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8-Input Data Selector/Multiplexer
High-Speed Silicon-Gate CMOS
The IN74AC151 is identical in pinout to the LS/ALS151,
HC/HCT151. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS
outputs.
The device selects one of the eight binary Data Inputs, as
determined by the Address Inputs. The Strobe pin must be at a low
level for the selected data to appear at the outputs. If Strobe is high,
the Y output is forced to a low level and the Y output is forced 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 µA; 0.1 µA @ 25°C
•
High Noise Immunity Characteristic of CMOS Devices
•
Outputs Source/Sink 24 mA
TECHNICAL DATA
IN74AC151
ORDERING INFORMATION
IN74AC151N Plastic
IN74AC151D SOIC
TA = -40° to 85° C for all
packages
LOGIC DIAGRAM
PIN 16 =V
PIN 8 = GND
CC
PIN ASSIGNMENT
FUNCTION TABLE
Inputs Outputs
A2 A1 A0 Strobe Y Y
XX X H L H
L L L L D0 D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
H L H L D5 D5
H H L L D6 D6
H H H L D7 D7
D0,D1...D7=the level of the respective D
input
X = don’t care
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IN74AC151
MAXIMUM RATINGS
*
Symbol Parameter Value Unit
V
CC
V
V
OUT
I
IN
I
OUT
I
CC
P
DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V
DC Input Voltage (Referenced to GND) -0.5 to VCC +0.5 V
IN
DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP+
D
SOIC Package+
±
20
±
50
±
50
750
500
Tstg Storage Temperature -65 to +150
T
Lead Temperature, 1 mm from Case for 10 Seconds
L
260
(Plastic DIP or SOIC Package)
*
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
mA
mA
mA
mW
°
C
°
C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
V
CC
VIN, V
T
J
T
A
I
OH
I
OL
tr, t
f
*
V
from 30% to 70% V
IN
This device c ontains p rote ction ci rcuitr y to guard a gainst damage d ue to high st atic voltages or electr ic
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
GND≤(V
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
Unused outputs must be left open.
DC Supply Voltage (Referenced to GND) 2.0 6.0 V
DC Input Voltage, Output Voltage (Referenced to GND) 0 V
OUT
Junction Temperature (PDIP) 140
Operating Temperature, All Package Types -40 +85
Output Current - High -24 mA
Output Current - Low 24 mA
Input Rise and Fall Time
(except Schmitt Inputs)
IN
or V
OUT
)≤VCC.
CC
*
V
V
V
=3.0 V
CC
=4.5 V
CC
=5.5 V
CC
and V
IN
0
0
0
should be constrained to the range
OUT
150
40
25
CC
V
°
C
°
C
ns/V
CC
).
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IN74AC151
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
Symbol Parameter Test Conditions V
V
Minimum High-Level
IH
V
=0.1 V or VCC-0.1 V 3.0
OUT
Input Voltage
V
Maximum Low -
IL
V
=0.1 V or VCC-0.1 V 3.0
OUT
Level Input Voltage
V
OH
Minimum High-Level
I
OUT
≤ -50 µA
Output Voltage
*
VIN=VIH or V
IL
IOH=-12 mA
I
=-24 mA
OH
I
=-24 mA
OH
V
OL
Maximum Low-Level
I
OUT
≤ 50 µA
Output Voltage
*
VIN= VIH or V
IL
IOL=12 mA
I
=24 mA
OL
I
=24 mA
OL
I
IN
Maximum Input
VIN=VCC or GND 5.5
Leakage Current
I
OLD
+Minimum Dynamic
V
=1.65 V Max 5.5 75 mA
OLD
Output Current
I
OHD
+Minimum Dynamic
V
=3.85 V Min 5.5 -75 mA
OHD
Output Current
I
CC
Maximum Quiescent
VIN=VCC or GND 5.5 8.0 80
Supply Current
(per Package)
*
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
Note: I
IN
and I
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
V
4.5
5.5
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
CC
Guaranteed Limits
25 °C-40
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±
0.1
°
C to
85°C
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±
1.0
CC
Unit
V
V
V
V
µ
A
µ
A
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IN74AC151
AC ELECTRICAL CHARACTERISTICS
(CL=50pF,Input tr=tf=3.0 ns)
Symbol Parameter V
t
PLH
Propagation Delay, Input A to
Output Y or Y (Figure 2)
t
PHL
Propagation Delay, Input A to
Output Y or Y (Figure 2)
t
PLH
Propagation Delay, Strobe to
Output Y or Y (Figures 4,5)
t
PHL
Propagation Delay, Strobe to
Output Y or Y (Figures 4,5)
t
PLH
Propagation Delay, Input D to
Output Y or Y (Figures 1,3)
t
PHL
Propagation Delay, Input D to
Output Y or Y (Figures 1,3)
C
IN
C
PD
*
Voltage Range 3.3 V is 3.3 V ±0.3 V
Maximum Input Capacitance 5.0 4.5 4 .5 pF
Power Dissipation Capacitance 70 pF
Voltage Range 5.0 V is 5.0 V ±0.5 V
*
V
CC
Guaranteed Limits
25 °C-40
Min Max Min Max
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.0
2.5
2.5
2.0
2.5
2.0
1.5
1.5
2.5
1.5
2.5
1.5
18.0
13.0
18.0
13.0
13.0
10.0
13.0
10.0
14.0
10.5
15.0
11.0
Typical @25°C,VCC=5.0 V
3.0
2.0
2.5
1.5
2.0
1.5
1.5
1.5
2.0
1.5
2.0
1.5
°
C to
85°C
20.0
15.0
20.0
15.0
14.0
11.0
14.0
11.0
15.5
11.0
16.0
12.0
Unit
ns
ns
ns
ns
ns
ns
176
Figure 1. Switching Waveforms Figure 2. Switching Waveforms
Figure 3. Switching Waveforms Figure 4. Switching Waveforms
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Figure 5. Switching Waveforms
IN74AC151
EXPANDED LOGIC DIAGRAM
177
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