SN74CBT3306CPW

Overview

The SN74CBT3306CPW is a dual FET bus switch manufactured by Texas Instruments, designed for high-speed signal routing in digital systems. It operates on a single power supply ranging from 4.5V to 5.5V and features an 8-pin TSSOP surface-mount package. The device integrates two independent 1:1 switches with level shifting capabilities and includes -2V undershoot protection to ensure reliable operation during voltage transitions.

Feature Summary

• Integrates two independent single-pole single-throw (SPST) bus switches within a compact footprint
• Provides internal level shifting to facilitate seamless communication between different voltage domains
• Includes built-in undershoot protection circuitry to prevent latch-up and damage from negative voltage spikes

Applications

• Level translation between 3.3V and 5V logic interfaces
• High-speed data bus switching in consumer electronics
• Signal routing in portable computing devices

Procurement Notes

Verify the specific suffix CPW against the manufacturer's official datasheet to confirm the TSSOP-8 package configuration. Ensure compatibility with the required operating temperature range of -40°C to +85°C. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring bidirectional data transfer between mixed-voltage logic families. The integrated level shifting eliminates the need for external translation components, reducing board space. Consider the low on-resistance and propagation delay characteristics for applications demanding minimal signal distortion at high frequencies.

Part Context

This part belongs to the Texas Instruments CBT series of bus switches, which are optimized for low power consumption and high bandwidth. The CBTD variant typically denotes enhanced features such as undershoot protection compared to standard versions. It serves as a critical interface component in systems bridging legacy 5V standards with modern lower-voltage processors.

Replacement Considerations

The Nexperia CBTD3306PW is a documented functional equivalent offering identical pinout and specifications. Verify that the replacement maintains the same TSSOP-8 package dimensions and electrical characteristics to ensure direct interchangeability without PCB redesign.