NXP USA Inc.
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PCAL6524HEAZ
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PCAL6524HEAZ

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: GPIO Expander
  • Characteristics:
    • Low-voltage bidirectional I/O expander
    • 24 general-purpose input/output pins
    • Supports both push-pull and open-drain output modes
    • I2C-bus interface for communication
    • Wide operating voltage range: 1.65V to 5.5V
    • Low standby current consumption
  • Package: 24-pin TSSOP package
  • Essence: PCAL6524HEAZ is a versatile GPIO expander IC that provides additional input/output pins for microcontrollers or other digital devices.
  • Packaging/Quantity: Available in reels of 2500 units.

Specifications

  • Operating Voltage Range: 1.65V to 5.5V
  • Input/Output Pins: 24
  • I2C-bus Interface: Compatible with Fast-mode, Standard-mode, and High-speed mode
  • Standby Current Consumption: 1 μA (typical)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCAL6524HEAZ IC has a total of 24 pins, each serving a specific function. The pin configuration is as follows:

  1. SDA - Serial Data Input/Output
  2. SCL - Serial Clock Input
  3. INT - Interrupt Output
  4. RESET - Reset Input
  5. VDD - Power Supply
  6. GND - Ground
  7. P00 - General Purpose I/O Pin
  8. P01 - General Purpose I/O Pin
  9. P02 - General Purpose I/O Pin
  10. P03 - General Purpose I/O Pin
  11. P04 - General Purpose I/O Pin
  12. P05 - General Purpose I/O Pin
  13. P06 - General Purpose I/O Pin
  14. P07 - General Purpose I/O Pin
  15. P10 - General Purpose I/O Pin
  16. P11 - General Purpose I/O Pin
  17. P12 - General Purpose I/O Pin
  18. P13 - General Purpose I/O Pin
  19. P14 - General Purpose I/O Pin
  20. P15 - General Purpose I/O Pin
  21. P16 - General Purpose I/O Pin
  22. P17 - General Purpose I/O Pin
  23. P20 - General Purpose I/O Pin
  24. P21 - General Purpose I/O Pin

Functional Features

  • Provides 24 additional general-purpose input/output pins for microcontrollers or digital devices.
  • Supports both push-pull and open-drain output modes, allowing flexibility in driving various loads.
  • Low standby current consumption ensures energy efficiency.
  • I2C-bus interface enables easy communication with the host device.
  • Wide operating voltage range allows compatibility with a variety of systems.

Advantages and Disadvantages

Advantages: - Provides ample additional I/O pins, expanding the capabilities of microcontrollers. - Supports multiple output modes, enhancing versatility. - Low standby current consumption helps conserve power. - Easy integration with existing systems through the I2C-bus interface. - Wide operating voltage range ensures compatibility across different platforms.

Disadvantages: - Limited to 24 I/O pins, which may not be sufficient for certain complex applications. - Requires knowledge of I2C-bus protocol for proper utilization. - May require additional circuitry for level shifting if interfacing with devices operating at different voltage levels.

Working Principles

The PCAL6524HEAZ GPIO expander operates by communicating with a host microcontroller or digital device through the I2C-bus interface. The microcontroller sends commands and data to the expander, configuring its pins as inputs or outputs and controlling their states.

The expander can be programmed to operate in either push-pull or open-drain output modes, allowing it to drive various loads such as LEDs, relays, or sensors. It also provides interrupt functionality, notifying the host device of specific events or changes on the input pins.

Detailed Application Field Plans

The PCAL6524HEAZ GPIO expander finds applications in various fields, including:

  1. Embedded Systems: Used to expand the number of I/O pins available on microcontrollers for interfacing with peripheral devices.
  2. Industrial Automation: Enables control and monitoring of multiple sensors, actuators, and switches.
  3. Consumer Electronics: Provides additional I/O pins for user interface elements like buttons, switches, and indicators.
  4. Internet of Things (IoT): Facilitates connectivity and control of IoT devices with limited I/O capabilities.
  5. Automotive Electronics: Supports expansion of I/O pins for automotive control systems and infotainment interfaces.

Alternative Models

แสดงรายการคำถามและคำตอบทั่วไป 10 ข้อที่เกี่ยวข้องกับการใช้ PCAL6524HEAZ ในโซลูชันทางเทคนิค

Sure! Here are 10 common questions and answers related to the application of PCAL6524HEAZ in technical solutions:

  1. Q: What is PCAL6524HEAZ? A: PCAL6524HEAZ is a general-purpose input/output (GPIO) expander designed for use in various technical solutions.

  2. Q: What is the purpose of PCAL6524HEAZ? A: The purpose of PCAL6524HEAZ is to provide additional GPIO pins to expand the capabilities of microcontrollers or other devices.

  3. Q: How many GPIO pins does PCAL6524HEAZ offer? A: PCAL6524HEAZ offers 24 GPIO pins that can be configured as inputs or outputs.

  4. Q: Can PCAL6524HEAZ handle both digital inputs and outputs? A: Yes, PCAL6524HEAZ can be configured to handle both digital inputs and outputs based on your application requirements.

  5. Q: What voltage levels does PCAL6524HEAZ support? A: PCAL6524HEAZ supports a wide range of voltage levels, typically from 1.65V to 5.5V.

  6. Q: Is PCAL6524HEAZ compatible with popular microcontrollers? A: Yes, PCAL6524HEAZ is compatible with various microcontrollers, including those from popular manufacturers like Arduino, Raspberry Pi, and STM32.

  7. Q: Can PCAL6524HEAZ be used in industrial applications? A: Yes, PCAL6524HEAZ is suitable for industrial applications due to its robust design and wide operating temperature range.

  8. Q: Does PCAL6524HEAZ support interrupt functionality? A: Yes, PCAL6524HEAZ supports interrupt functionality, allowing it to generate interrupts based on changes in the input pins.

  9. Q: Can PCAL6524HEAZ be cascaded with other GPIO expanders? A: Yes, multiple PCAL6524HEAZ devices can be cascaded together to further expand the number of available GPIO pins.

  10. Q: Are there any development resources available for PCAL6524HEAZ? A: Yes, the manufacturer provides datasheets, application notes, and example code to help developers integrate PCAL6524HEAZ into their technical solutions.

Please note that the answers provided here are general and may vary depending on the specific implementation and requirements of your technical solution.