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PCA9539PWR

Lo-Pwr I/O Expander

Quantity Unit Price(USD) Ext. Price
1000 $0.587 $587.00
500 $0.605 $302.50
100 $0.645 $64.50
30 $0.755 $22.65
10 $0.835 $8.35
1 $0.984 $0.98

Inventory:8,853

*The price is for reference only.
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Overview of PCA9539PWR

The PCA9539PWR is an 16-bit I2C-bus I/O expander IC designed for input and output expansion in various applications. It provides remote I/O expansion for most microcontroller families via the I2C-bus interface.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • P0-P7: I/O Ports 0-7
  • P8-P15: I/O Ports 8-15
  • VCC: Positive Power Supply
  • GND: Power Ground
  • SCL: Serial Clock Input
  • SDA: Serial Data I/O
  • INT: Interrupt Output
  • A0-A2: Device Address Select
  • RST: Reset Pin
  • PWM: Pulse Width Modulation Output


Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the PCA9539PWR IC for a visual representation.

Key Features

  • 16-Bit I/O Expansion: The PCA9539PWR offers 16 I/O ports for versatile input and output expansion.
  • I2C-Bus Interface: Enables easy interfacing with microcontrollers and other devices via the I2C-bus communication protocol.
  • Interrupt Output: Provides an interrupt output for efficient communication and signaling.
  • Address Select Pins: Allows for multiple devices to be connected on the same bus with different addresses.
  • Reset Functionality: Includes a reset pin for resetting the device to its default state.

Note: For detailed technical specifications, please refer to the PCA9539PWR datasheet.

Application

  • IoT Devices: Ideal for expanding I/O capabilities in Internet of Things (IoT) devices.
  • Automation Systems: Suitable for use in automation systems for remote I/O control.
  • Sensor Interfaces: Used in sensor interface applications to read multiple sensor inputs.

Functionality

The PCA9539PWR provides a flexible solution for I/O expansion, allowing seamless integration with microcontrollers and other devices through the I2C-bus interface. It enhances the versatility and functionality of connected systems.

Usage Guide

  • Power Supply: Connect VCC (Pin 9) to the positive power supply and GND (Pin 10) to ground.
  • I2C Interface: Connect SCL (Pin 6) to the serial clock input and SDA (Pin 5) to the serial data I/O of the microcontroller.
  • Address Selection: Use the address select pins A0-A2 to set the unique device address on the bus for communication.

Frequently Asked Questions

Q: Can multiple PCA9539PWR devices be connected to the same I2C bus?
A: Yes, multiple PCA9539PWR devices can be connected to the same I2C bus by setting unique addresses using the address select pins.

Q: Is the PCA9539PWR compatible with 5V microcontrollers?
A: The PCA9539PWR is compatible with both 3.3V and 5V microcontrollers, ensuring versatility in system design.

Equivalent

For similar functionalities, consider these alternatives to the PCA9539PWR:

  • PCA9555PWR: Another 16-bit I2C-bus I/O expander IC offering similar features and performance to the PCA9539PWR.
  • MCP23017: This I2C-based I/O expander IC provides 16 additional I/O pins and can be an alternative to the PCA9539PWR.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Number of I/Os 16 Features Configuration registers, Interrupt pin, Reset pin
Supply voltage (min) (V) 2.3 Supply voltage (max) (V) 5.5
Addresses 4 Rating Catalog
Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85

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