SN74LS157NE4

Overview

The SN74LS157NE4 is a quad 2-input multiplexer manufactured by Texas Instruments. It belongs to the SN54/74LS series of low-power Schottky TTL logic devices. The component features four independent data selectors with common select and enable inputs, allowing the selection of one of two sources for each of the four bits. It provides non-inverting buffered outputs and includes input clamp diodes to limit high-speed termination effects.

Feature Summary

• Quad 2-input multiplexing capability with common control lines
• Low-power Schottky (LS) technology for high speed
• Non-inverting buffered outputs
• Input clamp diodes for high-speed termination

Applications

• Data selection in digital systems
• Signal routing in industrial control applications
• Logic function generation using two variables

Procurement Notes

Verify the specific ordering suffix 'E' indicates lead-free packaging compliant with RoHS standards. Confirm the package type corresponds to the standard 16-pin PDIP configuration. Ensure the operating temperature range aligns with commercial requirements, as military variants exist under different part numbers.

Selection Notes

Select this component when low-power Schottky performance is required for quad multiplexing tasks. Verify compatibility with existing TTL logic families. Consider alternative packages such as SOIC or SOP if surface-mount assembly is preferred over through-hole mounting.

Part Context

This device is part of the broader SN54/74LS family, which utilizes Schottky barrier diode processes to achieve high switching speeds while maintaining lower power consumption compared to standard TTL. The LS designation specifically denotes Low-Power Schottky characteristics within the industry-standard logic lineup.

Replacement Considerations

Compatible substitutes include SN74LS157N and SN74LS157DR. Military-grade equivalents are available under the SN54LS157 designation.