SN74CBT3383CDWR

Overview

The SN74CBT3383CDWR is a 10-bit FET bus-exchange switch manufactured by Texas Instruments. It operates within a VCC supply range of 4 V to 5.5 V and supports data I/O signaling levels from 0 V to 5 V, including 0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V standards. The device features active undershoot protection on A and B ports up to −2 V. Typical ON-state resistance (ron) is 3 Ω at VCC=4.5V, with a maximum propagation delay of 0.24 ns. Control inputs are TTL or 5-V/3.3-V CMOS compatible. It is housed in a 24-pin SOIC package.

Feature Summary

• Active undershoot-protection circuitry on A and B ports ensures proper OFF state during undershoot events up to -2 V.
• Bus exchange functionality allows bidirectional data flow and nibble swapping between signal ports via the BX input.
• Supports partial-power-down mode operation using Ioff to prevent damaging backflow current when powered down.
• Low input/output capacitance minimizes loading and signal distortion for high-speed digital and analog applications.

Applications

• PCI interface
• Memory interleaving
• Bus isolation
• Enterprise servers
• Ethernet switches

Procurement Notes

Verify the specific ordering suffix 'DW' corresponds to the SOIC-24 tube packaging configuration. Confirm that the component meets RoHS compliance requirements as specified in the manufacturer's documentation. Ensure the operating temperature range aligns with system thermal constraints. Validate pinout compatibility with existing PCB footprints before integration.

Selection Notes

Select this component for designs requiring low propagation delay and bidirectional data transfer capabilities. The device is suitable for systems needing byte swapping or multiplexing functions. Verify control input voltage levels match the available logic outputs. Consider the thermal characteristics if multiple devices operate simultaneously in confined spaces.

Part Context

This part belongs to the SN74CBT3383C series of high-speed TTL-compatible FET bus-exchange switches. It is designed for applications demanding minimal signal distortion and fast switching speeds. The series includes variants with different packaging options such as SSOP and TSSOP, all sharing the same core electrical specifications and functional behavior.

Replacement Considerations

SN74CBT3383CDW is the tube-packaged equivalent of the tape-and-reel SN74CBT3383CDWR variant. Both share identical electrical characteristics and pinouts. Verify package dimensions and moisture sensitivity levels when substituting between tube and reel formats.