TCA4311D

Overview

The TCA4311D is a hot-swappable I2C bus buffer manufactured by Texas Instruments. It supports a maximum clock frequency of 400 kHz and operates within a supply voltage range of 2.7 V to 5.5 V. The device draws a typical supply current of 5.1 mA and features an input capacitance of 10 pF. Designed for surface-mount installation, it is available in an 8-VSSOP package. The component functions as a signal buffer and repeater for two-wire bus interfaces, ensuring reliable data transmission in systems requiring hot-swap capabilities.

Feature Summary

• Supports hot-swappable operations on I2C buses without disrupting connected devices
• Provides signal buffering and repeating for two-wire bus communication
• Operates across a wide temperature range suitable for industrial environments

Applications

• I2C bus extension in hot-pluggable systems
• Signal buffering for multi-drop I2C networks
• Level shifting between different voltage domains in embedded systems

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status through official documentation before integration. Check for obsolescence notices or lifecycle changes directly from the manufacturer. Ensure compatibility with existing PCB footprints and soldering profiles. Validate supply chain authenticity through authorized distribution channels.

Selection Notes

Select this component when designing systems that require hot-swap capability for I2C peripherals. Ensure the operating voltage aligns with the 2.7 V to 5.5 V specification. Consider the 8-VSSOP package constraints for board layout. Verify that the 400 kHz speed meets system timing requirements. Evaluate thermal performance within the specified -40°C to +85°C range.

Part Context

The TCA4311D belongs to the TCA4311 family of I2C bus buffers from Texas Instruments. This series is designed to isolate and protect main bus lines from downstream faults during hot insertion. It serves as a critical interface component in complex embedded architectures where multiple I2C devices share a common bus structure.

Replacement Considerations

LTC4313IMS8-1#PBF is listed as a direct substitute option.