Fairchild DM74S158 Quad 1 of 2 line data selector/multiplexer Datasheet

Revised April 2000
DM74S157 • DM74S158
Quad 1 of 2 Line Data Selector/Multiplexer
General Description
Applications
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 DM74S157 presents true data whereas
the DM74S158 presents inverted data to minimize propagation delay time.
• Expand any data input point
• Multiplex dual data buses
• Generate four functions of two variables (one variable is
common)
• Source programmable counters
Features
■ Buffered inputs and outputs
■ Typical propagation time
DM74S157
5 ns
DM74S158
4 ns
■ Typical power dissipation
DM74S157
250 mW
DM74S158
195 mW
Ordering Code:
Order Number
Package Number
Package Description
DM74S157N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74S158N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagrams
DM74S157
© 2000 Fairchild Semiconductor Corporation
DM74S158
DS006470
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DM74S157 • DM74S158 Quad 1 of 2 Line Data Selector/Multiplexer
August 1986
DM74S157 • DM74S158
Function Table
Inputs
Output Y
Strobe
Select
A
B
H
X
X
X
L
H
L
L
L
X
L
H
L
L
H
X
H
L
L
H
X
L
L
H
L
H
X
H
H
L
H = HIGH Level
L = LOW Level
X = Don’t Care
Logic Diagrams
DM74S157
DM74S158
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2
DM74S157 DM74S158
Supply Voltage
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
7V
Input Voltage
5.5V
0°C to +70°C
Operating Free Air Temperature Range
−65°C to +150°C
Storage Temperature Range
DM74157 Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
4.75
5
5.25
Units
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−1
mA
IOL
LOW Level Output Current
20
mA
TA
Free Air Operating Temperature
70
°C
V
2
V
0
DM74S157 Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
VOH
HIGH Level
VCC = Min, IOH = Max
Output Voltage
VIL = Max, VIH = Min
VOL
LOW Level
VCC = Min, IOL = Max
Output Voltage
VIH = Min, VIL = Max
Min
Typ
(Note 2)
Max
−1.2
2.7
3.4
0.5
V
1
mA
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V
IIH
HIGH Level
VCC = Max
S or G
100
Input Current
VI = 2.7V
A or B
50
HIGH Level
VCC = Max
S or G
−4
Input Current
VI = 0.5V
A or B
−2
IOS
Short Circuit Output Current
VCC = Max (Note 3)
ICC
Supply Current
VCC = Max (Note 4)
−40
V
V
II
IIL
Units
µA
mA
−100
mA
78
mA
50
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: ICC is measured 4.5V applied to all inputs and all outputs OPEN.
DM74S157 Switching Characteristics
at VCC = 5V and TA = 25°C
RL = 280Ω
Symbol
Parameter
CL = 15 pF
From (Input)
To (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
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
Min
Max
CL = 50 pF
Min
Units
Max
Data to Y
7.5
10
ns
Data to Y
6.5
10
ns
Strobe to Y
12.5
15
ns
Strobe to Y
12
15
ns
Select to Y
15
17
ns
Select to Y
15
17
ns
3
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DM74S157 • DM74S158
Absolute Maximum Ratings(Note 1)
DM74S157 • DM74S158
DM74S158 Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
4.75
5
5.25
Units
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
−1
mA
IOL
LOW Level Output Current
20
mA
TA
Free Air Operating Temperature
70
°C
V
2
V
0
DM74S158 Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC = Min, II = − 18 mA
VOH
HIGH Level
VCC = Min, IOH = Max
VOL
Output Voltage
VIL = Max, VIH = Min
LOW Level
VCC = Min, IOL = Max
Output Voltage
VIH = Min, VIL = Max
Min
Typ
(Note 5)
Max
−1.2
2.7
3.4
0.5
V
1
mA
II
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V
HIGH Level
VCC = Max
S or G
100
Input Current
VI = 2.7V
A or B
50
LOW Level
VCC = Max
S or G
−4
Input Current
VI = 0.5V
A or B
−2
IOS
Short Circuit Output Current
VCC = Max (Note 6)
ICC1
Supply Current
VCC = Max (Note 7)
ICC2
Supply Current
VCC = Max (Note 8)
−40
39
V
V
IIH
IIL
Units
µA
mA
−100
mA
61
mA
81
mA
Note 5: All typicals are at VCC = 5V, TA = 25°C.
Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 7: ICC1 is measured with all outputs OPEN and all inputs at 4.5V.
Note 8: ICC2 is measured with B, G, and S inputs grounded, A inputs at 4.5V, and all outputs OPEN.
DM74S158 Switching Characteristics
at VCC = 5V and TA = 25 °C
RL = 280Ω
Symbol
Parameter
CL = 15 pF
From (Input)
To (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
tPLH
Propagation Delay Time
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
HIGH-to-LOW Level Output
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Min
CL = 50 pF
Max
Min
Units
Max
Data to Y
6
9
ns
Data to Y
6
9
ns
Strobe to Y
11.5
12
ns
Strobe to Y
12
14
ns
Select to Y
12
15
ns
Select to Y
12
15
ns
4
DM74S157 • DM74S158 Quad 1 of 2 Line Data Selector/Multiplexer
Physical Dimensions inches (millimeters) unless otherwise noted
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.
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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:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
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1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
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to perform when properly used in accordance with
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user.
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5
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