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DM74LS157N

  

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National-Semiconductor
National ->Texas Instruments
DM74LS157N Quad 2-Line to 1-Line Data Selectors/Multiplexers

General Description
These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The LS157 presents true data whereas the LS158 presents inverted data to minimize propagation delay time.

Features
■ Buffered inputs and outputs
■ Typical Propagation Time
   LS157 9 ns
   LS158 7 ns
■ Typical Power Dissipation
   LS157 49 mW
   LS158 24 mW
■ Alternate Military/Aerospace device (54LS157, 54LS158) is available. Contact a 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

 


other parts : 54LS157  54LS157DMQB  54LS157FMQB  54LS157LMQB  54LS158  54LS158DMQB  54LS158FMQB  54LS158LMQB  DM54LS157  DM54LS157J  
DM74LS157N PDF
Fairchild
Fairchild Semiconductor
DM74LS157N Quad 2-Line to 1-Line Data Selectors/Multiplexers

General Description
These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The DM74LS157 presents true data where as the DM74LS158 presents inverted data to minimize propagation delay time.

Features
■ Buffered inputs and outputs
■ Typical Propagation Time
   DM74LS157 9 ns
   DM74LS158 7 ns
■ Typical Power Dissipation
   DM74LS157 49 mW
   DM74LS158 24 mW

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

 


other parts : DM74LS157  DM74LS157CW  DM74LS157M  DM74LS157MX  DM74LS157SJ  DM74LS157SJX  DM74LS158  DM74LS158CW  DM74LS158MX  DM74LS158N  
DM74LS157N PDF

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