TCA4311ADGKR

Product Overview

Category

TCA4311ADGKR belongs to the category of digital bus switches.

Use

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

Characteristics

• Supports bidirectional voltage-level translation between low-voltage (LV) and high-voltage (HV) I2C buses
• Provides overvoltage tolerance on LV input/output pins
• Features a low ON-state resistance to minimize signal distortion
• Offers a high degree of ESD protection
• Operates at a wide supply voltage range

Package

TCA4311ADGKR is available in a small 8-pin VSSOP package.

Essence

The essence of TCA4311ADGKR lies in its ability to facilitate communication between LV and HV I2C buses by providing level shifting and buffering capabilities.

Packaging/Quantity

This product is typically packaged in reels, with each reel containing a specific quantity of TCA4311ADGKR units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• ON-State Resistance: 3.5Ω (typical)
• Maximum Data Rate: 400kHz
• ESD Protection: ±8kV HBM, ±15kV IEC61000-4-2 Air-Gap Discharge, ±8kV IEC61000-4-2 Contact Discharge

Detailed Pin Configuration

The TCA4311ADGKR has the following pin configuration:

1. SDA_IN: Input data signal for the low-voltage side.
2. SCL_IN: Input clock signal for the low-voltage side.
3. GND: Ground reference.
4. OE: Output enable control pin.
5. SDA_OUT: Output data signal for the high-voltage side.
6. SCL_OUT: Output clock signal for the high-voltage side.
7. VCC: Supply voltage input.
8. ADDR: Address selection pin.

Functional Features

• Bidirectional level shifting between LV and HV I2C buses
• Automatic direction sensing and control
• Overvoltage tolerance on LV input/output pins
• Low ON-state resistance for minimal signal distortion
• ESD protection for enhanced reliability
• Wide supply voltage range for versatile applications

Advantages and Disadvantages

Advantages

• Simplifies interfacing between LV and HV I2C buses
• Provides reliable level shifting and buffering capabilities
• Offers protection against overvoltage events
• Compact package size for space-constrained designs
• Wide operating temperature range for various environments

Disadvantages

• Limited to I2C bus applications
• May not be suitable for applications requiring higher data rates

Working Principles

TCA4311ADGKR operates by automatically sensing the direction of data flow between the LV and HV I2C buses. It uses a bidirectional level shifter to translate the voltage levels between the two buses, ensuring proper communication. The device also incorporates overvoltage protection on the LV input/output pins to safeguard against potential damage.

Detailed Application Field Plans

TCA4311ADGKR finds application in various scenarios where level shifting and buffering are required in I2C bus communication. Some specific use cases include:

1. Interfacing low-voltage microcontrollers with high-voltage I2C devices.
2. Enabling communication between different voltage domains within a system.
3. Facilitating communication between LV and HV I2C devices in industrial automation systems.
4. Supporting I2C bus communication in automotive electronics.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to TCA4311ADGKR are:

1. PCA9306: Bidirectional I2C-bus and SMBus voltage-level translator.
2. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.
3. BSS138: Logic-level N-channel MOSFET for level shifting applications.

These alternative models can be considered based on specific requirements and design constraints.

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