SN74CBTD3306CPW

Overview

The SN74CBTD3306CPW is a dual FET bus switch from Texas Instruments, 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 voltages from 0 V to 5.5 V. The device features two independent 1:1 switches with separate output enable inputs. Key electrical parameters include a maximum on-resistance of 14 Ω at 5 V and a typical propagation delay of 0.3 ns at 5 V with a 50 pF load. It offers low input/output capacitance of 5 pF and includes active undershoot protection down to -2 V.

Feature Summary

• Active undershoot protection prevents false switching during signal transitions by clamping negative excursions to -2 V.
• Supports partial power-down mode via the Ioff function, preventing reverse current flow when the device is unpowered.
• Provides bidirectional data transmission with minimal signal distortion due to low on-resistance and capacitance.

Applications

• High-speed data buses requiring level shifting between different voltage domains
• Portable equipment where low standby current and partial power-down capabilities are critical
• Consumer electronics utilizing high-density bus architectures

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-8 package variant. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring robust undershoot protection and bidirectional switching. Ensure the operating voltage aligns with the 2.7 V to 5.5 V range. Consider the TSSOP-8 package constraints for PCB layout and thermal management requirements.

Part Context

This part belongs to the SN74CBT series of high-speed CMOS bus switches. It is designed for low-voltage and 3.3-V systems, offering superior performance over standard logic families in terms of speed and power consumption while maintaining TTL/CMOS compatibility.

Replacement Considerations

Check for direct pin-compatible alternatives such as the SN74CBTD3306D (SOIC) or SN74CBTD3306CDR (SOIC-8) if package changes are permissible. Verify functional equivalence regarding on-resistance and propagation delay specifications.