National Semiconductor DM54157 DM74157 Quad 2-Line to 1-Line Data Selectors Multiplexers Data Manual
Summary
This Quad 2-Line to 1-Line Data Selector IC is a core component for digital circuit design, engineered to efficiently multiplex and route two input data signals onto one selectable output line. The technical manual provides comprehensive specifications, covering electrical characteristics, precise timing parameters (such as propagation delay), and various application guidelines. This device is essential for electronics engineers and hardware developers needing reliable signal selection, data bus multiplexing, or logical input point expansion in their digital systems.
Page 1 Text Content
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54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers General Description Features
These data selectors/multiplexers contain inverters and Buffered inputs and outputs
drivers to supply full on-chip data selection to the four out- Typical propagation time ns put gates. separate strobe input is provided. 4-bit word Typical power dissipation m W is selected from one of two sources and is routed to the four Alternate Military/Aerospace device (54157) is avail- outputs. able. Contact National Semiconductor Sales Office/
Distributor for specifications.
Applications Expand any data input point Multiplex dual data buses Generate four functions of two variables (one variable is common) Source programmable counters
Connection Diagram
Dual-In-Line Package
TL/F/6550–1
Order Number 54157DMQB, 54157FMQB, DM54157J, DM54157W or DM74157N
See NS Package Number J16A, N16E or W16A
Function Table
Inputs
Output
Strobe Select
High Level, Low Level, Don’t Care
C1995 National Semiconductor Corporation TL/F/6550 RRD-B30M105/Printed in U. S. A.
Page Summary Contents For National Semiconductor DM54157 DM74157 Quad 2-Line to 1-Line Data Selectors Multiplexers Data Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 6 |
| File Size | 118.89 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the maximum typical output current for this device?
The low level output current (OL) is rated at 16 mA.
Can this device expand data inputs or multiplex buses?
Yes, applications include expanding any data input point and multiplexing dual data buses.
What is the operating temperature range for the DM74157 model?
The recommended free air operating temperature range for DM74157 is 0°C to 70°C.
Are these components suitable for use in life support systems?
No, National Semiconductor products are not authorized for use as critical components in life support devices without express written approval.