PCA9554DBR

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9554DBR is a 8-bit I2C and SMBus I/O expander designed for interfacing various peripheral devices to a microcontroller. It provides additional input/output (I/O) ports, allowing the microcontroller to control more devices.

Characteristics: - 8-bit bidirectional I/O ports - I2C and SMBus compatible interface - Low standby current consumption - Wide operating voltage range - High noise immunity - ESD protection on all pins

Package: The PCA9554DBR is available in a small outline package (SOIC) with 16 pins.

Essence: The essence of PCA9554DBR lies in its ability to expand the I/O capabilities of a microcontroller, enabling it to communicate with and control multiple peripheral devices.

Packaging/Quantity: The PCA9554DBR is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• I/O Voltage Range: 0V to VDD
• Maximum Output Current: 25mA per I/O pin
• Operating Temperature Range: -40°C to +85°C
• Communication Interface: I2C and SMBus compatible
• Address Range: 7-bit slave address

Pin Configuration

The PCA9554DBR has a total of 16 pins, each serving a specific function. The detailed pin configuration is as follows:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3-10 | P0-P7 | Bidirectional I/O Ports | | 11 | A0 | Address Input Bit 0 | | 12 | A1 | Address Input Bit 1 | | 13 | A2 | Address Input Bit 2 | | 14 | GND | Ground | | 15 | VDD | Supply Voltage | | 16 | RESET | Reset Input |

Functional Features

• Expandable I/O Ports: The PCA9554DBR provides 8 additional bidirectional I/O ports, allowing the microcontroller to interface with more peripheral devices.
• I2C and SMBus Compatibility: It supports both I2C and SMBus communication protocols, ensuring compatibility with a wide range of microcontrollers.
• Low Standby Current Consumption: The device consumes minimal power in standby mode, making it suitable for low-power applications.
• High Noise Immunity: The PCA9554DBR has excellent noise immunity, ensuring reliable data transmission even in noisy environments.
• ESD Protection: All pins are equipped with electrostatic discharge (ESD) protection, safeguarding the device against damage from static electricity.

Advantages and Disadvantages

Advantages: - Easy integration with microcontrollers - Expandable I/O capabilities - Wide operating voltage range - Low power consumption - Robust protection against ESD

Disadvantages: - Limited number of I/O ports (8-bit)

Working Principles

The PCA9554DBR operates by communicating with a microcontroller through the I2C or SMBus interface. The microcontroller sends commands and data to the PCA9554DBR, which then controls the state of its I/O ports accordingly. This allows the microcontroller to read input signals from external devices or drive output signals to control them.

Application Field Plans

The PCA9554DBR finds applications in various fields where additional I/O ports are required. Some potential application areas include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics

Alternative Models

There are several alternative models available that offer similar functionality to the PCA9554DBR. Some popular alternatives include: - MCP23017 - PCF8574 - MAX7313 - TCA9539

These alternative models can be considered based on specific requirements and compatibility with the microcontroller being used.

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