SN74CBT3253DRE4

Overview

The SN74CBT3253DRE4 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 2 x 1:4 switch. Key electrical specifications include a maximum on-resistance of 12 ohms, a maximum propagation delay of 6.7 ns, and a maximum turn-on time of 6.1 ns. It supports an input signal bandwidth of 200 MHz and maintains low quiescent current of 3 uA maximum. The component functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Dual-channel architecture providing two independent 1-of-4 multiplexing paths for flexible signal routing
• Integrated -2-V undershoot protection capability to safeguard inputs against transient voltage spikes
• Low on-resistance design ensures minimal signal attenuation and high-fidelity data transmission
• High-speed switching performance with nanosecond-level propagation delays suitable for fast digital buses

Applications

• Portable equipment requiring efficient signal path management
• Consumer electronics utilizing high-speed data interfaces
• Industrial control systems needing reliable multiplexing solutions
• Telecommunications infrastructure supporting signal distribution

Procurement Notes

Verify the specific package variant, as the 'D' suffix typically denotes SSOP packaging while other variants may use different footprints. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the ordering part number matches the exact pin configuration and electrical characteristics needed for your circuit design before finalizing procurement.

Selection Notes

Select this component when designing circuits that require dual independent multiplexing paths with low insertion loss. It is appropriate for applications demanding high-speed signal integrity and robust input protection against negative voltage transients. Consider the thermal operating range and power supply constraints to ensure compatibility with the target system environment and performance 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 switches designed for portable and consumer applications. The family emphasizes low power consumption and small form factors, making it suitable for space-constrained designs where signal routing efficiency is critical.

Replacement Considerations

SN74CBT3253CDR and SN74CBT3253DBR are functionally equivalent parts within the same series. Verify package compatibility if substituting between SOIC and SSOP variants. Ensure that any replacement maintains the same voltage ratings and switching speeds to preserve circuit performance.