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DM74LS157N Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce DM74LS157N
Description  Quad 2-Line to 1-Line Data Selectors/Multiplexers
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74LS157N Fiches technique(HTML) 1 Page - Fairchild Semiconductor

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© 2000 Fairchild Semiconductor Corporation
DS006396
www.fairchildsemi.com
September 1986
Revised April 2000
DM74LS157 • DM74LS158
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 out-
put 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 whereas
the DM74LS158 presents inverted data to minimize propa-
gation delay time.
Applications
• Expand any data input point
• Multiplex dual data buses
• Generate four functions of two variables
(one variable is common)
• Source programmable counters
Features
s Buffered inputs and outputs
s Typical Propagation Time
DM74LS157
9 ns
DM74LS158
7 ns
s Typical Power Dissipation
DM74LS157
49 mW
DM74LS158
24 mW
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
DM74LS157
DM74LS158
Order Number
Package Number
Package Description
DM74LS157M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS157SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS157N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74LS158M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS158N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide


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