SN74LVC257ADRG4

Overview

The SN74LVC257ADRG4 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, enabling use in mixed 3.3V or 5V system environments. The device provides a maximum propagation delay of 4.6ns at 3.3V. It includes latch-up performance exceeding 250mA per JESD 17 and ESD protection exceeding 2000V human-body model and 200V machine model standards.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels with high-speed signal selection capabilities.
• Features 3-state outputs that prevent loading on data lines when the output-enable input is at a high logic level.
• Supports mixed-voltage operation by accepting 5V inputs while operating on lower supply voltages down to 1.65V.

Applications

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

Procurement Notes

Verify the specific package type and environmental compliance markings against the official datasheet before procurement. Confirm that the ordering suffix matches the required reel quantity and lead finish specifications. Ensure the component meets the intended operating temperature range for the target application environment.

Selection Notes

Select this component for bus-organized systems requiring multiplexing of 4-bit data sources to 4-output data lines. Consider its low power dissipation capacitance and fast switching speeds for high-frequency applications. Verify compatibility with existing logic families due to its wide input voltage tolerance and 3-state output control.

Part Context

This part belongs to the SNx4LVC257A family of quadruple 2-line to 1-line data selectors and multiplexers. It utilizes CMOS technology to provide balanced output drive and is designed for digital signal data selector applications. The device is suitable for down-level translation and multiplexer functions within complex electronic systems.

Replacement Considerations

SN74LVC257ADR

FAQ

How does the device handle mixed voltage environments?

The inputs can be driven from either 3.3V or 5V devices, allowing the SN74LVC257ADRG4 to function as a translator in mixed voltage system environments.

What is the state of the outputs when OE is high?

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.