PCA9654EDR2G

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9654EDR2G is a versatile IC that serves as an I2C-bus controlled 16-bit I/O expander. It provides easy expansion of general-purpose I/O pins for various applications.

Characteristics: - I2C-bus compatible - 16 programmable I/O pins - Low standby current consumption - Wide operating voltage range - High noise immunity - Fast switching speed

Package: The PCA9654EDR2G is available in a small outline package (SO) with eight leads, making it suitable for space-constrained designs.

Essence: This IC acts as an interface between the microcontroller and external devices, allowing for increased flexibility and expanded I/O capabilities.

Packaging/Quantity: The PCA9654EDR2G is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Operating Voltage Range: 2.3V to 5.5V
• Maximum Output Current: 25mA per I/O pin
• I2C-bus Frequency: Up to 400kHz
• Standby Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9654EDR2G features eight input/output pins (P0-P7) and two address pins (A0, A1). The pin configuration is as follows:

┌───┐ P0 -| |- VCC P1 -| |- P7 P2 -| |- A1 P3 -| |- A0 P4 -| |- SDA P5 -| |- SCL P6 -| |- GND P7 -| |- INT └───┘

Functional Features

• I2C-bus controlled: The PCA9654EDR2G can be easily controlled and accessed through the I2C-bus interface, allowing for seamless integration with microcontrollers.
• 16 programmable I/O pins: The IC provides 16 I/O pins that can be individually configured as inputs or outputs, offering flexibility in connecting external devices.
• Interrupt output (INT): The INT pin can be used to generate an interrupt signal to the microcontroller, indicating a change in the status of the I/O pins.
• Address selection: The A0 and A1 pins allow for multiple PCA9654EDR2G devices to be connected on the same I2C-bus, enabling expansion of I/O pins.

Advantages and Disadvantages

Advantages: - Simplifies I/O expansion: The PCA9654EDR2G eliminates the need for complex wiring and reduces the number of required I/O pins on the microcontroller. - Easy integration: The I2C-bus compatibility ensures seamless communication with various microcontrollers. - Low standby current consumption: The IC consumes minimal power in standby mode, contributing to energy efficiency.

Disadvantages: - Limited output current: The maximum output current per I/O pin is 25mA, which may not be sufficient for certain high-power applications. - Dependency on I2C-bus: The functionality of the PCA9654EDR2G relies on the proper functioning of the I2C-bus, making it susceptible to bus-related issues.

Working Principles

The PCA9654EDR2G operates by receiving commands and data from the microcontroller via the I2C-bus. It interprets these commands to configure the I/O pins as either inputs or outputs. The IC continuously monitors the status of the I/O pins and provides the microcontroller with interrupt signals when a change is detected. This allows the microcontroller to respond promptly to external events.

Detailed Application Field Plans

The PCA9654EDR2G finds applications in various fields, including but not limited to: - Home automation systems - Industrial control systems - Automotive electronics - Internet of Things (IoT) devices - Robotics

In home automation systems, the PCA9654EDR2G can be used to control lighting, HVAC systems, and security devices. In industrial control systems, it enables monitoring and control of sensors, actuators, and other peripheral devices. Automotive electronics benefit from the IC's ability to expand I/O capabilities for features like central locking systems and dashboard controls. In IoT devices, the PCA9654EDR2G facilitates communication between sensors and microcontrollers. Robotics applications utilize the IC for controlling motors, sensors, and other peripherals.

Detailed and Complete Alternative Models

1. MCP23017: This IC offers similar functionality to