NXP USA Inc.
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PCA9674ATS,112
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PCA9674ATS,112

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: GPIO Expander
  • Characteristics:
    • Low-voltage bidirectional I/Os
    • 8-bit remote I/O port for the I2C-bus
    • Open-drain interrupt output
    • Cascadable for up to 64 I/Os
  • Package: TSSOP
  • Essence: Expand the number of general-purpose input/output (GPIO) pins available in a microcontroller or other digital device.
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 1.65V to 5.5V
  • I/O Voltage Range: 1.8V to 5.5V
  • Maximum Frequency: 400 kHz
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9674ATS,112 has a total of 20 pins. The pin configuration is as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3-10 | P0-P7 | General Purpose I/O Pins | | 11 | INT | Interrupt Output | | 12 | A0 | Address Bit 0 | | 13 | A1 | Address Bit 1 | | 14 | A2 | Address Bit 2 | | 15 | VDD | Supply Voltage | | 16 | GND | Ground |

Functional Features

  • Bidirectional I/Os: Allows both input and output functionality on each pin.
  • Remote I/O Port: Provides an 8-bit I/O port that can be controlled via the I2C-bus.
  • Open-Drain Interrupt Output: Generates an interrupt signal when a change is detected on any of the input pins.
  • Cascadable: Multiple PCA9674ATS,112 devices can be cascaded to expand the number of I/Os available.

Advantages and Disadvantages

Advantages: - Allows for easy expansion of GPIO pins in microcontrollers or digital devices. - Low-voltage operation enables compatibility with a wide range of systems. - Cascadable feature provides flexibility in expanding I/Os.

Disadvantages: - Limited to 8-bit I/O port, may not be suitable for applications requiring a larger number of I/Os. - Requires I2C-bus communication protocol support in the host device.

Working Principles

The PCA9674ATS,112 operates as an I2C-bus slave device. It communicates with the host microcontroller or digital device through the I2C-bus interface. The host device sends commands and data to control the I/O pins of the PCA9674ATS,112. The bidirectional I/Os allow the device to function as both inputs and outputs. Changes on the input pins can trigger interrupts, which can be used to notify the host device of events.

Detailed Application Field Plans

The PCA9674ATS,112 can be used in various applications where additional GPIO pins are required. Some potential application fields include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics

Detailed and Complete Alternative Models

  • PCA9670ATS,112: 4-bit I/O expander with similar features but fewer I/O pins.
  • PCA9671ATS,112: 8-bit I/O expander with interrupt output and similar characteristics.
  • PCA9673ATS,112: 16-bit I/O expander with cascading capability and low-voltage operation.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af PCA9674ATS,112 i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of PCA9674ATS,112 in technical solutions:

  1. Q: What is PCA9674ATS,112? A: PCA9674ATS,112 is a 16-bit I/O expander with an I2C-bus interface, which allows for easy expansion of digital I/O ports in various applications.

  2. Q: What is the maximum voltage that PCA9674ATS,112 can handle? A: PCA9674ATS,112 can handle a maximum voltage of 5.5V.

  3. Q: How many I/O pins does PCA9674ATS,112 have? A: PCA9674ATS,112 has 16 I/O pins that can be individually configured as inputs or outputs.

  4. Q: Can PCA9674ATS,112 be used with both 3.3V and 5V microcontrollers? A: Yes, PCA9674ATS,112 is compatible with both 3.3V and 5V microcontrollers, making it versatile for different system designs.

  5. Q: How do I communicate with PCA9674ATS,112 using the I2C-bus interface? A: You can communicate with PCA9674ATS,112 by sending I2C commands to its address on the bus, allowing you to read or write data to its I/O pins.

  6. Q: Can PCA9674ATS,112 be cascaded with other I2C devices? A: Yes, PCA9674ATS,112 supports I2C-bus cascading, allowing multiple devices to be connected on the same bus.

  7. Q: What is the maximum current that PCA9674ATS,112 can source or sink per I/O pin? A: PCA9674ATS,112 can source or sink up to 25mA per I/O pin.

  8. Q: Can PCA9674ATS,112 be used in automotive applications? A: Yes, PCA9674ATS,112 is suitable for automotive applications as it operates within the automotive temperature range and has ESD protection.

  9. Q: Does PCA9674ATS,112 have any built-in interrupt functionality? A: Yes, PCA9674ATS,112 has an interrupt output pin that can be configured to indicate changes on its I/O pins, reducing the need for continuous polling.

  10. Q: Are there any evaluation boards or development kits available for PCA9674ATS,112? A: Yes, NXP provides evaluation boards and development kits that include PCA9674ATS,112, allowing you to quickly prototype and test your designs.

Please note that the specific details and features of PCA9674ATS,112 may vary, so it's always recommended to refer to the datasheet or documentation provided by the manufacturer for accurate information.