SN74CBT3306PW

Overview

The SN74CBT3306PW is a dual FET bus switch from Texas Instruments' CBT logic series, housed in an 8-pin TSSOP package. It operates within a supply voltage range of 4.5 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 14 Ω at 4 V and a propagation delay of 0.35 ns at 4 V with a 50 pF load. It functions reliably across an operating temperature range of -40 °C to +85 °C.

Feature Summary

• Features active undershoot protection circuits that detect undershoot events and maintain correct off-state conditions down to -2 V.
• Supports bidirectional data flow with near-zero propagation delay for high-speed signal transmission.
• Enables partial power-down mode operation via the Ioff function to prevent reverse current during power-off states.

Applications

• High-speed digital and analog signal switching applications
• Portable equipment requiring low power consumption
• Computing and consumer electronics systems

Procurement Notes

Verify the specific suffix 'PW' corresponds to the 8-TSSOP package variant when sourcing. Confirm RoHS compliance status and moisture sensitivity level (MSL 1) requirements against your assembly process specifications. Ensure the supply voltage aligns with the 4.5 V to 5.5 V operational range defined in the datasheet.

Selection Notes

Select this component for designs requiring TTL-compatible control inputs driven by 5 V or 3.3 V CMOS outputs. The low input/output capacitance minimizes signal distortion and loading effects. Consider the 8-TSSOP package dimensions if board space is constrained compared to standard SOIC options.

Part Context

This part belongs to the SN74CBT3306 family of high-speed bus switches. Variants such as SN74CBT3306D utilize an SOIC-8 package, while SN74CBT3306PWR uses a PowerTSSOP-8 package. All variants share the same core dual-channel functionality but differ in physical footprint and thermal characteristics.

Replacement Considerations

SN74CBT3306D serves as a pin-compatible alternative in an SOIC-8 package. SN74CBT3306PWR offers a similar surface-mount solution in a PowerTSSOP-8 package. Verify package dimensions and thermal resistance values before substitution.