INTEGRATED CIRCUITS
74ALS151
8-input multiplexer
Product specification
IC05 Data Handbook
1991 Feb 08
Philips
Semiconductors
Philips Semiconductors
Product specification
8-input multiplexer
74ALS151
FEATURES
•
8-to-1 multiplexing
•
On chip decoding
•
Multi-function capability
•
Complementary outputs
•
See 74ALS251 for 3-State version
DESCRIPTION
The 74ALS151 is a logic implementation of a single 8-position
switch with the switch position controlled by the state of three select
(S0, S1, S2) inputs. True (Y) and complementary (Y) outputs are
both provided.
The enable (E) is active-Low. When E is High, Y output is Low and
the Y output is High regardless of all other inputs.
PIN CONFIGURATION
I3
I2
I1
I0
Y
Y
E
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
I4
I5
I6
I7
S0
S1
S2
SF00742
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
74ALS151N
74ALS151D
DRAWING
NUMBER
TYPE
TYPICAL
PROPAGATION DELAY
8.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
8.0mA
16-pin plastic DIP
74ALS151
16-pin plastic SO
SOT38-4
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
I0 – I7
S0 – S2
E
Y, Y
Data inputs
Select inputs
Enable input (active-Low)
Data outputs
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
1.0/1.0
1.0/1.0
1.0/1.0
130/240
LOAD VALUE
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
2.6mA/24mA
NOTE:
One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
4
3
2
1
15
14
13
12
IEC/IEEE SYMBOL
7
11
10
I0
I1
I2
I3
I4
I5
I6
I7
9
4
3
2
1
2
6
0
G
0
7
5
MUX
EN
11
10
9
7
S0
S1
S2
E
Y
Y
15
14
13
V
CC
= Pin 16
GND = Pin 8
5
6
12
SF00743
SF00744
1991 Feb 08
2
853–1022 01670
Philips Semiconductors
Product specification
8-input multiplexer
74ALS151
LOGIC DIAGRAM
I0
4
S2
9
I1
3
I2
2
I3
1
I4
15
I5
14
I6
13
I7
12
S1
10
S0
11
E
7
5
V
CC
= Pin 16
GND = Pin 8
Y
Y
6
SF00741
FUNCTION TABLE
INPUTS
S2
X
L
L
L
L
H
H
H
H
S1
X
L
L
H
H
L
L
H
H
S0
X
L
H
L
H
L
H
L
H
E
H
L
L
L
L
L
L
L
L
OUTPUTS
Y
L
I0
I1
I2
I3
I4
I5
I6
I7
Y
H
I0
I1
I2
I3
I4
I5
I6
I7
H = High voltage level
L = Low voltage level
X = Don’t care
1991 Feb 08
3
Philips Semiconductors
Product specification
8-input multiplexer
74ALS151
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature range
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to V
CC
48
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
MIN
V
CC
V
IH
V
IL
I
Ik
I
OH
I
OL
T
amb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free air temperature range
0
4.5
2.0
0.8
–18
–2.6
24
+70
LIMITS
NOM
5.0
MAX
5.5
V
V
V
mA
mA
mA
°C
UNIT
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
MIN
V
O
OH
High-level
High level output voltage
V
CC
=
±10%,
V
IL
= MAX,
,
,
V
IH
= MIN
V
CC
= MIN, V
IL
= MAX,
,
,
V
IH
= MIN
V
CC
= MIN, I
I
= I
IK
V
CC
= MAX, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.4V
V
CC
= MAX, V
O
= 2.25V
V
CC
= MAX
–30
8.0
I
OH
= –0.4mA
I
OH
= MAX
I
OL
= 12mA
I
OL
= 24mA
V
CC
– 2
2.4
3.2
0.25
0.35
–0.73
0.40
0.50
–1.5
0.1
20
–0.1
–112
12
LIMITS
TYP
2
UNIT
MAX
V
V
V
V
V
mA
µA
mA
mA
mA
V
O
OL
V
IK
I
I
I
IH
I
IL
I
O
I
CC
Low-level
Low level output voltage
Input clamp voltage
Input current at minimum input voltage
High-level input current
Low-level input current
Output current
3
Supply current (total)
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
1991 Feb 08
4
Philips Semiconductors
Product specification
8-input multiplexer
74ALS151
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
T
amb
= 0°C to +70°C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500Ω
MIN
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
Propagation delay
In to Y
Propagation delay
In to Y
Propagation delay
Sn to Y
Propagation delay
Sn to Y
Propagation delay
E to Y
Propagation delay
E to Y
Waveform 1
Waveform 2
Waveform 1, 2
Waveform 1, 2
Waveform 1
Waveform 1
3.0
5.0
3.0
5.0
5.0
7.0
5.0
5.0
4.0
4.0
4.0
5.0
MAX
12.0
12.0
15.0
15.0
15.0
16.0
15.0
16.0
12.0
12.0
12.0
14.0
ns
ns
ns
ns
ns
ns
UNIT
AC WAVEFORMS
For all waveforms, V
M
= 1.3V.
V
IN
V
IN
V
M
t
PHL
V
M
t
PLH
V
M
t
PLH
V
M
t
PHL
V
OUT
V
M
V
M
V
OUT
V
M
V
M
SF00093
SF00092
Waveform 1. Propagation Delay for Inverting Output
Waveform 2. Propagation Delay for Non-inverting Output
TEST CIRCUIT AND WAVEFORMS
V
CC
NEGATIVE
PULSE
V
IN
PULSE
GENERATOR
R
T
D.U.T.
V
OUT
90%
V
M
10%
t
THL (
t
f
f
)
C
L
R
L
t
w
V
M
10%
t
TLH (
t
r
)
0.3V
90%
AMP (V)
t
TLH (
t
r
)
90%
t
THL (
t
f
)
AMP (V)
90%
V
M
t
w
10%
0.3V
Test Circuit for Totem-pole Outputs
POSITIVE
PULSE
10%
V
M
DEFINITIONS:
R
L
= Load resistor;
see AC electrical characteristics for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
Input Pulse Definition
INPUT PULSE REQUIREMENTS
Family
Amplitude V
M
74ALS
3.5V
1.3V
Rep.Rate
1MHz
t
w
500ns
t
TLH
2.0ns
t
THL
2.0ns
SC00005
1991 Feb 08
5
嵌入式系统
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