SN74CBT3253CDR

Overview

The SN74CBT3253CDR 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 multiplexer. Key electrical specifications include a maximum on-resistance of 12 ohms, a maximum propagation delay of 6.7 ns, and a maximum turn-off time of 6.1 ns. It supports input signals down to -2 V due to undershoot protection. The component functions reliably across an industrial temperature range from -40°C to +85°C and is housed in a 16-pin SOIC package.

Feature Summary

• Dual-channel architecture providing two independent 1-to-4 multiplexing paths for signal routing
• Integrated -2 V undershoot protection allowing compatibility with higher voltage logic interfaces
• Low on-resistance design ensuring minimal signal attenuation during active transmission states

Applications

• High-speed data bus switching in consumer electronics
• Signal routing in portable computing devices
• Multiplexing control lines in industrial automation systems

Procurement Notes

Verify the specific package variant against project requirements, as the SN74CBT3253C series includes multiple footprint options such as SSOP and VQFN. Confirm that the selected part number matches the required pinout and thermal characteristics. Ensure compliance with RoHS directives if applicable to the manufacturing region. Cross-reference the datasheet revision date to confirm the availability of the latest electrical parameters and mechanical drawings before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring dual independent 1-to-4 signal routing with low distortion. The 12-ohm on-resistance makes it suitable for applications demanding high signal integrity at moderate speeds. Consider the -2 V undershoot tolerance if interfacing with legacy or mixed-voltage logic families. The wide supply voltage range accommodates standard 5 V systems while maintaining performance margins.

Part Context

This device belongs to the SN74CBT3253C family of high-speed CMOS logic switches. It is functionally similar to the SN74CBT3253CDR but may differ in packaging, such as the SSOP-16 variant found in the SN74CBT3253CDBR. The family shares core electrical characteristics, including the dual 1-of-4 configuration and 5 V operation, designed for efficient space-constrained PCB layouts.

Replacement Considerations

The SN74CBT3253DBR serves as a direct functional substitute with identical electrical specifications, differing primarily in its SSOP-16 package instead of the SOIC-16 form factor.