SN74CBTS3306PWR

Overview

The SN74CBTS3306PWR is a dual FET bus switch featuring Schottky diode clamping, designed for 5-V applications. It contains two single-pole, single-throw (SPST) circuits in an 8-pin TSSOP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports temperatures from -40 °C to +85 °C. Key electrical parameters include a maximum on-resistance of 35 Ω, a maximum propagation delay of 0.25 ns at 5 V with 50 pF load, and output currents of ±128 mA.

Feature Summary

• Integrates two SPST FET circuits with integrated Schottky diode clamping for signal protection.
• Provides low on-resistance for efficient signal transmission in high-speed digital interfaces.
• Supports level shifting capabilities between different voltage domains.

Applications

• High-speed data bus switching in consumer electronics
• Signal routing in portable computing devices
• Interface isolation in industrial control systems

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-8 package and tape-and-reel delivery format as defined by Texas Instruments. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure that unused control inputs are properly terminated to VCC or GND during implementation to guarantee stable operation. Cross-reference the datasheet revision to ensure compatibility with current manufacturing specifications.

Selection Notes

Select this component when a 5-V logic interface requires bidirectional switching with overvoltage protection. The integrated Schottky diodes eliminate the need for external clamping components, reducing board space. Compare the 35 Ω on-resistance against system impedance requirements to minimize signal attenuation. Consider the TSSOP-8 footprint constraints relative to available PCB real estate.

Part Context

This part belongs to the SN74CBT family of bus switches, which are optimized for low power consumption and fast switching speeds. It serves as a functional alternative to standard logic buffers where signal isolation or direction control is necessary. The inclusion of Schottky clamping distinguishes it from basic switches like the SN74CBTD3306, offering enhanced protection against voltage spikes on the bus lines.

Replacement Considerations

The SN74CBTD3306D may serve as a substitute if Schottky clamping is not required, though it lacks the specific overvoltage protection features. Verify pinout compatibility and electrical parameter alignment before substitution.

FAQ

What is the function of the Schottky diodes in this device?

The integrated Schottky diodes provide clamping protection to prevent undershoot or overshoot voltages from damaging the connected circuitry or causing latch-up conditions.

How should unused control inputs be handled?

All unused control inputs must be held at VCC or GND to ensure proper device operation and prevent undefined states.