SN74CBTD3306D

Overview

The SN74CBTD3306D 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 contains two independent 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. Operating temperature ranges from -40 °C to +85 °C.

Feature Summary

• Integrates dual FET bus switches with built-in level shifting capabilities
• Provides -2 V undershoot protection for signal integrity
• Features low on-resistance for efficient signal transmission

Applications

• High-speed data bus switching applications
• Level translation between different voltage domains
• Signal routing in digital communication systems

Procurement Notes

Verify the specific suffix 'D' corresponds to the standard SOIC-8 package configuration. Confirm that the operating voltage requirements align with the 4.5 V to 5.5 V specification. Ensure thermal management meets the -40 °C to +85 °C industrial temperature range requirements. Check for RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a dual-channel bus switch with level shifting is required for 5 V logic systems. Consider the 35 Ω on-resistance for signal loss calculations. Evaluate the 8-pin SOIC footprint against available PCB space. Compare propagation delay characteristics against system timing constraints to ensure signal integrity is maintained.

Part Context

This part belongs to the SN74CBT series of bus switches designed for high-speed applications. It is distinct from the SN74CB3Q3306A which operates at lower voltages (2.3 V to 3.6 V) and offers lower on-resistance. The SN74CBTD3306D is specifically optimized for 5 V operation with added protection features compared to basic switches.

Replacement Considerations

SN74CBTD3306DR is the tape-and-reel version of the same device. SN74CBTD3306CDR is a variant with similar functionality but may have slight parameter differences. Verify pinout compatibility before substitution.