SN74LVC257AQDRQ1

Overview

The SN74LVC257AQDRQ1 is an automotive-grade quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs. It operates from a supply voltage of 2V to 3.6V and features inputs that accept voltages up to 5.5V, enabling translation in mixed-voltage systems. The device provides a maximum propagation delay of 4.6ns at 3.3V and includes ESD protection exceeding 2000V per MIL-STD-883 method 3015.

Feature Summary

• Qualified for automotive applications
• Operates from 2V to 3.6V supply voltage
• Inputs accept voltages up to 5.5V

Applications

• I/O expanders
• Motor drivers
• Servers
• Network switches
• Telecommunications infrastructure

Procurement Notes

Verify the specific package type (SOIC, TSSOP, or WQFN) required for your design, as the SN74LVC257A-Q1 family supports multiple configurations. Confirm that the selected variant meets the necessary thermal and mechanical specifications for your intended operating environment. Ensure compatibility with your system's voltage levels and signal integrity requirements before finalizing procurement.

Selection Notes

Select this component when designing bus-organized systems requiring multiplexing of 4-bit data sources to 4-output data lines. It is suitable for environments where mixed 3.3V/5V operation is necessary due to its 5.5V input tolerance. Consider the 3-state output capability to prevent loading on data lines when the output-enable input is high.

Part Context

This part belongs to the SN74LVC257A-Q1 series, which are quadruple 2-line to 1-line data selectors/multiplexers designed for automotive applications. The series is characterized by low voltage operation and high-speed performance, making it ideal for modern electronic systems requiring reliable data routing under varying voltage conditions.

Replacement Considerations

SN74LVC257ADRQ1

FAQ

How does the SN74LVC257AQDRQ1 handle mixed voltage systems?

The device inputs can be driven from either 3.3V or 5V devices, allowing it to function as a translator in mixed 3.3V/5V system environments.

What is the purpose of the OE pin?

The Output Enable (OE) pin controls the 3-state outputs. When OE is at a high logic level, the outputs do not load the data lines.