IN74HC158A
1
Q
UAD
2-I
NPUT
D
ATA
S
ELECTORS
/M
ULTIPLEXERS
High-Performance Silicon-Gate CMOS
The IN74HC158A is identical in pinout to the LS/ALS158. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALSTTL outputs.
This device routes 2 nibbles (A or B) to a single port (Y) as
determined by the Select input. The data is presented at the
outputs in invertered form. A high level on the Output Enable input
sets all four Y outputs to a high level.
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
ORDERING INFORMATION
IN74HC158AN Plastic
IN74HC158AD SOIC
T
A
= -55
to 125 C for all
packages
FUNCTION TABLE
Inputs Outputs
Output
Enable
Select Y0-Y3
H X
H
L L
3
0 A
A
-
L H
3
0 B
B
-
X=don't care
A0-A3,B0-B3=the levels of the
respective Data-Word Inputs
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
PIN ASSIGNMENT
IN74HC158A
2
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 125C
SOIC Package: : - 7 mW/
C from 65 to 125C
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.
IN74HC158A
4
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
85C 125
C
Unit
t
PLH
,
t
PHL
Maximum Propagation Delay, Input A or
B to
Output Y (Figures 1and 4)
2.0
4.5
6.0
105
21
18
130
26
22
160
32
27
ns
t
PLH
,
t
PHL
Maximum Propagation Delay , Select to
Output Y (Figures 2 and 4)
2.0
4.5
6.0
110
22
19
140
28
24
165
33
28
ns
t
PLH
,
t
PHL
Maximum Propagation Delay , Output
Enable to Output Y (Figures 3 and 4)
2.0
4.5
6.0
100
20
17
125
25
21
150
30
26
ns
t
TLH
, t
THL
Maximum Output Transition Time, Any
Output (Figures 1 and 4)
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
33 pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Figure 3. Switching Waveforms
Figure 4. Test Circuit
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