SN74CBT3305CDR

Overview

The SN74CBT3305CDR is a dual FET bus switch manufactured by Texas Instruments, housed in an SOIC-8 surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports signal frequencies up to 200 MHz. Key electrical specifications include a maximum on-resistance of 12 ohms and a propagation delay of 150 ps. The device functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Provides powered-off protection to prevent current leakage when the device is unpowered.
• Includes -2 V undershoot protection to tolerate signal excursions below ground potential.
• Features low on-resistance for efficient signal transmission with minimal attenuation.

Applications

• High-speed data bus switching in portable electronic devices
• Signal routing in consumer electronics requiring low power consumption
• Interface isolation in systems with varying voltage domains

Procurement Notes

Verify the specific revision suffix (e.g., CDR) against the manufacturer's latest datasheet to ensure compatibility with required packaging and tape-and-reel specifications. Confirm that the operating voltage and temperature ranges align with the target system environment before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring bidirectional bus switching with low capacitance and high bandwidth. Ensure the design accommodates the 4.5 V to 5.5 V supply requirement and utilizes the SOIC-8 footprint. Consider the -2 V undershoot tolerance if interfacing with signals that may exhibit negative transients.

Part Context

This part belongs to the SN74CBT330x series of 5-V bus switches designed for high-speed data transfer. It offers a compact solution for managing multiple data lines in space-constrained environments while maintaining signal integrity through low on-resistance and fast switching speeds.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family, such as the SN74CBT3306C, noting differences in channel configuration. Verify functional equivalence regarding voltage levels and protection features before substitution.

FAQ

Does the SN74CBT3305CDR support bidirectional signal flow?

Yes, it is designed as a dual FET bus switch capable of handling bidirectional data transmission between ports.

What is the maximum operating frequency of this device?

The device supports signal frequencies up to 200 MHz, making it suitable for high-speed digital interfaces.