TCA4311DGKR

Product Overview

Category

TCA4311DGKR belongs to the category of digital bus switches.

Use

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

Characteristics

• Provides bidirectional voltage-level translation between low-voltage (LV) and high-voltage (HV) I2C buses
• Supports I2C bus speeds up to 400 kHz
• Features a low ON-state resistance, minimizing signal distortion
• Offers a wide operating voltage range from 1.65 V to 5.5 V
• Supports hot insertion and removal without bus contention or data corruption
• Provides overvoltage tolerance on LV and HV pins, protecting against voltage spikes
• Includes a fail-safe feature that ensures the bus remains operational even if one supply rail fails

Package and Quantity

TCA4311DGKR is available in a small 8-pin VSSOP package. It is typically sold in reels of 3000 units.

Specifications

• Supply Voltage Range: 1.65 V to 5.5 V
• Operating Temperature Range: -40°C to +85°C
• ON-State Resistance: 3 Ω (typical)
• Maximum Bus Current: ±50 mA
• ESD Protection: >4 kV HBM, >500 V CDM

Pin Configuration

The pin configuration of TCA4311DGKR is as follows:

```

---

| | --| A1 VCC|-- --| A0 SDA|-- --| GND SCL|-- --| OE B1|-- --| B0 B2|-- --| EN B3|-- --| NC NC|-- |___________| ```

Functional Features

• Bidirectional voltage-level translation between LV and HV I2C buses
• Automatic direction sensing, eliminating the need for external control signals
• Low ON-state resistance for minimal signal distortion
• Fail-safe feature ensures bus operation even with a failed supply rail
• Overvoltage tolerance protects against voltage spikes
• Supports hot insertion and removal without bus contention or data corruption

Advantages and Disadvantages

Advantages

• Simplifies level shifting and buffering in I2C bus applications
• Wide operating voltage range allows compatibility with various systems
• High-speed operation supports I2C bus speeds up to 400 kHz
• Fail-safe feature enhances system reliability
• Small package size saves board space

Disadvantages

• Limited maximum bus current may not be suitable for high-current applications
• Lack of additional features such as built-in pull-up resistors

Working Principles

TCA4311DGKR operates by automatically sensing the direction of data flow on the I2C bus. It translates the voltage levels between the low-voltage (LV) and high-voltage (HV) sides, allowing seamless communication between devices operating at different voltage levels. The device incorporates fail-safe circuitry that ensures uninterrupted bus operation even if one of the supply rails fails.

Application Field Plans

TCA4311DGKR finds extensive use in various applications involving I2C bus communication, including but not limited to: - Consumer electronics - Industrial automation - Automotive systems - Medical devices - Telecommunications equipment

Alternative Models

Some alternative models that offer similar functionality to TCA4311DGKR include: - PCA9306DCTR - TXB0108PWR - BSS138LT1G - SN74LVC1T45DBVR

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

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