SN74CBTD3306CPWR

Overview

The SN74CBTD3306CPWR is a dual FET bus switch from the Texas Instruments CBT logic family, housed in an 8-pin TSSOP package. It operates within a supply voltage range of 2.7 V to 5.5 V and supports data I/O levels from 0 V to 5.5 V. The device features two independent 1:1 switches with separate output enable inputs. Key electrical characteristics include a maximum on-resistance of 9 ohms and a propagation delay of 0.2 ns at 5 V. It provides -2 V undershoot protection and includes an Ioff function for partial power-down isolation.

Feature Summary

• Integrated active undershoot protection circuitry that detects negative voltage excursions and maintains correct off-state integrity during signal transitions.
• Bidirectional data flow capability with near-zero propagation delay, enabling high-speed signal routing between different voltage domains.
• Ioff functionality prevents current backflow through disabled ports when the device is in a partial power-down state.

Applications

• High-speed data bus switching in portable consumer electronics
• Signal routing between mixed-voltage logic interfaces
• Memory card interface protection and switching

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-8 package and tape-and-reel packaging configuration. Confirm RoHS compliance status and ensure the operating temperature range matches the application requirements. Cross-reference the datasheet revision date to validate parameter accuracy against current manufacturing standards.

Selection Notes

Select this component when bidirectional switching with low on-resistance is required across a wide voltage range. The integrated undershoot protection makes it suitable for applications with fast edge rates or inductive loads. Ensure the control input voltage levels are compatible with the driving logic source within the specified 2.7 V to 5.5 V supply window.

Part Context

This part belongs to the SN74CBT series of high-speed CMOS bus switches. It is functionally related to variants such as the SN74CBTD3306D (SOIC) and SN74CBTD3306CDR (SOIC Reel), differing primarily in package type and shipping format while maintaining identical electrical performance specifications.

Replacement Considerations

Direct pin-compatible alternatives include the SN74CBTD3306D and SN74CBTD3306CDR. Verify package dimensions and thermal characteristics when substituting SOIC packages for TSSOP. Check for updated datasheet revisions to ensure parameter consistency.