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DM74LS151
1-of-8 Line Data Selector/Multiplexer
DM74LS151 1-of-8 Line Data Selector/Multiplexer
August 1986
Revised March 2000
General Description
This data selector/mul tiplexer contains full on- chip decoding to select the desired data source. The DM74LS151
selects one-of-eight da ta sources. Th e DM74LS151 has a
strobe input which must be at a low logic le vel to enable
these devices. A high level at the stro be forces the W output HIGH, and the Y output LOW.
The DM74LS151 features complementary W and Y outputs.
Features
■ Select one-of-eight data lines
■ Performs parallel-to-serial conversion
■ Permits multiplexing from N lines to one line
■ Also for use as Boolean function generator
■ Typical average propagation delay time data input to
W output 12.5 ns
■ Typical power dissipation 30 mW
Ordering Code:
Order Number Package Number Package Description
DM74LS151M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS151SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS151N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.
Connection Diagram Truth Table
Inputs Outputs
Select Strobe
CBAS
XXXHLH
LLLLD0D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
HLHLD5D5
H H L L D6 D6
HHHLD7D7
H = HIGH Level
L = LOW Level
X = Don't Care
D0, D1...D7 = the level of the respective D input
YW
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Logic Diagrams
DM74LS151
See Address Buffer s
Address Buffers
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Absolute Maximum Ratings(Note 1)
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Note 1: The “Absolute Maximum Ratings ” are those val ues beyond w hich
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 “Recommend ed O peratin g Cond itions” t able w ill defin e the condit ions
for actual device operation.
Recommended Operating Conditions
Symbol Parameter Min Nom Max Units
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage 4.75 5 5.25 V
HIGH Level Input Voltage 2 V
LOW Level In put Voltage 0.8 V
HIGH Level Output Current −0.4 mA
LOW Level Output Current 8 mA
Free Air Oper ating Temperature 0 70 °C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
V
I
V
OH
V
OL
I
I
I
IH
I
IL
I
OS
I
CC
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 exc eed one second.
Note 4: I
Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V
HIGH Level VCC = Min, IOH = Max
Output Voltage VIL = Max, VIH = Min
LOW Level VCC = Min, IOL = Max
Output Voltage VIL = Max, VIH = Min V
Input Current @ Max Input Voltage VCC = Max, VI = 7V 0.1 mA
HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA
LOW Level Input Current VCC = Max, VI = 0.4V −0.4 mA
Short Circuit Output Current VCC = Max (Note 3) −20 −100 mA
Supply Current VCC = Max (Note 4) 6 10 mA
is measured with all out puts OPEN, strobe and data select inputs at 4. 5V, and all other inputs OPEN.
CC
IOL = 4 mA, VCC = Min 0.25 0.4
2.7 3.4 V
Typ
(Note 2)
0.35 0.5
Max Units
DM74LS151
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Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol Parameter
DM74LS151
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation Delay Time Select
LOW-to-HIGH Level Output (4 Levels) to Y
Propagation Delay Time Select
HIGH-to-LOW Level Output (4 Levels) to Y
Propagation Delay Time Select
LOW-to-HIGH Level Output (3 Levels) to W
Propagation Delay Time Select
HIGH-to-LOW Level Output (3 Levels) to W
Propagation Delay Time Strobe
LOW-to-HIGH Level Output to Y
Propagation Delay Time Strobe
HIGH-to-LOW Level Output to Y
Propagation Delay Time Strobe
LOW-to-HIGH Level Output to W
Propagation Delay Time Strobe
HIGH-to-LOW Level Output to W
Propagation Delay Time D0 thru D7
LOW-to-HIGH Level Output to Y
Propagation Delay Time D0 thru D7
HIGH-to-LOW Level Output to Y
Propagation Delay Time D0 thru D7
LOW-to-HIGH Level Output to W
Propagation Delay Time D0 thru D7
HIGH-to-LOW Level Output to W
From (Input)
To (out put)
RL = 2 kΩ
CL = 15 pF CL = 50 pF Units
Min Max Min Max
43 46 ns
30 36 ns
23 25 ns
32 40 ns
42 44 ns
32 40 ns
24 27 ns
30 36 ns
32 35 ns
26 33 ns
21 25 ns
20 27 ns
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Physical Dimensions inches (millimeters) unless otherwise noted
DM74LS151
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
Package Number M16A
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
DM74LS151
16-Lead Small Outline Package ( SOP), EIAJ TYPE II, 5.3mm Wide
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Package Number M16D
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
DM74LS151 1-of-8 Line Data Selector/Multiplexer
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent license s 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 provide d in the labe l ing, can be re asonably expected to result in a significant injury to the
user.
Package Number N16E
2. A critical componen t in any com ponen t of a life s upport
device or system whose failu re to perform can b e reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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