SN74LVC257ARGYR

Overview

The SN74LVC257ARGYR 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 VQFN (RGY) package measuring 4mm x 3.5mm. Latch-up performance exceeds 250mA per JESD 17, and ESD protection exceeds 2000V human-body model standards.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels with shared select and output enable controls for bus-organized systems.
• Features 3-state outputs that do not load data lines when the output-enable input is at a high logic level.
• Supports mixed 3.3V and 5V system environments by accepting input voltages up to 5.5V while operating on lower supply rails.

Applications

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

Procurement Notes

Verify the specific ordering suffix RGYR corresponds to the VQFN 16-pin package with large tape and reel carrier configuration. Confirm the moisture sensitivity level rating and peak reflow temperature requirements align with your assembly process specifications. Ensure the active production status remains valid before finalizing procurement plans.

Selection Notes

Select this component for applications requiring low-voltage operation down to 1.65V with high-speed signal routing capabilities. The 5.5V tolerant inputs facilitate direct interfacing with legacy 5V logic without additional translation circuitry. Consider the thermal resistance characteristics of the exposed thermal pad VQFN package for effective heat dissipation in dense layouts.

Part Context

This part belongs to the SNx4LVC257A family of quadruple 2-line to 1-line data selectors and multiplexers. The family utilizes CMOS technology to deliver balanced output drive and low power consumption. The RGY suffix specifically denotes the VQFN package variant designed for surface-mount applications requiring compact footprints.

Replacement Considerations

SN74LVC257ADBR

FAQ

How does the OE input affect the output state?

When the output-enable (OE) input is at a high logic level, the 3-state outputs enter a high-impedance state and do not load the data lines.

What is the maximum propagation delay specification?

The maximum propagation delay (tpd) is 4.6ns when operating at a supply voltage of 3.3V.