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PCA9545AD,112
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PCA9545AD,112

Product Overview

Category

The PCA9545AD,112 is a multiplexer/demultiplexer belonging to the category of integrated circuits.

Use

It is used for I2C bus expansion and isolation in various applications.

Characteristics

  • The PCA9545AD,112 features a 4-channel I2C-bus switch with reset.
  • It has an operating voltage range of 1.65 V to 5.5 V.
  • This device supports hot insertion.

Package

The PCA9545AD,112 is available in a TSSOP24 package.

Essence

This product serves as a versatile solution for expanding and isolating I2C bus connections in electronic systems.

Packaging/Quantity

The PCA9545AD,112 is typically packaged in reels with a quantity of 2500 units per reel.

Specifications

  • Operating Voltage Range: 1.65 V to 5.5 V
  • Number of Channels: 4
  • Package Type: TSSOP24
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The detailed pin configuration for the PCA9545AD,112 is as follows: 1. SCL1: I2C-bus clock for channel 1 2. SDA1: I2C-bus data for channel 1 3. SCL2: I2C-bus clock for channel 2 4. SDA2: I2C-bus data for channel 2 5. SCL3: I2C-bus clock for channel 3 6. SDA3: I2C-bus data for channel 3 7. SCL4: I2C-bus clock for channel 4 8. SDA4: I2C-bus data for channel 4 9. GND: Ground 10. EN: Enable input 11. A0: Slave address LSB 12. A1: Slave address MSB 13. A2: Slave address MSB 14. NC: No connect 15. NC: No connect 16. VCC: Supply voltage 17. RESET: Reset input 18. SCL: I2C-bus clock 19. SDA: I2C-bus data 20. GND: Ground 21. GND: Ground 22. GND: Ground 23. GND: Ground 24. GND: Ground

Functional Features

  • Channel Selection: Allows for the selection of one of the four channels at a time.
  • Reset Function: Includes a reset input to clear the I2C-bus state machine and reset all channels to the default state.

Advantages and Disadvantages

Advantages

  • Versatile I2C-bus expansion and isolation capabilities.
  • Wide operating voltage range.
  • Hot insertion support.

Disadvantages

  • Limited to 4 channels, may not be suitable for applications requiring more channels.

Working Principles

The PCA9545AD,112 operates by providing a simple means of connecting any of the four channels to a common I2C-bus. It includes an enable input that controls the switching operation, allowing one of the four channels to be selected at a time. Additionally, the reset function ensures the I2C-bus state machine and all channels are reset to their default state when necessary.

Detailed Application Field Plans

The PCA9545AD,112 finds application in various fields including: - Industrial automation - Consumer electronics - Automotive systems - Communication equipment

Detailed and Complete Alternative Models

Some alternative models to the PCA9545AD,112 include: - PCA9546A - TCA9544A - TS5A3159

In conclusion, the PCA9545AD,112 is a versatile and reliable multiplexer/demultiplexer designed to facilitate I2C-bus expansion and isolation in a wide range of electronic applications.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät PCA9545AD,112 :n soveltamiseen teknisissä ratkaisuissa

  1. What is PCA9545AD,112?

    • PCA9545AD,112 is a 4-channel I2C-bus multiplexer with interrupt logic and an active-low reset input.

  2. How does PCA9545AD,112 work?

    • PCA9545AD,112 allows a master device to communicate with multiple slave devices on the I2C bus by selecting one of the four channels for communication at a time.

  3. What are the typical applications of PCA9545AD,112?

    • PCA9545AD,112 is commonly used in systems where multiple I2C devices need to be controlled by a single I2C master, such as in sensor hubs, industrial automation, and IoT devices.

  4. What is the maximum frequency supported by PCA9545AD,112?

    • PCA9545AD,112 supports I2C clock frequencies up to 400 kHz.

  5. How do I control the channel selection in PCA9545AD,112?

    • Channel selection is controlled through the I2C interface by writing to the control register of PCA9545AD,112.

  6. Can PCA9545AD,112 handle level shifting?

    • PCA9545AD,112 does not have built-in level shifting capabilities, so external level shifters may be required if the I2C bus operates at different voltage levels.

  7. Does PCA9545AD,112 support hot swapping of I2C devices?

    • PCA9545AD,112 does not support hot swapping, so it is recommended to ensure that the I2C bus is idle before changing the channel selection.

  8. What is the power supply voltage range for PCA9545AD,112?

    • PCA9545AD,112 operates within a power supply voltage range of 2.3V to 5.5V.

  9. Is PCA9545AD,112 compatible with standard I2C specifications?

    • Yes, PCA9545AD,112 is fully compatible with the I2C-bus standard and supports standard mode (100 kHz) and fast mode (400 kHz) I2C-bus transmission speeds.

  10. Are there any special considerations for PCB layout when using PCA9545AD,112?

    • It is important to follow the recommended layout guidelines provided in the datasheet to minimize crosstalk and ensure proper signal integrity when using PCA9545AD,112.