DM74LS157 鈥?DM74LS158 Quad 2-Line to 1-Line Data Selectors/Multiplexers
September 1986
Revised April 2000
DM74LS157 鈥?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
鈥?Expand any data input point
鈥?Multiplex dual data buses
鈥?Generate four functions of two variables
(one variable is common)
鈥?Source programmable counters
Features
s
Buffered inputs and outputs
s
Typical Propagation Time
DM74LS157
DM74LS158
DM74LS157
DM74LS158
9 ns
7 ns
49 mW
24 mW
s
Typical Power Dissipation
Ordering Code:
Order Number
DM74LS157M
DM74LS157SJ
DM74LS157N
DM74LS158M
DM74LS158N
Package Number
M16A
M16D
N16E
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagrams
DM74LS157
DM74LS158
漏 2000 Fairchild Semiconductor Corporation
DS006396
www.fairchildsemi.com
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