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PDF DM74ALS157 Data sheet ( Hoja de datos )
| Número de pieza | DM74ALS157 | |
| Descripción | Quad 1-of-2 Line Data Selector/Multiplexer | |
| Fabricantes | Fairchild Semiconductor | |
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April 1984
Revised February 2000
DM74ALS157 • DM74ALS158
Quad 1-of-2 Line Data Selector/Multiplexer
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 ALS157 presents true data whereas the
ALS158 presents inverted data to minimize propagation
delay time.
Features
s Switching specifications at 50 pF
s Switching specifications guaranteed over full tempera-
ture and VCC range
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s Functionally and pin for pin compatible with Schottky
and low power Schottky TTL counterpart
s Improved AC performance over Schottky and low power
Schottky counterparts
s Expand any data input point
s Multiplex dual data buses
s General four functions of two variables (one variable is
common)
s Source programmable counters
Ordering Code:
Order Number Package Number
Package Description
DM74ALS157M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74ALS157SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS157N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74ALS158N
N16E
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 “X” to the ordering code.
Connection Diagram
Function Table
Inputs
Strobe Select A
H XX
L LL
L LH
L HX
L HX
H = HIGH Level
L = LOW Level
X = Don't Care
Output Y
B DM74ALS157 DM74ALS158
XL
H
XL
H
XH
L
LL
H
HH
L
© 2000 Fairchild Semiconductor Corporation DS006205
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet DM74ALS157.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
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| DM74ALS157 | Quad 1-of-2 Line Data Selector/Multiplexer | Fairchild Semiconductor |
| DM74ALS158 | Quad 1-of-2 Line Data Selector/Multiplexer | Fairchild Semiconductor |
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