TECHNICAL DATA
176
1-of-16 Decoder/Demultiplexer
High-Performance Silicon-Gate CMOS
The IN74HC154 is identical in pinout to the LS/ALS154. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALSTTL outputs.
This device, when enabled, selects one of 16 active-low outputs.
Two active-low Chip Selects are provided to facilitate the chip-
select, demultiplexing, and cascading functions. When either Chip
Select is high, all outputs are high. The demultiplexing function is
accomplished by using the Address inputs to select the desired device
output.
The IN74HC154 is primarily used for memory address decoding
and data routing applications.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
A
High Noise Immunity Characteristic of CMOS Devices
IN74HC154
ORDERING INFORMATION
IN74HC154N Plastic
IN74HC154DW SOIC
T
A
= -55
to 125
C for all
packages
LOGIC DIAGRAM
PIN 24 =V
CC
PIN 12 = GND
PIN ASSIGNMENT
IN74HC154
177
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
V
CC
DC Supply Voltage (Referenced to GND)
-0.5 to +7.0
V
V
IN
DC Input Voltage (Referenced to GND)
-1.5 to V
CC
+1.5
V
V
OUT
DC Output Voltage (Referenced to GND)
-0.5 to V
CC
+0.5
V
I
IN
DC Input Current, per Pin
20
mA
I
OUT
DC Output Current, per Pin
25
mA
I
CC
DC Supply Current, V
CC
and GND Pins
50
mA
P
D
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
750
500
mW
Tstg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
260
C
*
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/
C from 65
to 125
C
SOIC Package: : - 7 mW/
C from 65
to 125
C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
CC
DC Supply Voltage (Referenced to GND)
2.0
6.0
V
V
IN
, V
OUT
DC Input Voltage, Output Voltage (Referenced to GND)
0
V
CC
V
T
A
Operating Temperature, All Package Types
-55
+125
C
t
r
, t
f
Input Rise and Fall Time (Figure 1)
V
CC
=2.0 V
V
CC
=4.5 V
V
CC
=6.0 V
0
0
0
1000
500
400
ns
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range
GND
(V
IN
or V
OUT
)
V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
).
Unused outputs must be left open.
IN74HC154
178
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
V
CC
Guaranteed Limit
Symbol
Parameter
Test Conditions
V
25
C
to
-55
C
85
C
125
C
Unit
V
IH
Minimum High-Level
Input Voltage
V
OUT
=0.1 V or V
CC
-0.1 V
I
OUT
20
A
2.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
IL
Maximum Low -
Level Input Voltage
V
OUT
=0.1 V or V
CC
-0.1 V
I
OUT
20
A
2.0
4.5
6.0
0.3
0.9
1.2
0.3
0.9
1.2
0.3
0.9
1.2
V
V
OH
Minimum High-Level
Output Voltage
V
IN
=V
IH
or V
IL
I
OUT
20
A
2.0
4.5
6.0
1.9
4.4
5.9
1.9
4.4
5.9
1.9
4.4
5.9
V
V
IN
=V
IH
or V
IL
I
OUT
4.0 mA
I
OUT
5.2 mA
4.5
6.0
3.98
5.48
3.84
5.34
3.7
5.2
V
OL
Maximum Low-Level
Output Voltage
V
IN
=V
IH
or V
IL
I
OUT
20
A
2.0
4.5
6.0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
V
V
IN
=V
IH
or V
IL
I
OUT
4.0 mA
I
OUT
.5.2 mA
4.5
6.0
0.26
0.26
0.33
0.33
0.4
0.4
I
IN
Maximum Input
Leakage Current
V
IN
=V
CC
or GND
6.0
0.1
1.0
1.0
A
I
CC
Maximum Quiescent
Supply Current
(per Package)
V
IN
=V
CC
or GND
I
OUT
=0
A
6.0
8.0
80
160
A
IN74HC154
179
AC ELECTRICAL CHARACTERISTICS
(C
L
=50pF,Input t
r
=t
f
=6.0 ns)
V
CC
Guaranteed Limit
Symbol
Parameter
V
25
C to
-55
C
85
C
125
C
Unit
t
PLH
, t
PHL
Maximum Propagation Delay, Input A to
Output Y (Figures 1and 3)
2.0
4.5
6.0
190
38
32
240
48
41
285
57
48
ns
t
PLH
, t
PHL
Maximum Propagation Delay , CS to
Output Y (Figures 2 and 3)
2.0
4.5
6.0
175
35
30
220
44
37
265
53
45
ns
t
TLH
, t
THL
Maximum Output Transition Time, Any Output
(Figures 2 and 3)
2.0
4.5
6.0
75
15
13
95
19
16
110
22
19
ns
C
IN
Maximum Input Capacitance
-
10
10
10
pF
Power Dissipation Capacitance (Per Package)
Typical @25
C,V
CC
=5.0 V
C
PD
Used to determine the no-load dynamic power
consumption: P
D
=C
PD
V
CC
2
f+I
CC
V
CC
80
pF
FUNCTION TABLE
Inputs
Outputs
CS1 CS2 A3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 Y11 Y12 Y13 Y14 Y15
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
H
L
L
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
L
L
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
L
H
L
L
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
L
L
H
L
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
L
H
H
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
L
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X = Don't Care
IN74HC154
180
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Figure 3. Test Circuit
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