SN74LVC257ADBR

Overview

The SN74LVC257ADBR is a quadruple 2-line to 1-line data selector and multiplexer with 3-state outputs, manufactured by Texas Instruments. It operates from a supply voltage of 1.65V to 3.6V and features inputs that accept voltages up to 5.5V. The device provides a maximum propagation delay of 4.6ns at 3.3V. It is housed in a 16-pin SSOP package.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels for bus-organized systems
• Features 3-state outputs that do not load data lines when output-enable is high
• Supports mixed 3.3V and 5V system environments through 5.5V input tolerance

Applications

• Cable Modem Termination Systems
• I/O Expanders
• Motor Drivers
• Network Switches
• Servers

Procurement Notes

Verify the specific ordering suffix 'DBR' corresponds to the SSOP (DB) package type and large tape-and-reel carrier configuration. Confirm the component meets RoHS compliance standards and Level-1 moisture sensitivity ratings before integration into the manufacturing process.

Selection Notes

Select this component for applications requiring low-voltage operation between 1.65V and 3.6V. Ensure the design accommodates the 5.5V input tolerance if interfacing with higher voltage logic sources. Verify thermal management requirements against the junction-to-ambient resistance specifications for the SSOP package.

Part Context

This part belongs to the SNx4LVC257A family of quadruple 2-line to 1-line data selectors and multiplexers. The LVC series is designed for low-voltage CMOS applications, offering balanced output drive and compatibility with various digital signal processing tasks in modern electronic systems.

Replacement Considerations

SN74LVC257ADR serves as a direct functional substitute within the same product family, differing primarily in the SOIC package format rather than electrical performance characteristics.