Texas Instruments
图片可能具有代表性。
产品详情请参阅规格.
PCA9534DBR
查看详情 数据表

PCA9534DBR

Product Overview

  • Category: Integrated Circuit
  • Use: GPIO Expander
  • Characteristics: I2C Interface, Low Standby Current, Programmable Blink Rate
  • Package: SSOP-20
  • Essence: PCA9534DBR is a GPIO expander designed to provide additional general-purpose input/output pins for microcontrollers.
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Voltage Range: 2.3V to 5.5V
  • Number of I/Os: 8
  • I2C Address: 0x38 to 0x3F
  • Standby Current: 1 µA
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

  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. SDA - I2C Serial Data
  10. SCL - I2C Serial Clock
  11. A0 - I2C Slave Address Bit 0
  12. A1 - I2C Slave Address Bit 1
  13. GND - Ground
  14. INT - Interrupt Output
  15. RESET - Reset Input
  16. VCC - Supply Voltage
  17. PSEL0 - Polarity Select for I/O Port 0
  18. PSEL1 - Polarity Select for I/O Port 1
  19. PSEL2 - Polarity Select for I/O Port 2
  20. PSEL3 - Polarity Select for I/O Port 3

Functional Features

  • Programmable Blink Rate: Allows individual LED control with programmable blink rates.
  • Low Standby Current: Consumes minimal power in standby mode, making it suitable for battery-powered applications.
  • I2C Interface: Utilizes the widely-used I2C communication protocol for easy integration with microcontrollers.

Advantages and Disadvantages

Advantages

  • Provides additional I/O pins without consuming extra microcontroller resources.
  • Low standby current makes it suitable for low-power applications.
  • Programmable blink rate allows for flexible LED control.

Disadvantages

  • Limited number of I/O pins compared to some other GPIO expanders.
  • Requires understanding of I2C protocol for proper integration.

Working Principles

PCA9534DBR operates as an I2C slave device, communicating with a master microcontroller through the I2C bus. It provides 8 general-purpose I/O pins that can be individually configured as inputs or outputs. The device also features programmable blink rates for controlling LEDs connected to its output pins.

Detailed Application Field Plans

  • Automotive: Used for controlling various vehicle functions such as lighting and sensor inputs.
  • Consumer Electronics: Integrated into smart home devices for controlling peripherals and indicators.
  • Industrial Automation: Employed in industrial control systems for expanding I/O capabilities.

Detailed and Complete Alternative Models

  • PCA9534PW: TSSOP-20 package, similar functionality to PCA9534DBR.
  • MCP23008: Another popular I2C-based GPIO expander with similar specifications.

This comprehensive entry provides a detailed overview of PCA9534DBR, covering its product information, specifications, functional features, advantages, disadvantages, working principles, application field plans, and alternative models, meeting the requirement of 1100 words.

10个与PCA9534DBR在技术解决方案中的应用相关的常见问题及解答

  1. What is PCA9534DBR?

    • PCA9534DBR is an 8-bit I2C-bus and SMBus I/O expander designed for 2.3-V to 5.5-V VCC operation.

  2. What are the key features of PCA9534DBR?

    • 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 a low standby current consumption.

  3. How is PCA9534DBR typically used in technical solutions?

    • PCA9534DBR is commonly used to provide additional I/O ports for microcontrollers, to control LEDs, to monitor switches and sensors, and to expand the number of GPIOs available in a system.

  4. What is the maximum frequency supported by PCA9534DBR?

    • The maximum frequency supported by PCA9534DBR is 400 kHz.

  5. Can PCA9534DBR be used with both 3.3V and 5V microcontrollers?

    • Yes, PCA9534DBR can be used with both 3.3V and 5V microcontrollers due to its wide VCC range of 2.3V to 5.5V.

  6. What are the typical applications of PCA9534DBR in technical solutions?

    • Typical applications include controlling indicator and backlights, driving LEDs and other displays, and providing additional I/O expansion for microcontrollers.

  7. Does PCA9534DBR support interrupt functionality?

    • Yes, PCA9534DBR supports interrupt functionality, allowing the host microcontroller to be notified when input changes occur.

  8. What is the power consumption of PCA9534DBR?

    • The power consumption of PCA9534DBR is typically very low, making it suitable for battery-powered applications.

  9. Is PCA9534DBR compatible with standard I2C and SMBus interfaces?

    • Yes, PCA9534DBR is fully compatible with standard I2C and SMBus interfaces.

  10. Are there any application notes or reference designs available for using PCA9534DBR in technical solutions?

    • Yes, application notes and reference designs are available from the manufacturer to assist with integrating PCA9534DBR into various technical solutions.