SN74CBT3384CDGVR

Overview

The SN74CBT3384CDGVR is a high-speed TTL-compatible FET bus switch manufactured by Texas Instruments. It features two independent 5-bit bus switches, functioning as a single 10-bit switch or dual 5-bit units with separate output-enable inputs (1OE, 2OE). 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 maximum control input leakage current of ±1 µA. It provides active undershoot protection up to -2 V on A and B ports.

Feature Summary

• Active undershoot-protection circuitry ensures proper OFF state during negative voltage events on data ports.
• Supports partial-power-down mode via Ioff feature to prevent damaging backflow currents when powered down.
• Bidirectional data flow capability with near-zero propagation delay characteristics.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'DGVR' corresponds to the TVSOP-24 package and tape-and-reel quantity of 2000 units. Confirm RoHS compliance status and lead finish details against the latest Package Option Addendum. Ensure the design accommodates the specified operating temperature range of -40°C to 85°C for this variant.

Selection Notes

Select this component for designs requiring low ON-state resistance and high-speed switching in 5 V logic environments. The TVSOP-24 package offers a compact footprint suitable for space-constrained layouts. Consider the separate enable inputs if independent control of the two 5-bit sections is required rather than a unified 10-bit operation.

Part Context

This part belongs to the SN74CBT3384C series of high-speed FET bus switches. It is functionally compatible with other variants in the family such as SN74CBT3384CDWR (SOIC) and SN74CBT3384CPWR (TSSOP), differing primarily in package type and manufacturing lot traceability. The 'C' designation indicates specific performance characteristics defined in the datasheet.

Replacement Considerations

Direct pin-to-pin replacements include SN74CBT3384CDWR and SN74CBT3384CPWR. Verify that the alternative package maintains the same thermal impedance and mechanical dimensions for your PCB layout. Ensure the substitute part meets the same 4 V to 5.5 V operating voltage requirements.