SN74LVC257APW

Overview

The SN74LVC257APWRG4 is a quad 2-to-1 data selector/multiplexer with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 1.65V to 3.6V and features a maximum propagation delay of 4.6ns at 3.3V. The device provides high noise immunity and low power consumption, suitable for battery-powered applications. It includes ESD protection exceeding 2000V per MIL-STD-883 Method 3015 and latch-up performance exceeding 250mA per JESD 17 standards.

Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• Three-state outputs that prevent loading of data lines when disabled
• Wide operating voltage range supporting low-power system designs
• High electrostatic discharge protection meeting rigorous military standards

Applications

• I/O expanders in embedded systems
• Motor drive control circuits
• Server infrastructure signal routing
• Network switch data path selection
• Telecommunications equipment interfaces

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and environmental compliance. Ensure the ordering code matches the required tape-and-reel or tube packaging format. Confirm RoHS status and lead-free specifications align with assembly requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Selection Notes

Select this component for applications requiring multiple independent data paths with minimal propagation delay. The wide voltage range allows compatibility with various logic families. Verify that the 3-state output capability meets bus isolation requirements. Consider thermal dissipation limits if operating near maximum temperature ranges. Ensure input voltage levels remain within specified tolerances relative to the supply voltage.

Part Context

This device belongs to the SN74LVC257A family of data selectors. It serves as a digital switching solution for routing signals between sources and destinations. The LVC series offers improved speed and lower power compared to older CMOS technologies. It is designed for general-purpose digital logic applications requiring reliable signal multiplexing in compact packages.

Replacement Considerations

SN74LVC257ADBR: Quad 2-to-1 multiplexer in SSOP-16 package. SN74LVC257ADR: Quad 2-to-1 multiplexer in SOIC-16 package. SN74AS257N: Quad 2-to-1 multiplexer in PDIP-16 package with different voltage and speed characteristics.