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PCF8574AT/3,518
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PCF8574AT/3,518

Product Overview

Category

The PCF8574AT/3,518 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used as an I/O expander for microcontrollers in various electronic applications.

Characteristics

  • The PCF8574AT/3,518 is a 16-pin IC with a built-in I2C interface.
  • It operates at a voltage range of 2.5V to 6V.
  • This IC provides 8-bit remote I/O expansion through the I2C bus.
  • It has open-drain interrupt output and can be cascaded for larger I/O requirements.

Package

The PCF8574AT/3,518 is available in a small outline package (SO) with 16 pins.

Essence

The essence of this IC lies in its ability to expand the input/output capabilities of microcontrollers using the I2C communication protocol.

Packaging/Quantity

The PCF8574AT/3,518 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Supply Voltage: 2.5V to 6V
  • Input/Output Voltage: 0V to VDD
  • Operating Temperature Range: -40°C to +85°C
  • I2C Bus Frequency: Up to 400kHz
  • Maximum Sink Current: 20mA per I/O pin

Detailed Pin Configuration

  1. A0: Address Input Bit 0
  2. A1: Address Input Bit 1
  3. A2: Address Input Bit 2
  4. GND: Ground
  5. P0: I/O Port 0
  6. P1: I/O Port 1
  7. P2: I/O Port 2
  8. P3: I/O Port 3
  9. P4: I/O Port 4
  10. P5: I/O Port 5
  11. P6: I/O Port 6
  12. P7: I/O Port 7
  13. INT: Interrupt Output
  14. SDA: I2C Serial Data
  15. SCL: I2C Serial Clock
  16. VDD: Supply Voltage

Functional Features

  • I2C interface for easy integration with microcontrollers.
  • 8-bit remote I/O expansion capability.
  • Open-drain interrupt output for efficient communication.
  • Cascadable for larger I/O requirements.

Advantages and Disadvantages

Advantages

  • Simplifies I/O expansion in microcontroller-based systems.
  • Easy to integrate with existing I2C bus systems.
  • Low power consumption.
  • Can be cascaded for increased I/O capabilities.

Disadvantages

  • Limited to 8-bit I/O expansion.
  • Requires I2C protocol implementation in the microcontroller.

Working Principles

The PCF8574AT/3,518 works by utilizing the I2C communication protocol to expand the input/output capabilities of microcontrollers. It acts as a bridge between the microcontroller and external devices, providing additional I/O ports. The I2C bus allows for bidirectional communication, enabling the microcontroller to read inputs and control outputs through the PCF8574AT/3,518.

Detailed Application Field Plans

The PCF8574AT/3,518 finds applications in various fields, including but not limited to: 1. Home automation systems 2. Industrial control systems 3. Robotics 4. Automotive electronics 5. IoT (Internet of Things) devices

Detailed and Complete Alternative Models

  1. PCF8574A: Similar to PCF8574AT/3,518 but without the extended temperature range.
  2. MCP23017: Another I/O expander IC with similar functionality and I2C interface.
  3. MAX7313: 16-bit I/O expander with an I2C interface.

These alternative models provide similar I/O expansion capabilities and can be used as substitutes for the PCF8574AT/3,518 in various applications.

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Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng PCF8574AT/3,518 sa mga teknikal na solusyon

  1. Question: What is the PCF8574AT/3,518 used for in technical solutions?
    Answer: The PCF8574AT/3,518 is commonly used as an I/O expander for microcontrollers, allowing them to control multiple input and output devices.

  2. Question: How many I/O pins does the PCF8574AT/3,518 have?
    Answer: The PCF8574AT/3,518 has 8 I/O pins that can be individually configured as inputs or outputs.

  3. Question: What is the maximum voltage the PCF8574AT/3,518 can handle?
    Answer: The PCF8574AT/3,518 can handle a maximum voltage of 5.5V.

  4. Question: Can the PCF8574AT/3,518 be used with both 3.3V and 5V microcontrollers?
    Answer: Yes, the PCF8574AT/3,518 is compatible with both 3.3V and 5V microcontrollers.

  5. Question: How do I address multiple PCF8574AT/3,518 devices on the same bus?
    Answer: Each PCF8574AT/3,518 device can be assigned a unique address using its address pins, allowing multiple devices to coexist on the same bus.

  6. Question: What is the maximum current the PCF8574AT/3,518 can sink or source per pin?
    Answer: The PCF8574AT/3,518 can sink or source up to 25mA per pin.

  7. Question: Can the PCF8574AT/3,518 be used to drive LEDs?
    Answer: Yes, the PCF8574AT/3,518 can be used to drive LEDs by configuring its pins as outputs and connecting them to the LED anodes through current-limiting resistors.

  8. Question: Is the PCF8574AT/3,518 suitable for use in automotive applications?
    Answer: Yes, the PCF8574AT/3,518 is suitable for use in automotive applications due to its robust design and wide operating voltage range.

  9. Question: Can the PCF8574AT/3,518 be used in conjunction with other I/O expanders?
    Answer: Yes, the PCF8574AT/3,518 can be used alongside other I/O expanders to increase the number of available I/O pins in a system.

  10. Question: Are there any known issues or limitations when using the PCF8574AT/3,518?
    Answer: Some users have reported issues with signal integrity and noise immunity in high-noise environments, so proper grounding and shielding practices should be followed.