SN74CBT3384CPWR

Overview

The SN74CBT3384CPWR is a high-speed TTL-compatible FET bus switch manufactured by Texas Instruments. It features two independent 5-bit bus switches, functioning as either two 5-bit or one 10-bit bidirectional data path. The device operates within a supply voltage range of 4 V to 5.5 V and supports data I/O levels from 0 V to 5 V. Key electrical parameters include a typical ON-state resistance (ron) of 3 Ω, maximum propagation delay of 0.24 ns at 4 V and 0.15 ns at 5 V, and low input/output capacitance of 5 pF in the OFF state. It includes active undershoot protection up to -2 V on A and B ports.

Feature Summary

• Bidirectional data flow with near-zero propagation delay
• Active undershoot-protection circuitry for off-isolation
• Low ON-state resistance characteristics
• Supports partial-power-down mode operation

Applications

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

Procurement Notes

Verify the specific ordering suffix 'PWRE4' against the manufacturer's current package option addendum to confirm lead finish, moisture sensitivity level, and RoHS compliance status. Ensure the procurement channel provides valid traceability documentation matching the original manufacturer's specifications.

Selection Notes

Select this component when designing systems requiring high-speed bidirectional switching between 4-V and 5.5-V logic domains. The low capacitance minimizes signal distortion, making it suitable for high-frequency applications. Verify that control inputs are driven by compatible TTL or CMOS outputs.

Part Context

This part belongs to the SN74CBT3384C series of digital bus switches. It is housed in a 24-pin TSSOP package. The device is designed for applications demanding minimal loading and fast switching speeds within standard 5-V logic environments.

Replacement Considerations

SN74CBT3384CDWR

FAQ

How does the device handle undershoot events?

The SN74CBT3384CPWR includes active undershoot-protection circuitry on the A and B ports that senses an undershoot event and ensures the switch remains in the proper OFF state, protecting against voltages down to -2 V.

Can the two 5-bit switches operate independently?

Yes, the device is organized as two 5-bit bus switches with separate output-enable (1OE, 2OE) inputs, allowing them to function independently or combined as a single 10-bit switch.