DM74S157N

Overview

The DM74S157N is a Quad 1 of 2 Line Data Selector/Multiplexer manufactured by onsemi. It contains inverters and drivers to supply full on-chip data selection to four output gates, presenting true data. The device operates with a supply voltage range of 4.75 V to 5.25 V and features buffered inputs and outputs. Typical propagation delay time is 5 ns at VCC = 5V and TA = 25°C. Typical power dissipation is 250 mW. It utilizes a 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide.

Feature Summary

• Contains inverters and drivers for full on-chip data selection to four output gates
• Features buffered inputs and outputs
• Includes a separate strobe input for control

Applications

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

Procurement Notes

Verify the component status as discontinued or obsolete through official manufacturer channels before procurement planning. Confirm that the specific PDIP package variant matches design requirements. Ensure compliance with life support policies if applicable, as Fairchild products require express written approval for such uses. Cross-reference ordering codes and package numbers to avoid substitution errors during sourcing.

Selection Notes

Select this component when true data output is required for multiplexing applications. Compare against the DM74S158N if inverted data presentation is preferred to minimize propagation delay. Verify operating temperature ranges and electrical characteristics against system constraints. Consider the bipolar logic series specifications for interface compatibility with existing circuit designs requiring these specific voltage levels.

Part Context

This part belongs to the 74S logic family, characterized by Schottky clamping for high-speed operation. It is functionally related to the DM74S158N, which provides inverted outputs. The device is part of a broader range of data selectors and multiplexers designed for digital signal routing in electronic systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.