SN74CBT3306CD

Overview

The SN74CBT3306CD is a dual FET bus switch from Texas Instruments, featuring level shifting and -2 V undershoot protection. It operates within a supply voltage range of 4.5 V to 5.5 V. The device provides two independent 1:1 switches in an 8-pin SOIC package. Key electrical parameters include a maximum on-resistance of 35 Ω, a maximum high-level output current of -128 mA, and a maximum low-level output current of 128 mA. Propagation delay is specified at 0.25 ns at 5 V with a 50 pF load. The component supports an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Integrated active undershoot protection circuitry that detects negative voltage excursions and maintains correct off-state functionality down to -2 V.
• Supports bidirectional data flow with near-zero propagation delay for high-speed signal switching applications.
• Enables partial power-down mode operation via the Ioff function to prevent reverse current flow when the device is de-energized.

Applications

• High-speed digital bus switching in consumer electronics
• Signal routing in portable computing devices
• Level shifting between different voltage domains in industrial systems

Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 package variant during sourcing. Confirm RoHS compliance status matches current manufacturing standards. Ensure the ordering part number aligns with the required tape-and-reel or cut-tape quantity specifications for your assembly process.

Selection Notes

Select this component when designing circuits requiring robust protection against signal undershoot events. The 35 Ω on-resistance offers a balance between drive capability and power consumption. Verify that the 4.5 V minimum supply voltage meets the system's power rail requirements before integration.

Part Context

This device belongs to the SN74CBT series of bus switches. It shares functional similarities with other members like the SN74CBTD3306 but differs in specific package options and minor parameter tolerances. The CBT series is designed for low-voltage, high-speed applications requiring minimal signal distortion.

Replacement Considerations

SN74CBTD3306D serves as a direct equivalent with identical logic functions and pinout compatibility. SN74CBTS3306DR offers similar performance in an SOIC package but may have slight variations in electrical characteristics.