DM74LS158N

Overview

The DM74LS158N is a Quad 2-Line to 1-Line Data Selector/Multiplexer manufactured by onsemi. It operates within a supply voltage range of 4.75V to 5.25V and supports a free air operating temperature from 0°C to +70°C. The device features buffered inputs and outputs, providing inverted data presentation to minimize propagation delay time. It utilizes a 16-Lead Plastic Dual-In-Line Package (PDIP) with a JEDEC MS-001 standard width.

Feature Summary

• Contains four independent multiplexers that select between two data sources for routing to four output gates
• Includes a separate strobe input to control data selection functionality
• Presents inverted data at the outputs to reduce overall propagation delay time

Applications

• Expand any data input point
• Multiplex dual data buses
• Generate four functions of two variables where one variable is common
• Source programmable counters

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm package integrity and pin alignment against the 16-Lead PDIP specification. Ensure environmental compliance requirements match project standards before finalizing procurement decisions.

Selection Notes

Select this component when inverted logic levels are required to optimize signal timing in multiplexing applications. Consider the specific propagation delay characteristics compared to non-inverted variants like the DM74LS157. Evaluate power dissipation requirements relative to the typical 24 mW consumption for system thermal management.

Part Context

This part belongs to the 74LS series of logic integrated circuits, designed for low-power Schottky TTL applications. It serves as the inverted-output counterpart to the DM74LS157, offering similar quad multiplexing capabilities but with optimized delay performance due to its inverted data presentation architecture.

Replacement Considerations

DM74LS157N

FAQ

How does the DM74LS158N differ from the DM74LS157?

The DM74LS158N presents inverted data to minimize propagation delay time, whereas the DM74LS157 presents true data.

What is the function of the strobe input?

A separate strobe input is provided to control the data selection process for the four output gates.