NXP USA Inc.
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PCA9518D,112
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PCA9518D,112

Product Overview

Category

PCA9518D,112 belongs to the category of I2C bus repeaters.

Use

The PCA9518D,112 is used to extend the reach of I2C bus signals in electronic systems.

Characteristics

  • Extends the I2C bus signal range
  • Supports bidirectional data transfer
  • Compatible with I2C Fast Mode (400 kHz) and Standard Mode (100 kHz)
  • Low standby current consumption
  • Provides level shifting between different voltage levels

Package

The PCA9518D,112 comes in a small outline package (SOT96-1) which is RoHS compliant.

Essence

The essence of PCA9518D,112 lies in its ability to amplify and regenerate I2C bus signals, allowing for longer distance communication between I2C devices.

Packaging/Quantity

The PCA9518D,112 is typically packaged in reels containing 2500 units per reel.

Specifications

  • Supply Voltage: 2.3 V to 5.5 V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Data Rate: 400 kHz
  • Standby Current: 10 µA (typical)

Detailed Pin Configuration

The PCA9518D,112 has a total of 8 pins:

  1. SDA_IN: Input pin for the I2C data signal.
  2. SCL_IN: Input pin for the I2C clock signal.
  3. OE: Output enable pin to control the direction of the I2C bus.
  4. GND: Ground reference pin.
  5. VCC: Power supply pin.
  6. SDA_OUT: Output pin for the amplified I2C data signal.
  7. SCL_OUT: Output pin for the amplified I2C clock signal.
  8. NC: No connection pin.

Functional Features

  • Level shifting between different voltage levels (e.g., 3.3V to 5V)
  • Bidirectional buffering of I2C bus signals
  • Automatic direction sensing and control
  • Low power consumption in standby mode

Advantages and Disadvantages

Advantages

  • Extends the reach of I2C bus signals, enabling communication over longer distances.
  • Supports both Fast Mode and Standard Mode I2C communication.
  • Low standby current consumption helps conserve power in battery-operated devices.

Disadvantages

  • Limited to I2C bus applications and may not be suitable for other communication protocols.
  • Requires additional components for proper operation, such as pull-up resistors.

Working Principles

The PCA9518D,112 acts as a bidirectional buffer for I2C bus signals. It amplifies and regenerates the incoming I2C data and clock signals, allowing them to travel longer distances without signal degradation. The device automatically senses the direction of the I2C bus and controls the output enable pin accordingly, ensuring proper bidirectional communication.

Detailed Application Field Plans

The PCA9518D,112 finds application in various scenarios where extending the range of I2C bus signals is required. Some potential application fields include:

  1. Industrial automation systems
  2. Automotive electronics
  3. Consumer electronics
  4. Medical devices
  5. Internet of Things (IoT) devices

Detailed and Complete Alternative Models

  1. PCA9517ADP,118
  2. PCA9519APW,118
  3. PCA9516APW,118
  4. PCA9515APW,118
  5. PCA9514ADP,118

These alternative models offer similar functionality to the PCA9518D,112 and can be considered as alternatives based on specific requirements and design considerations.

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Énumérez 10 questions et réponses courantes liées à l'application de PCA9518D,112 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of PCA9518D,112 in technical solutions:

1. What is PCA9518D,112? PCA9518D,112 is a level translating I2C-bus repeater that provides bidirectional voltage-level translation between low-voltage (down to 0.9V) and higher-voltage (up to 5.5V) I2C-bus or SMBus applications.

2. What is the purpose of PCA9518D,112? The purpose of PCA9518D,112 is to enable communication between devices operating at different voltage levels within an I2C-bus or SMBus system.

3. How many channels does PCA9518D,112 have? PCA9518D,112 has eight channels, allowing it to translate the voltage levels for up to eight different I2C-bus or SMBus devices.

4. What is the maximum data rate supported by PCA9518D,112? PCA9518D,112 supports a maximum data rate of 400 kHz, making it suitable for high-speed I2C-bus or SMBus applications.

5. Can PCA9518D,112 be used as a level shifter for other protocols? No, PCA9518D,112 is specifically designed for I2C-bus and SMBus applications and may not be suitable for level shifting other protocols.

6. What is the supply voltage range for PCA9518D,112? PCA9518D,112 operates with a supply voltage range from 1.65V to 5.5V.

7. Does PCA9518D,112 require external pull-up resistors? Yes, PCA9518D,112 requires external pull-up resistors on both the SDA and SCL lines.

8. Can PCA9518D,112 be used in a hot-swappable system? Yes, PCA9518D,112 supports hot-swapping, allowing devices to be added or removed from the I2C-bus without disrupting the communication.

9. What is the maximum capacitive load supported by PCA9518D,112? PCA9518D,112 can handle a maximum capacitive load of 400 pF on each channel.

10. Are there any application notes or reference designs available for PCA9518D,112? Yes, NXP provides application notes and reference designs that can help with the implementation of PCA9518D,112 in various technical solutions. These resources can be found on the NXP website or by contacting their technical support team.