NXP USA Inc.
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PCF8574P,112
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PCF8574P,112

Product Overview

Category

The PCF8574P,112 belongs to the category of I/O expanders.

Use

It is used to increase the number of I/O ports available to a microcontroller or microprocessor.

Characteristics

  • Package: DIP/SOIC
  • Essence: I2C-bus interface
  • Packaging/Quantity: Tube/50 units per tube

Specifications

The PCF8574P,112 features: - 8-bit remote I/O port for I2C-bus - High-speed I2C-bus compatible - Low standby current - Operating supply voltage range of 2.5V to 6V - Open-drain interrupt output - Address by 3 hardware address pins for use of up to 8 devices

Detailed Pin Configuration

The pin configuration of PCF8574P,112 includes: 1. A0: Hardware address pin 2. A1: Hardware address pin 3. A2: Hardware address pin 4. P0-P7: I/O port 5. INT: Interrupt output 6. SDA: Serial data line 7. SCL: Serial clock line 8. GND: Ground 9. VCC: Supply voltage

Functional Features

The PCF8574P,112 offers the following functional features: - Expandable I/O using only two wires - Low power consumption - Noise filter on SDA/SCL inputs - Latched outputs with high current drive capability for directly driving LEDs - Compatible with most microcontrollers and microprocessors

Advantages and Disadvantages

Advantages

  • Simplifies interfacing of microcontrollers with external devices
  • Allows for easy expansion of I/O capabilities
  • Low power consumption
  • Noise filtering for reliable communication

Disadvantages

  • Limited to 8-bit I/O expansion
  • Requires understanding of I2C-bus protocol for effective usage

Working Principles

The PCF8574P,112 operates by communicating with the microcontroller or microprocessor through the I2C-bus interface. It receives commands from the controller and controls the I/O ports accordingly.

Detailed Application Field Plans

The PCF8574P,112 finds applications in various fields such as: - Industrial automation - Home automation - Robotics - IoT devices - Sensor interfacing

Detailed and Complete Alternative Models

Some alternative models to PCF8574P,112 include: - MCP23008 - MCP23S08 - MAX7311 - SX1509

In conclusion, the PCF8574P,112 is a versatile I/O expander that provides a cost-effective solution for expanding the I/O capabilities of microcontrollers and microprocessors. Its compatibility with the I2C-bus interface and low power consumption make it suitable for a wide range of applications.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق PCF8574P,112 في الحلول التقنية

  1. What is PCF8574P,112?

    • The PCF8574P,112 is an I/O expander that provides additional input/output pins for microcontrollers through the I2C communication protocol.

  2. How many I/O pins does PCF8574P,112 have?

    • The PCF8574P,112 has 8 I/O pins that can be used as either inputs or outputs.

  3. What is the maximum voltage supported by PCF8574P,112?

    • The PCF8574P,112 supports a maximum voltage of 5V.

  4. Can PCF8574P,112 be used with Arduino?

    • Yes, PCF8574P,112 can be easily interfaced with Arduino using the Wire library for I2C communication.

  5. How to address multiple PCF8574P,112 devices on the same I2C bus?

    • Each PCF8574P,112 device can be assigned a unique address using its A0, A1, and A2 pins, allowing multiple devices to coexist on the same I2C bus.

  6. What are some common applications of PCF8574P,112?

    • PCF8574P,112 is commonly used for expanding the I/O capabilities of microcontrollers in applications such as keypad interfacing, LED control, and driving relays.

  7. How to interface PCF8574P,112 with a microcontroller?

    • PCF8574P,112 can be interfaced with a microcontroller using the I2C protocol, where the microcontroller acts as the master and the PCF8574P,112 as the slave device.

  8. What are the typical operating conditions for PCF8574P,112?

    • The typical operating voltage range for PCF8574P,112 is 2.5V to 6V, and it operates within a temperature range of -40°C to 85°C.

  9. Can PCF8574P,112 sink or source current from its I/O pins?

    • PCF8574P,112 can both sink and source current up to 25mA per pin, making it suitable for driving LEDs and other low-power peripherals.

  10. Are there any limitations to the speed of I2C communication with PCF8574P,112?

    • The maximum I2C clock frequency supported by PCF8574P,112 is 400kHz, which should be considered when designing real-time applications.