PCA9539RGER

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9539RGER is a versatile 16-bit I2C-bus I/O expander designed for general-purpose input/output expansion in various electronic applications. It provides an easy and efficient way to increase the number of I/O ports available on a microcontroller or other digital devices.

Characteristics: - 16 programmable I/O pins - I2C-bus interface for communication with the host device - Low standby current consumption - Wide operating voltage range (2.3V to 5.5V) - Schmitt-trigger action on all inputs for noise suppression - Open-drain interrupt output pin - Internal power-on reset - ESD protection exceeds 2000V HBM per JESD22-A114, 200V MM per JESD22-A115, and 1000V CDM per JESD22-C101

Package: The PCA9539RGER comes in a 24-pin VQFN package, which stands for Very Thin Quad Flat No-Lead. This package offers a compact size and excellent thermal performance.

Essence: The essence of PCA9539RGER lies in its ability to expand the number of I/O ports available on a microcontroller or digital device through the I2C-bus interface.

Packaging/Quantity: The PCA9539RGER is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Input/Output Voltage Range: GND to VDD
• Maximum Output Current: 25mA per I/O pin
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400kHz

Pin Configuration

The PCA9539RGER has a total of 24 pins, which are assigned specific functions as follows:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | SDA | I2C-bus Serial Data Input/Output | | 2 | SCL | I2C-bus Serial Clock Input | | 3-18 | P0-P15 | Programmable I/O Pins | | 19 | INT | Interrupt Output | | 20 | A0 | Address Input Bit 0 | | 21 | A1 | Address Input Bit 1 | | 22 | A2 | Address Input Bit 2 | | 23 | GND | Ground | | 24 | VDD | Supply Voltage |

Functional Features

• I2C-bus Interface: The PCA9539RGER utilizes the I2C-bus interface for communication with the host device. This allows for easy integration into existing systems and enables control of the I/O pins through simple commands.

• Programmable I/O Pins: The 16 I/O pins (P0-P15) can be individually configured as inputs or outputs. This flexibility allows for customization based on specific application requirements.

• Interrupt Output: The INT pin serves as an open-drain interrupt output, providing a signal to the host device when a change in input state is detected. This feature is useful for applications requiring real-time event notification.

• Schmitt-trigger Action: All input pins incorporate Schmitt-trigger action, which helps suppress noise and improve signal integrity by providing hysteresis.

Advantages and Disadvantages

Advantages: - Easy and efficient way to expand I/O ports - Low standby current consumption - Wide operating voltage range - Schmitt-trigger action for noise suppression - Compact VQFN package

Disadvantages: - Limited to 16 I/O pins, may not be suitable for applications requiring a higher number of ports - Requires I2C-bus interface support from the host device

Working Principles

The PCA9539RGER operates by receiving commands and data through the I2C-bus interface. The host device communicates with the IC by sending specific instructions to set the desired configuration of the I/O pins (input or output) and control their states.

When configured as inputs, the IC can detect changes in the input state and generate an interrupt signal on the INT pin. This allows the host device to respond promptly to events occurring on the external circuitry connected to the PCA9539RGER.

Detailed Application Field Plans

The PCA9539RGER finds applications in various fields where additional I/O ports are required. Some potential application areas include:

1. Industrial Automation: Used for controlling sensors, actuators, and other peripheral devices in industrial automation systems.
2. Home Automation: Enables expansion of I/O ports in smart