SN74CBT3253CDRE4

Overview

The SN74CBT3253CDRE4 is a dual 1-of-4 FET multiplexer/demultiplexer bus switch manufactured by Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V, with a typical operating voltage of 5 V. The device features two independent channels, each configured as a 1:4 selector. Key electrical specifications include a maximum on-resistance of 12 ohms, a maximum propagation delay (tPHL/tPLH) of 6.7 ns, and a maximum transition time (tPHZ/tPLZ) of 6.1 ns. It supports an input signal bandwidth of 200 MHz and maintains low quiescent current. The component is designed for industrial temperature ranges from -40°C to +85°C and is housed in a 16-pin SSOP package.

Feature Summary

• Dual-channel architecture providing two independent 1-of-4 multiplexing paths
• Integrated -2-V undershoot protection for robust signal integrity
• High-speed switching capabilities with low propagation delay
• Low power consumption suitable for battery-operated applications

Applications

• Portable equipment requiring high-density data routing
• Consumer electronics utilizing 5-V bus architectures
• Industrial control systems needing reliable signal switching
• Telecommunications infrastructure components

Procurement Notes

Verify the E4 suffix indicates lead-free composition and RoHS compliance per Texas Instruments standards. Confirm the SSOP-16 package dimensions match your PCB footprint requirements. Ensure the 4 V to 5.5 V operating voltage aligns with your system's power rails. Check that the -40°C to +85°C industrial temperature rating meets your environmental constraints. Validate that the 12-ohm on-resistance is sufficient for your signal integrity needs.

Selection Notes

Select this component when dual independent 1-of-4 switching is required within a single package. It is appropriate for designs needing -2-V undershoot tolerance on 5-V buses. Consider this part for space-constrained applications due to its compact SSOP-16 form factor. Choose it over single-channel alternatives to reduce board area and simplify routing. Ensure the 200 MHz bandwidth satisfies your highest frequency signal requirements.

Part Context

This device belongs to the SN74CBT3253C series of high-speed CMOS logic switches. It is part of Texas Instruments' broader portfolio of bus switch ICs designed for data routing and signal management. The series emphasizes low power and small footprint, targeting modern portable and consumer electronic devices. It complements other multiplexer variants offering different channel counts or voltage levels.

Replacement Considerations

SN74CBT3253CDR is a direct functional equivalent without the E4 suffix. SN74CBT3253CDRG4 offers identical performance with green/RoHS-compliant packaging. SN74CBT3253CDBR provides the same functionality in a standard reel format. Verify pinout compatibility before substituting any variant.