SN74LS157DE4

Overview

The SN74LS157DE4 is a quad 2-input multiplexer manufactured by Texas Instruments. It belongs to the 74LS logic family, utilizing Low-Power Schottky (LSTTL) technology for high-speed operation. The device features four independent data selectors with common select and enable inputs. It accepts two sources of four bits of data and selects one source based on the select input. The outputs present selected data in non-inverted form. Key electrical parameters include a propagation delay of 18 ns at 5V, operating voltage range of 4.75V to 5.25V, and standard TTL input/output levels.

Feature Summary

• Quad configuration providing four independent 2-to-1 data selectors
• Common select and enable inputs control all four channels simultaneously
• Non-inverting outputs deliver selected data in true form
• Schottky barrier diode process ensures high speed and low power consumption

Applications

• Data routing between multiple sources in digital systems
• Generating specific logic functions of two variables
• Parallel-to-serial conversion circuits
• Address decoding and selection in memory systems

Procurement Notes

Verify the DE4 suffix indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status through official datasheets or manufacturer documentation. Ensure compatibility with existing 5V LSTTL logic levels in the target design. Check for obsolescence notices or lifecycle status before finalizing procurement plans.

Selection Notes

Select this component when requiring multiple independent 2-to-1 multiplexing functions within a single package. It is suitable for designs needing fast switching speeds with moderate power consumption. Consider pinout compatibility if replacing older LS157 variants. Verify that the 5V supply voltage aligns with system requirements.

Part Context

The SN74LS157DE4 is part of Texas Instruments' extensive 74LS series, which represents Low-Power Schottky TTL logic. This family offers improved speed-power product compared to standard LS devices. The DE4 variant specifically denotes the SOIC-16 surface-mount package with reel packaging, distinguishing it from DIP or other package options within the same logical function family.

Replacement Considerations

• SN74LS157N
• SN74LS157D

FAQ

What is the maximum propagation delay for the SN74LS157DE4?

The typical propagation delay is 18 ns at 5V supply voltage.

Does the SN74LS157DE4 have inverted outputs?

No, the outputs are non-inverting, presenting selected data in true form.