Page 1
TL/F/6548
54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers
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 circuitry 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 implementing high-performance memory decoders. All inputs are buffered and input clamping diodes are provided to minimize
transmission-line effects and thereby simplify system design.
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 available. 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
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.
Page 2
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
b
55§Ctoa125§C
DM74 0
§
Ctoa70§C
Storage Temperature Range
b
65§Ctoa150§C
Note:
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’’
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 Parameter
DM54154 DM74154
Units
Min Nom Max Min Nom Max
V
CC
Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
V
IH
High Level Input Voltage 2 2 V
V
IL
Low Level Input Voltage 0.8 0.8 V
I
OH
High Level Output Current
b
0.8
b
0.8 mA
I
OL
Low Level Output Current 16 16 mA
T
A
Free Air Operating Temperature
b
55 125 0 70
§
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
Typ
Max Units
(Note 1)
V
I
Input Clamp Voltage V
CC
e
Min, I
I
eb
12 mA
b
1.5 V
V
OH
High Level Output V
CC
e
Min, I
OH
e
Max
2.4 3.2 V
Voltage V
IL
e
Max, V
IH
e
Min
V
OL
Low Level Output V
CC
e
Min, I
OL
e
Max
0.25 0.4 V
Voltage V
IH
e
Min, V
IL
e
Max
I
I
Input Current@Max V
CC
e
Max, V
I
e
5.5V
1mA
Input Voltage
I
IH
High Level Input Current V
CC
e
Max, V
I
e
2.4V 40 mA
I
IL
Low Level Input Current V
CC
e
Max, V
I
e
0.4V
b
1.6 mA
I
OS
Short Circuit V
CC
e
Max DM54
b
20
b
55
mA
Output Current (Note 2)
DM74
b
18
b
57
I
CC
Supply Current V
CC
e
Max DM54 34 49
mA
(Note 3)
DM74 34 56
Note 1: All typicals are at V
CC
e
5V, T
A
e
25§C.
Note 2: Not more than one output should be shorted at a time.
Note 3: I
CC
is measured with all outputs open and all inputs grounded.
Switching Characteristics at V
CC
e
5V and T
A
e
25§C (See Section 1 for Test Waveforms and Output Load)
Symbol Parameter
From (Input) R
L
e
400X,C
L
e
15 pF
Units
To (Output)
Min Max
t
PLH
Propagation Delay Time Data to
36 ns
Low to High Level Output Output
t
PHL
Propagation Delay Time Data to
33 ns
High to Low Level Output Output
t
PLH
Propagation Delay Time Strobe to
30 ns
Low to High Level Output Output
t
PHL
Propagation Delay Time Strobe to
27 ns
High to Low Level Output Output
2
Page 3
Function Table
Inputs Outputs
G1G2DCBA0123456789101112131415
L L LLLLLHHHHHHHHH HHHHHH
L L L L L HHLHHHHHHHH HHHHHH
L L LLHLHHLHHHHHHH HHHHHH
L L L L HHHHHL HHHHHH HHHHHH
L L L HL L HHHHLHHHHH HHHHHH
L L L HL HHHHHHL HHHH HHHHHH
L L L HHL HHHHHHL HHH HHHHHH
L L L HHHHHHHHHHL HH HHHHHH
L L H L L L HHHHHHHHL H HHHHHH
L L H L L HHHHHHHHHHL HHHHHH
L L HLHLHHHHHHHHHH L HHHHH
L L H LHHHHHHHHHHHH H L HHHH
L L HH L L HHHHHHHHHH H H L H H H
L L HH LHHHHHHHHHHH H H H L H H
L L HHH LHHHHHHHHHH HHHHLH
L L HHHHHHHHHHHHHH HHHHH L
L H XXXXHHHHHHHHHH HHHHHH
H L XXXXHHHHHHHHHH HHHHHH
H H XXXXHHHHHHHHHH HHHHHH
HeHigh Level, LeLow Level, XeDon’t Care
Logic Diagram
TL/F/6548– 2
3
Page 4
4
Page 5
Physical Dimensions inches (millimeters)
24-Lead Ceramic Dual-In-Line Package (J)
Order Number 54154DMQB or DM54154J
NS Package Number J24A
24-Lead Molded Dual-In-Line Package (N)
Order Number DM74154N
NS Package Number N24A
5
Page 6
54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers
Physical Dimensions inches (millimeters) (Continued)
24-Lead Ceramic Flat Package (W)
Order Number 54154FMQB
NS Package Number W24C
LIFE SUPPORT POLICY
NATIONAL’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 NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.
National Semiconductor National Semiconductor National Semiconductor National Semiconductor
Corporation Europe Hong Kong Ltd. Japan Ltd.
1111 West Bardin Road Fax: (
a
49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309
Arlington, TX 76017 Email: [email protected] Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408
Tel: 1(800) 272-9959 Deutsch Tel: (
a
49) 0-180-530 85 85 Tsimshatsui, Kowloon
Fax: 1(800) 737-7018 English Tel: (
a
49) 0-180-532 78 32 Hong Kong
Fran3ais Tel: (
a
49) 0-180-532 93 58 Tel: (852) 2737-1600
Italiano Tel: (
a
49) 0-180-534 16 80 Fax: (852) 2736-9960
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
Loading...