NXP USA Inc.
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PCA9545BPW,118
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PCA9545BPW,118

Product Overview

Category

The PCA9545BPW,118 belongs to the category of I2C bus switches and multiplexers.

Use

It is used for enabling a system to connect and communicate with multiple I2C buses or devices.

Characteristics

  • Allows for the connection of multiple I2C buses to a single I2C bus
  • Low Rds(on) switches for minimal signal distortion
  • Supports hot insertion
  • Low standby current consumption

Package

The PCA9545BPW,118 comes in a TSSOP-24 package.

Essence

The essence of the PCA9545BPW,118 lies in its ability to facilitate communication between multiple I2C buses and devices within a system.

Packaging/Quantity

The PCA9545BPW,118 is typically available in reels with a quantity of 2500 units per reel.

Specifications

  • Supply Voltage: 1.65V to 5.5V
  • On-state Resistance: 7 ohms (max)
  • Standby Current: 10µA (max)
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The PCA9545BPW,118 features a total of 24 pins, including SDA, SCL, and control pins for channel selection.

Functional Features

  • Channel Selection: The PCA9545BPW,118 allows for the selection of one of four channels at a time.
  • Hot Insertion: Supports hot insertion of devices without disrupting the operation of the system.
  • Low Rds(on) Switches: Minimizes signal distortion during communication.

Advantages and Disadvantages

Advantages

  • Enables efficient communication with multiple I2C devices
  • Low standby current consumption
  • Hot insertion support

Disadvantages

  • Limited to four channels
  • Requires careful consideration of bus capacitance and loading

Working Principles

The PCA9545BPW,118 operates by using its control pins to select one of the available channels, allowing the system to communicate with the corresponding I2C bus or device.

Detailed Application Field Plans

The PCA9545BPW,118 finds application in various scenarios where multiple I2C devices need to be interfaced with a microcontroller or other master device. This includes applications in industrial automation, consumer electronics, automotive systems, and more.

Detailed and Complete Alternative Models

Some alternative models to the PCA9545BPW,118 include the PCA9546A, TCA9544A, and MAX7360, each offering similar I2C bus switching and multiplexing capabilities.

In conclusion, the PCA9545BPW,118 serves as a crucial component in systems requiring the management of multiple I2C buses and devices, offering a balance of performance, flexibility, and ease of integration.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق PCA9545BPW,118 في الحلول التقنية

  1. What is PCA9545BPW,118?

    • PCA9545BPW,118 is a 4-channel I2C-bus multiplexer with interrupt logic and an active-low reset input.

  2. What is the purpose of PCA9545BPW,118 in technical solutions?

    • The PCA9545BPW,118 is used to enable multiple I2C-bus masters to communicate with multiple slave devices.

  3. How many channels does PCA9545BPW,118 have?

    • PCA9545BPW,118 has 4 channels, allowing it to connect up to 4 different I2C-bus segments.

  4. What is the voltage range supported by PCA9545BPW,118?

    • PCA9545BPW,118 supports a voltage range of 1.65V to 5.5V, making it compatible with a wide range of systems.

  5. How does PCA9545BPW,118 handle interrupts?

    • PCA9545BPW,118 has interrupt logic that allows it to signal when a new I2C-bus segment is selected.

  6. Can PCA9545BPW,118 be used for level shifting?

    • Yes, PCA9545BPW,118 can be used for level shifting as it supports bidirectional voltage translation.

  7. What is the maximum frequency supported by PCA9545BPW,118?

    • PCA9545BPW,118 supports a maximum frequency of 400kHz, suitable for most I2C-bus applications.

  8. Is PCA9545BPW,118 suitable for hot-swapping I2C-bus segments?

    • Yes, PCA9545BPW,118 supports hot-swapping, allowing for dynamic reconfiguration of I2C-bus connections.

  9. Does PCA9545BPW,118 have built-in ESD protection?

    • Yes, PCA9545BPW,118 includes ESD protection on all pins, enhancing its robustness in real-world applications.

  10. Are there any application notes or reference designs available for PCA9545BPW,118?

    • Yes, application notes and reference designs are available from the manufacturer to assist in integrating PCA9545BPW,118 into technical solutions.