP Semiconductors, a global semiconductor company that specializes in designing and producing a wide range of integrated circuits and microcontrollers. NXP is known for its expertise in automotive, industrial, mobile, and IoT (Internet of Things) applications. The PCA9555 is a 16-bit I/O port expander that communicates via the I2C bus, allowing for the expansion of input/output capabilities in various electronic designs. NXP Semiconductors plays a significant role in the advancement of technology across multiple sectors, focusing on innovation and sustainable solutions.

Application

The PCA9555DB is a 16-bit I/O port expander that communicates via I2C. It is commonly used in applications such as expanding GPIO for microcontrollers, interfacing with sensors, controlling LEDs, managing buttons/switches, and enhancing connectivity in embedded systems. This device is ideal for automation, robotics, and consumer electronics, where additional input/output capabilities are needed without increasing the microcontroller's pin count.

Equivalent

The PCA9555DB is a 16-bit I/O port expander with an I2C interface. Equivalent products include:
1. MCP23017 - 16-bit I/O expander with I2C.
2. PCF8575 - 16-bit I/O port expander with I2C.
3. TCA9555 - 16-bit I/O port expander with I2C.
4. MCP23008 - 8-bit version from Microchip.
These alternatives offer similar functionality but may differ in features, voltage levels, or pin configurations.