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PCA8574N,112
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PCA8574N,112

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: I/O Expander
  • Characteristics: 8-bit remote I/O expander for I2C-bus with interrupt
  • Package: SO16 (Small Outline 16-pin package)
  • Essence: The PCA8574N,112 is a versatile I/O expander that allows users to increase the number of I/O pins available on a microcontroller or other devices.
  • Packaging/Quantity: Available in reels of 2500 units

Specifications

  • Supply Voltage: 2.3V to 5.5V
  • I/O Voltage: 1.8V to 5.5V
  • Maximum Output Current: 25mA per I/O pin
  • Operating Temperature Range: -40°C to +85°C
  • Communication Interface: I2C-bus (Two-wire serial interface)

Detailed Pin Configuration

The PCA8574N,112 has a total of 16 pins, which are assigned as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | P0 | I/O Port 0 | | 2 | P1 | I/O Port 1 | | 3 | P2 | I/O Port 2 | | 4 | P3 | I/O Port 3 | | 5 | P4 | I/O Port 4 | | 6 | P5 | I/O Port 5 | | 7 | P6 | I/O Port 6 | | 8 | P7 | I/O Port 7 | | 9 | GND | Ground | | 10 | A0 | Address Bit 0| | 11 | A1 | Address Bit 1| | 12 | A2 | Address Bit 2| | 13 | SDA | I2C Data | | 14 | SCL | I2C Clock | | 15 | INT | Interrupt | | 16 | VCC | Supply Voltage|

Functional Features

  • Provides 8-bit remote I/O expansion through the I2C-bus interface.
  • Supports both input and output modes for each I/O pin.
  • Allows individual configuration of each I/O pin as either open-drain or push-pull output.
  • Supports interrupt capability to notify the microcontroller of changes on any input pin.

Advantages and Disadvantages

Advantages: - Simple and easy-to-use interface via I2C-bus. - Low power consumption. - Wide operating voltage range. - Can be cascaded with other I2C devices. - Interrupt feature reduces the need for continuous polling.

Disadvantages: - Limited number of I/O pins (8 in total). - Requires an external pull-up resistor for the I2C-bus.

Working Principles

The PCA8574N,112 operates as a slave device on the I2C-bus. It communicates with the microcontroller or master device by sending and receiving data packets over the I2C-bus interface. The microcontroller can read or write to the I/O ports of the PCA8574N,112 using the I2C protocol.

Detailed Application Field Plans

The PCA8574N,112 is widely used in various applications that require additional I/O pins, such as: - Keypad interfacing - LED matrix control - LCD display control - Sensor interfacing - Industrial automation - Home automation

Detailed and Complete Alternative Models

  • PCA8574
  • PCA8574A
  • MCP23008
  • MCP23017
  • PCF8574
  • PCF8574A

These alternative models offer similar functionality and can be used as substitutes for the PCA8574N,112 depending on specific requirements.

In conclusion, the PCA8574N,112 is a versatile I/O expander IC that provides additional I/O pins through the I2C-bus interface. It offers various features and advantages, making it suitable for a wide range of applications in different fields.

Перечислите 10 распространенных вопросов и ответов, связанных с применением PCA8574N,112 в технических решениях.

Sure! Here are 10 common questions and answers related to the application of PCA8574N,112:

  1. Q: What is PCA8574N,112? A: PCA8574N,112 is an I/O expander IC (Integrated Circuit) manufactured by NXP Semiconductors. It provides additional input/output pins for microcontrollers or other devices.

  2. Q: What is the purpose of using PCA8574N,112 in a technical solution? A: PCA8574N,112 allows you to expand the number of available I/O pins on a microcontroller, enabling you to connect more peripherals or sensors.

  3. Q: How many I/O pins does PCA8574N,112 provide? A: PCA8574N,112 provides 8 I/O pins that can be configured as either inputs or outputs.

  4. Q: How do I communicate with PCA8574N,112? A: PCA8574N,112 uses the I2C (Inter-Integrated Circuit) protocol for communication. You need to connect it to the I2C bus of your microcontroller and use appropriate libraries or code to control it.

  5. Q: Can I use multiple PCA8574N,112 ICs in my project? A: Yes, you can use multiple PCA8574N,112 ICs in your project. Each IC needs a unique I2C address set using its hardware address pins.

  6. Q: Can PCA8574N,112 handle both digital inputs and outputs? A: Yes, PCA8574N,112 can be configured as either inputs or outputs. You can set each pin individually as input or output based on your requirements.

  7. Q: What is the maximum voltage that PCA8574N,112 can handle? A: PCA8574N,112 can handle a maximum voltage of 5.5V.

  8. Q: Can I use PCA8574N,112 with both 3.3V and 5V microcontrollers? A: Yes, PCA8574N,112 is compatible with both 3.3V and 5V microcontrollers as it operates at 3.3V logic levels.

  9. Q: How do I set the I2C address of PCA8574N,112? A: PCA8574N,112 has three hardware address pins (A0, A1, and A2) that can be connected to either VCC or GND to set the I2C address. By default, all address pins are connected to GND, resulting in an address of 0x20.

  10. Q: Are there any limitations or considerations when using PCA8574N,112? A: One limitation is that PCA8574N,112 does not support interrupts. Additionally, it is important to consider the total current requirements of the connected devices, as PCA8574N,112 has a maximum current rating per pin and overall package.