SN74CBT3253DR

Overview

The SN74CBT3253DR 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 a maximum on-resistance of 12 Ohms and supports a bandwidth of 200 MHz. Timing characteristics include a maximum propagation delay of 6.7 ns and a maximum transition time of 6.1 ns. It functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Dual independent channels configured as 1-of-4 multiplexers or demultiplexers
• Integrated -2-V undershoot protection for signal integrity
• Low power consumption with maximum supply current of 3 uA
• Surface-mount construction in SOIC-Narrow-16 package

Applications

• Portable equipment requiring low-voltage signal routing
• Consumer electronics utilizing 5-V bus architectures
• Industrial control systems needing high-speed switching
• Telecommunications infrastructure signal distribution

Procurement Notes

Verify the specific suffix 'DR' corresponds to the SOIC-Narrow-16 package and tape-and-reel shipping configuration. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly process specifications. Ensure the ordering part number matches the exact functional revision intended for your design implementation.

Selection Notes

Select this component when dual independent 1-of-4 switching paths are required within a single integrated circuit. The 5-V operation range makes it suitable for standard logic interfaces. Consider the 12 Ohm on-resistance for signal loss calculations and the 200 MHz bandwidth for high-frequency data applications compared to slower alternatives.

Part Context

This device belongs to the SN74CBT3253C series of high-speed CMOS logic switches. It provides flexible signal routing capabilities for digital systems. The family is designed to replace mechanical relays and discrete transistor switches, offering smaller footprint and faster switching speeds for modern electronic designs.

Replacement Considerations

SN74CBT3253CDR: Pin-compatible alternative in SOIC-16 package. SN74CBT3253DBR: Alternative variant available in SSOP-16 package. Verify pinout compatibility and thermal performance before substituting.