SN74CBT3257CDBR

Overview

The SN74CBT3257CDBR is a 4-bit FET multiplexer/demultiplexer manufactured by Texas Instruments. It features a dual 1-of-4 configuration housed in an SSOP-16 package. The device operates within a supply voltage range of 4 V to 5.5 V. 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 bidirectional data flow and functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Provides dual independent 1-of-4 multiplexing paths for signal routing
• Utilizes low on-resistance FET technology for minimal signal attenuation
• Supports bidirectional data transmission between selected inputs and outputs

Applications

• Data bus switching applications requiring high-speed signal selection
• Multiplexing multiple input sources to a single output destination
• Demultiplexing a single input source to multiple output destinations

Procurement Notes

Verify the specific suffix 'CDBR' corresponds to the SSOP-16 package and reel packaging format when ordering. Confirm that the 4V to 5.5V operating voltage aligns with the target system power rails. Ensure the -40°C to +85°C industrial temperature rating meets environmental requirements. Cross-reference the datasheet for pinout compatibility if replacing existing components.

Selection Notes

Select this component when a dual-channel 1-of-4 mux/demux solution is required within standard 5V logic systems. The SSOP-16 package offers a compact surface-mount footprint suitable for space-constrained designs. Consider the 12-ohm on-resistance and sub-7ns switching speeds for performance-critical signal integrity applications.

Part Context

This part belongs to the Texas Instruments SN74CBT series of high-speed CMOS logic devices. The CBT series is designed for low-voltage digital applications requiring fast switching times and low power consumption. The SN74CBT3257 specifically addresses needs for flexible data path configuration in consumer electronics and industrial control systems.

Replacement Considerations

Check for direct pin-compatible alternatives within the same logic family. Verify that substitute parts maintain the same 4V-5.5V supply voltage range and SSOP-16 package dimensions to ensure mechanical fit.