• PCA9539PW SOT-355
PCA9539PW SOT-355

PCA9539PW

Interface - I/O Expanders 16-Bit I2C & SMBus Lo-Pwr I/O Expander

Quantity Unit Price(USD) Ext. Price
1 $1.344 $1.34
10 $1.158 $11.58
30 $1.056 $31.68
100 $0.943 $94.30
500 $0.857 $428.50
1000 $0.836 $836.00

Inventory:6,618

*The price is for reference only.
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Overview of PCA9539PW

The PCA9539PW is an I2C-bus controlled 16-bit I/O expander for microcontroller-based systems.This device provides additional I/O ports for digital input or output expansion,allowing for enhanced connectivity and functionality in various applications.

Pinout

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

  • VCC:Positive Power Supply
  • GND:Ground
  • SCL:I2C Serial Clock Line
  • SDA:I2C Serial Data Line
  • P0-P7:General-Purpose I/O Ports

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the PCA9539PW IC for a visual representation.

Key Features

  • 16-Bit I/O Expansion:The PCA9539PW offers 16 additional I/O ports for digital input or output expansion in a microcontroller system.
  • I2C-Bus Interface:Controlled via the I2C serial interface,this device provides easy integration with microcontrollers.
  • Programmable Output Polarity:Allows for configuring the logic level polarity of the I/O ports to suit specific application requirements.
  • Low Standby Current:Features low standby current consumption for power-efficient operation in various systems.
  • Address Selection Pins:Includes address selection pins for configuring multiple devices on the same I2C bus.

Note:For detailed technical specifications,please refer to the PCA9539PW datasheet.

Application

  • I/O Expansion:Ideal for expanding the number of I/O ports in microcontroller-based projects requiring additional interfacing.
  • LED Display Control:Suitable for controlling LED displays by providing extra I/O channels for driving the display segments.
  • Sensor Interfacing:Useful for interfacing with sensors and peripheral devices that require digital input or output signals.

Functionality

The PCA9539PW serves as an efficient I/O expander for enabling flexible digital I/O capabilities in microcontroller applications.The I2C interface allows seamless communication between the microcontroller and the expander.

Usage Guide

  • Power Supply:Connect VCC (Pin) to the positive power supply and GND (Pin) to ground.
  • I2C Interface:Connect the SCL and SDA pins to the respective I2C bus lines for communication with the microcontroller.
  • I/O Configuration:Program the desired input or output configurations for the ports P0 to P7 based on the application requirements.

Frequently Asked Questions

Q:What is the maximum frequency supported by the I2C interface of the PCA9539PW?
A:The PCA9539PW supports I2C bus speeds of up to 400kHz for fast data transfer.

Q:Can the PCA9539PW be cascaded with other I2C devices?
A:Yes,the PCA9539PW can be cascaded with multiple I2C devices on the same bus by configuring unique address selections.

Equivalent

For similar functionalities, consider these alternatives to the PCA9539PW:

  • MCP23017:A popular I2C I/O expander IC offering similar features and compatibility with microcontrollers.
  • PCF8574:Another I2C-bus controlled I/O expander with 8-bit I/O ports suitable for expanding digital I/O capabilities.

PCA9539PW

Specifications

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

orderingCode 935278416118 isDistributor false
partStatusDescJA NXP no longer accepts orders for the part and will no longer manufacture the part.<br/>最終購入日 = 30 Jan 2001<br/>最終納品日 = 31 Jan 2001 LAST_BUY_DTE Jan 30, 2001
salesNum PCA9539PW/G,118 leadTime
LAST_DELIVERY_DTE Jan 31, 2001 distributorURl
partStatusDescZH NXP no longer accepts orders for the part and will no longer manufacture the part.<br/>上次购买日期 = 30 Jan 2001<br/>上次发货日期 = 31 Jan 2001 partStatusDescKO NXP no longer accepts orders for the part and will no longer manufacture the part.<br/>Last time buy date = 30 Jan 2001<br/>Last time delivery date = 31 Jan 2001
partStatusDescEN NXP no longer accepts orders for the part and will no longer manufacture the part.<br/>Last time buy date = 30 Jan 2001<br/>Last time delivery date = 31 Jan 2001 price_flg N
status No Longer Manufactured

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