PCA9539PWG4

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9539PWG4 is a versatile 16-bit I2C-bus I/O expander designed for general-purpose input/output expansion applications. It provides remote I/O expansion for most microcontroller families via the I2C interface.

Characteristics: - 16 programmable GPIO pins - I2C-bus interface - Low standby current consumption - Schmitt-trigger action on all inputs - Noise filter on SCL/SDA inputs - Internal power-on reset - No glitch on power-up - Supports hot insertion - 5 V tolerant I/Os - ESD protection exceeds JESD 22

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The PCA9539PWG4 is an essential component for expanding the number of input/output pins available in microcontroller-based systems. It allows designers to increase the functionality and flexibility of their applications by providing additional GPIO pins.

Packaging/Quantity: The PCA9539PWG4 is typically sold in reels, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• Input Voltage Range: 0 V to VDD
• Output Voltage Range: 0 V to VDD
• Maximum Output Current: 25 mA per channel
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: 100 kHz, 400 kHz, or 1 MHz

Pin Configuration

The PCA9539PWG4 has a total of 24 pins, which are assigned as follows:

• Pins 1-8: GPIO0-GPIO7
• Pins 9-16: GPIO8-GPIO15
• Pins 17-24: SDA, SCL, INT, A0, A1, A2, RESET, VDD

Functional Features

• I2C-bus interface allows easy integration with microcontrollers
• Programmable GPIO pins provide flexibility for various applications
• Schmitt-trigger action on inputs ensures noise immunity
• Internal power-on reset eliminates the need for external reset circuitry
• Hot insertion support enables dynamic system expansion
• ESD protection safeguards against electrostatic discharge

Advantages and Disadvantages

Advantages: - Versatile and flexible I/O expansion solution - Low standby current consumption - Easy integration with microcontroller systems - Noise filter on SCL/SDA inputs improves signal integrity - Robust ESD protection

Disadvantages: - Limited to 16 GPIO pins - Requires I2C-bus communication protocol

Working Principles

The PCA9539PWG4 operates by communicating with a microcontroller via the I2C-bus interface. The microcontroller sends commands to the PCA9539PWG4 to configure the GPIO pins as either inputs or outputs. The state of each pin can be read or set by the microcontroller through the I2C-bus.

Detailed Application Field Plans

The PCA9539PWG4 finds applications in various fields, including but not limited to: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics - Consumer electronics

In industrial automation, it can be used for controlling sensors, actuators, and other peripheral devices. In home automation, it can enable the control of lighting, appliances, and security systems. In IoT devices, it can provide additional I/O capabilities for sensor nodes. In robotics and automotive electronics, it can be utilized for controlling motors, sensors, and communication interfaces. In consumer electronics, it can enhance the functionality of devices such as smart TVs and gaming consoles.

Detailed and Complete Alternative Models

• PCA9534PWG4: 8-bit I2C-bus I/O expander
• PCA9555PWG4: 16-bit I2C-bus I/O expander with interrupt output
• MCP23017-E/SP: 16-bit I2C-bus I/O expander with interrupt output
• MAX7313AUG+: 16-bit I2C-bus I/O expander with LED driver

These alternative models offer similar functionality to the PCA9539PWG4 and can be considered as alternatives based on specific requirements and design constraints.

In conclusion, the PCA9539PWG4 is a versatile I2C-bus I/O expander that provides additional GPIO pins for microcontroller-based systems. Its programmable features, low power consumption, and robustness make it suitable for various applications in different fields.