SN74LVC257AQDRG4Q1

Overview

The SN74LVC257AQDRG4Q1 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 accepts input voltages up to 5.5V. The device features a maximum propagation delay of 4.6ns at 3.3V. It is housed in a 16-pin SOIC package.

Feature Summary

• Qualified for automotive applications
• ESD protection exceeds 2000V per MIL-STD-883, method 3015
• Inputs accept voltages to 5.5V

Applications

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

Procurement Notes

Verify the specific suffix 'RG4Q1' indicates AEC-Q100 qualification and RoHS compliance. Confirm the SOIC-16 package type matches the design footprint. Ensure the operating temperature range meets system requirements.

Selection Notes

Select this component for mixed-voltage systems requiring translation between 3.3V and 5V logic levels. Use when bus-organized systems need multiplexing of 4-bit data sources. Consider the 3-state output capability for minimizing line loading.

Part Context

This part belongs to the SN74LVC257A-Q1 family of quadruple multiplexers. It is designed for 2.7V to 3.6V operation but supports wider voltage ranges. The device ensures high-impedance states during power-up or power-down when OE is tied to VCC through a pullup resistor.

Replacement Considerations

SN74LVC257ADRQ1

FAQ

How does the device handle unused inputs?

Unused inputs must not float. They should be connected to a high or low bias, typically tied to GND or VCC, to prevent undefined operational states.

What is the function of the OE pin?

The Output Enable (OE) pin controls the 3-state outputs. When OE is high, the outputs are in a high-impedance state. When OE is low, the selected inputs are passed to the outputs.