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TCA4311DR
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TCA4311DR

Product Overview

Category

TCA4311DR belongs to the category of digital bus switches.

Use

It is primarily used for level shifting and buffering in I2C bus applications.

Characteristics

  • TCA4311DR is a bidirectional translating switch that supports both high-speed mode (up to 400 kHz) and standard mode (up to 100 kHz) I2C-bus transmission.
  • It provides voltage level translation between low-voltage (down to 0.9 V) and higher-voltage (up to 5.5 V) I2C buses.
  • The device features a configurable open-drain output, which allows it to be connected to an I2C bus with a different voltage level.
  • TCA4311DR has built-in glitch filtering to suppress noise spikes on the bus lines.

Package

TCA4311DR is available in a small 8-pin SOIC package.

Essence

The essence of TCA4311DR lies in its ability to facilitate communication between I2C devices operating at different voltage levels.

Packaging/Quantity

TCA4311DR is typically sold in reels or tubes, with each reel/tube containing a specified quantity of devices.

Specifications

  • Supply Voltage: 1.65 V to 5.5 V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Data Rate: 400 kHz
  • Maximum Capacitive Load: 400 pF
  • On-State Resistance: 3 Ω (typical)

Detailed Pin Configuration

TCA4311DR features the following pin configuration:

  1. SDA_IN: Input/output for the lower-voltage I2C bus.
  2. SCL_IN: Input for the lower-voltage I2C bus clock.
  3. OE: Output enable input. When low, the device is enabled.
  4. SDA_OUT: Output for the higher-voltage I2C bus.
  5. SCL_OUT: Output for the higher-voltage I2C bus clock.
  6. VCC_A: Supply voltage for the lower-voltage side.
  7. GND: Ground reference.
  8. VCC_B: Supply voltage for the higher-voltage side.

Functional Features

  • Bidirectional voltage level translation between low-voltage and higher-voltage I2C buses.
  • Configurable open-drain output for compatibility with different voltage levels.
  • Glitch filtering to suppress noise spikes on the bus lines.
  • Supports high-speed mode (up to 400 kHz) and standard mode (up to 100 kHz) I2C-bus transmission.

Advantages and Disadvantages

Advantages

  • Enables communication between I2C devices operating at different voltage levels.
  • Supports high-speed and standard mode I2C-bus transmission.
  • Provides glitch filtering to enhance signal integrity.

Disadvantages

  • Limited to I2C bus applications and may not be suitable for other bus protocols.
  • Requires careful consideration of voltage level compatibility to avoid potential issues.

Working Principles

TCA4311DR works by monitoring the voltage levels of the I2C bus lines and translating them accordingly. It detects the logic levels of the lower-voltage I2C bus and converts them to the appropriate levels for the higher-voltage I2C bus, and vice versa. The device also incorporates glitch filtering to eliminate noise spikes that could disrupt communication.

Detailed Application Field Plans

TCA4311DR finds application in various scenarios where voltage level translation is required in I2C bus communication. Some specific application fields include:

  1. Mixed-voltage I2C systems: TCA4311DR enables seamless communication between I2C devices operating at different voltage levels within a single system.
  2. Battery-powered devices: It allows low-voltage I2C devices to communicate with higher-voltage components, such as power management ICs, in battery-powered systems.
  3. Industrial automation: TCA4311DR facilitates communication between I2C devices operating at different voltage levels in industrial control systems.

Detailed and Complete Alternative Models

  • TCA9517: Similar bidirectional translating switch with additional features like level shifting, hot-swapping, and bus buffering.
  • PCA9306: Dual bidirectional I2C-bus and SMBus voltage-level translator with configurable voltage levels.
  • TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.

These alternative models offer similar functionality to TCA4311DR and can be considered based on specific requirements.

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기술 솔루션에 TCA4311DR 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

Sure! Here are 10 common questions and answers related to the application of TCA4311DR in technical solutions:

1. What is TCA4311DR? TCA4311DR is a dual bidirectional I2C bus buffer that provides level shifting and buffering for I2C bus signals.

2. What is the purpose of TCA4311DR? The purpose of TCA4311DR is to enable communication between devices operating at different voltage levels on an I2C bus.

3. What voltage levels does TCA4311DR support? TCA4311DR supports voltage level translation between 1.2V and 5.5V.

4. How many devices can be connected to TCA4311DR? TCA4311DR can support up to 400 pF of bus capacitance, allowing multiple devices to be connected on the I2C bus.

5. Can TCA4311DR be used as a repeater? Yes, TCA4311DR can be used as a repeater to extend the reach of an I2C bus by buffering and regenerating the signals.

6. Does TCA4311DR require external pull-up resistors? Yes, TCA4311DR requires external pull-up resistors on the SDA and SCL lines to provide the required voltage levels.

7. Can TCA4311DR operate in a hot-swappable environment? Yes, TCA4311DR supports hot-swapping of devices on the I2C bus without causing disruption to the communication.

8. Is TCA4311DR compatible with Fast Mode Plus (Fm+) and High-Speed Mode (Hs)? Yes, TCA4311DR is fully compatible with both Fm+ (up to 1 MHz) and Hs (up to 3.4 MHz) I2C bus speeds.

9. Can TCA4311DR be used in automotive applications? Yes, TCA4311DR is AEC-Q100 qualified and can be used in automotive applications that require robust and reliable communication.

10. Are there any special considerations when using TCA4311DR? It is important to ensure proper decoupling and power supply filtering for TCA4311DR to maintain signal integrity and minimize noise on the I2C bus.

Please note that these answers are general and may vary depending on the specific application and requirements.