TCA4311DR

Overview

The TCA4311DR is a hot-swappable two-wire bus buffer manufactured by Texas Instruments. It supports clock frequencies up to 400 kHz and operates within a temperature range of -40°C to +85°C. The device is housed in an SOIC-8 surface-mount package and is supplied in reel packaging with a factory quantity of 2500 units. This component functions as a signal buffer for I2C or SMBus applications, providing isolation between bus segments while allowing safe connection and disconnection under power.

Feature Summary

• Supports hot-swappable insertion and removal on active two-wire buses without disrupting system operation.
• Provides electrical isolation between upstream and downstream bus segments to prevent fault propagation.
• Compatible with standard I2C and SMBus communication protocols.

Applications

• Hot-pluggable peripheral expansion systems
• I2C bus segmentation for fault isolation
• SMBus interface buffering in industrial equipment

Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before implementation, as this indicates the component may be discontinued or superseded. Confirm that the SOIC-8 package and 400 kHz speed meet current design requirements. Ensure supply chain stability given the potential end-of-life designation and check for valid alternative sources if long-term production is required.

Selection Notes

Select this component when designing systems requiring safe hot-swap capabilities for I2C or SMBus devices. The SOIC-8 package suits space-constrained PCB layouts. Verify that the 400 kHz maximum frequency aligns with the target bus speed. Consider the operating temperature range of -40°C to +85°C for environmental compatibility in industrial or commercial settings.

Part Context

The TCA4311 belongs to the TCA4311 series of bus extenders and buffers from Texas Instruments. It is specifically engineered for managing two-wire bus architectures where physical connectivity changes occur frequently. The DR suffix denotes the SOIC-8 tape-and-reel packaging variant, distinguishing it from tube or cut-tape options within the same functional family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the NRND status, consult official Texas Instruments resources for current lifecycle updates or recommended alternatives.