SN74CBTD3384CPWR

Overview

The SN74CBTD3384CPWR is a high-speed TTL-compatible FET bus switch manufactured by Texas Instruments. It features low ON-state resistance and bidirectional data flow with near-zero propagation delay. The device includes an integrated diode to VCC for level shifting from 5-V inputs down to 3.3-V outputs. It supports partial-power-down mode via Ioff, ensuring no backflow current when powered down. The IC operates within a supply voltage range of 4.5 V to 5.5 V and withstands undershoot up to -2 V on A and B ports.

Feature Summary

• Integrated diode to VCC provides level shifting for 5-V input down to 3.3-V output levels
• Active undershoot-protection circuitry protects against undershoot events up to -2 V
• Supports partial-power-down applications using Ioff feature to prevent damaging backflow current
• Bidirectional data flow with low ON-state resistance allowing minimal propagation delay

Applications

• Memory interleaving
• Bus isolation
• Low-distortion signal gating

Procurement Notes

Verify the specific ordering suffix 'PWRE4' corresponds to the TSSOP-24 package in tape and reel format. Confirm RoHS compliance and lead finish details match project requirements. Ensure the manufacturer part number matches the datasheet SCDS133A specifications before finalizing procurement orders.

Selection Notes

Select this component for designs requiring 5-V to 3.3-V level shifting with bidirectional control. It is suitable for systems needing active protection against undershoot voltages. Consider the TSSOP-24 package constraints and thermal impedance characteristics during PCB layout planning.

Part Context

This device belongs to the SN74CBTD3384C series of high-speed FET bus switches. It is organized as two independent 5-bit bus switches or one 10-bit switch. The series is designed for digital and analog applications requiring low loading and signal distortion.

Replacement Considerations

SN74CBTD3384CDWR

FAQ

How does the device handle undershoot on the A and B ports?

Active undershoot-protection circuitry senses undershoot events and ensures the switch remains in the proper OFF state, providing protection up to -2 V.

What is the function of the integrated diode to VCC?

The integrated diode allows the device to perform level shifting, enabling 5-V input signals to be processed down to 3.3-V output levels.