Texas Instruments
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PCA9534ADW
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PCA9534ADW

Product Overview

Category

The PCA9534ADW belongs to the category of I2C-bus controlled 8-bit I/O expander for open-drain outputs.

Use

It is commonly used to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface.

Characteristics

  • 8-bit remote I/O expander for I2C-bus applications
  • Low standby current
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • Open-drain interrupt output
  • Compatible with most microcontrollers

Package

The PCA9534ADW is available in a SO16 package.

Essence

The essence of PCA9534ADW lies in its ability to provide easy and efficient I/O expansion for microcontroller-based systems.

Packaging/Quantity

The PCA9534ADW is typically packaged in reels with a quantity of 2500 units per reel.

Specifications

  • Operating Voltage: 2.3 V to 5.5 V
  • Number of I/Os: 8
  • I2C Address: 7-bit address selection using three hardware address pins

Detailed Pin Configuration

The PCA9534ADW features a total of 16 pins, including the power supply, ground, I2C interface, and I/O pins. The detailed pin configuration is as follows: 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. INT - Interrupt Output 10. SCL - Serial Clock Input 11. SDA - Serial Data I/O 12. A0 - I2C Address Input 13. A1 - I2C Address Input 14. A2 - I2C Address Input 15. GND - Ground 16. VCC - Power Supply

Functional Features

The PCA9534ADW offers the following functional features: - I2C-bus to parallel port expander - Active-low interrupt output - Polarity inversion register to configure the polarity of the input port data

Advantages and Disadvantages

Advantages

  • Simple I/O expansion solution
  • Low standby current
  • Wide operating voltage range

Disadvantages

  • Limited number of I/O ports
  • Requires an understanding of I2C-bus protocol for effective use

Working Principles

The PCA9534ADW operates by receiving commands and data from the microcontroller via the I2C-bus interface. It then processes these commands to control the I/O ports and generate interrupt signals based on the configured settings.

Detailed Application Field Plans

The PCA9534ADW finds application in various fields such as: - Industrial automation - Consumer electronics - Automotive systems - Home automation - IoT devices

Detailed and Complete Alternative Models

Some alternative models to PCA9534ADW include: - MCP23008 - PCF8574 - MAX7311

In conclusion, the PCA9534ADW serves as a versatile I/O expansion solution for microcontroller-based systems, offering a range of functional features and compatibility with various application fields.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací PCA9534ADW v technických řešeních

  1. What is PCA9534ADW?

    • PCA9534ADW is an 8-bit I2C-bus and SMBus I/O expander with interrupt output and configuration registers.

  2. What are the key features of PCA9534ADW?

    • The key features include 8-bit remote I/O pins that can be configured as inputs or outputs, a hardware address pin allowing up to 8 devices on the bus, and an active-low interrupt output.

  3. How is PCA9534ADW typically used in technical solutions?

    • PCA9534ADW is commonly used to provide additional input/output (I/O) ports for microcontrollers, allowing for expansion of the number of available I/O pins.

  4. What is the operating voltage range of PCA9534ADW?

    • PCA9534ADW operates within a voltage range of 2.3V to 5.5V.

  5. Can PCA9534ADW handle high-current applications?

    • No, PCA9534ADW is designed for low-current applications and should not be used for high-current loads.

  6. How can the I/O pins of PCA9534ADW be configured?

    • The I/O pins can be individually configured as either inputs or outputs through software control.

  7. Does PCA9534ADW support cascading multiple devices?

    • Yes, PCA9534ADW supports cascading multiple devices by setting the hardware address pins differently for each device.

  8. What is the maximum frequency supported by PCA9534ADW's I2C-bus interface?

    • The I2C-bus interface of PCA9534ADW supports a maximum frequency of 400 kHz.

  9. Can PCA9534ADW be used in automotive applications?

    • Yes, PCA9534ADW is suitable for automotive applications due to its wide operating voltage range and robust design.

  10. Are there any application notes or reference designs available for PCA9534ADW?

    • Yes, application notes and reference designs are available from the manufacturer to assist in integrating PCA9534ADW into technical solutions.