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National Semiconductor Electronic Components Datasheet


74154

4-Line to 16-Line Decoders/Demultiplexers



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74154 pdf
June 1989
54154 DM54154 DM74154
4-Line to 16-Line Decoders Demultiplexers
General Description
Each or these 4-line-to-16-line decoders utilizes TTL circuit-
ry to decode four binary-coded inputs into one of sixteen
mutually exclusive outputs when both the strobe inputs G1
and G2 are low The demultiplexing function is performed
by using the 4 input lines to address the output line passing
data from one of the strobe inputs with the other strobe
input low When either strobe input is high all outputs are
high These demultiplexers are ideally suited for implement-
ing high-performance memory decoders All inputs are buff-
ered and input clamping diodes are provided to minimize
transmission-line effects and thereby simplify system de-
sign
Features
Y Decodes 4 binary-coded inputs into one of 16 mutually
exclusive outputs
Y Performs the demultiplexing function by distributing data
from one input line to any one of 16 outputs
Y Input clamping diodes simplify system design
Y High fan-out low-impedance totem-pole outputs
Y Typical propagation delay
3 levels of logic 19 ns
Strobe 18 ns
Y Typical power dissipation 170 mW
Y Alternate Military Aerospace device (54154) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6548 – 1
Order Number 54154DMQB 54154FMQB DM54154J or DM74154N
See NS Package Number J24A N24A or W24C
C1995 National Semiconductor Corporation TL F 6548
RRD-B30M105 Printed in U S A



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74154 pdf
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
5 5V
Operating Free Air Temperature Range
DM54 and 54
b55 C to a125 C
DM74
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Free Air Operating Temperature
DM54154
Min Nom
45 5
2
b55
Max
55
08
b0 8
16
125
Min
4 75
2
0
DM74154
Nom
5
Max
5 25
08
b0 8
16
70
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max
VCC e Max VI e 5 5V
IIH
High Level Input Current
VCC e Max VI e 2 4V
IIL
Low Level Input Current
VCC e Max VI e 0 4V
IOS Short Circuit
Output Current
VCC e Max
(Note 2)
DM54
DM74
ICC Supply Current
VCC e Max
(Note 3)
DM54
DM74
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time
Note 3 ICC is measured with all outputs open and all inputs grounded
Min
24
b20
b18
Typ
(Note 1)
32
0 25
34
34
Max
b1 5
04
1
40
b1 6
b55
b57
49
56
Units
V
V
V
mA
mA
mA
mA
mA
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
To (Output)
RL e 400X CL e 15 pF
Min Max
Units
tPLH
Propagation Delay Time
Low to High Level Output
Data to
Output
36 ns
tPHL
Propagation Delay Time
High to Low Level Output
Data to
Output
33 ns
tPLH
Propagation Delay Time
Low to High Level Output
Strobe to
Output
30 ns
tPHL
Propagation Delay Time
High to Low Level Output
Strobe to
Output
27 ns
2



Part Number 74154
Description 4-Line to 16-Line Decoders/Demultiplexers
Maker National Semiconductor - National Semiconductor
Total Page 6 Pages
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