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DM74AS158N 데이터시트 PDF




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부품번호 DM74AS158N 기능
기능 Quad 1 of 2 Line Data Selector/Multiplexer
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DM74AS158N 데이터시트, 핀배열, 회로
April 1984
Revised March 2000
DM74AS157 • DM74AS158
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 AS157 presents true data whereas
the AS158 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,
low power Schottky, and advanced low power Schottky
TTL counterpart
s Improved AC performance over Schottky, low power
Schottky, and advanced low power Schottky counter-
parts
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
DM74AS157M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74AS157SJX
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74AS157N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74AS158M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74AS158N
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
HX
LL
LL
LH
LH
H = HIGH Level
L = LOW Level
X = Don't Care
A
X
L
H
X
X
Output Y
B DM74AS157 DM74AS158
XL
H
XL
H
XH
L
LL
H
HH
L
© 2000 Fairchild Semiconductor Corporation DS006290
www.fairchildsemi.com




DM74AS158N pdf, 반도체, 판매, 대치품
DM74AS157 Switching Characteristics
over recommended operating free air temperature range
Symbol
Parameter
Conditions
tPLH Propagation Delay Time,
VCC = 4.5V to 5.5V,
LOW-to-HIGH Level Output
CL = 50 pF,
tPHL Propagation Delay Time,
RL = 500
HIGH-to-LOW Level Output
tPLH Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL Propagation Delay Time,
HIGH-to-LOW Level Output
tPLH Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL Propagation Delay Time,
HIGH-to-LOW Level Output
DM74AS158 Switching Characteristics
over recommended operating free air temperature range
Symbol
Parameter
Conditions
tPLH Propagation Delay Time,
VCC = 4.5V to 5.5V,
LOW-to-HIGH Level Output
CL = 50 pF,
tPHL Propagation Delay Time,
RL = 500
HIGH-to-LOW Level Output
tPLH Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL Propagation Delay Time,
HIGH-to-LOW Level Output
tPLH Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL Propagation Delay Time,
HIGH-to-LOW Level Output
From
(Input)
Data
To
(Output)
Y
Data
Y
STROBE
Y
STROBE
Y
Select
Select
Y
Y
From
(Input)
Data
To
(Output)
Y
Data
Y
STROBE
Y
STROBE
Select
Y
Y
Select
Y
Min
1
1
2
2
2
2
Min
1
1
2
2
2
2
Max
6
5.5
10.5
7.5
11
10
Units
ns
ns
ns
ns
ns
ns
Max
5
4.5
6.5
10
9.5
10.5
Units
ns
ns
ns
ns
ns
ns
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DM74AS158N 전자부품, 판매, 대치품
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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관련 데이터시트

부품번호상세설명 및 기능제조사
DM74AS158M

Quad 1 of 2 Line Data Selector/Multiplexer

Fairchild Semiconductor
Fairchild Semiconductor
DM74AS158N

Quad 1 of 2 Line Data Selector/Multiplexer

Fairchild Semiconductor
Fairchild Semiconductor

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