Philips 74als151 DATASHEETS
INTEGRATED CIRCUITS
74ALS151
8-input multiplexer
Product specification 1991 Feb 08
IC05 Data Handbook
Philips Semiconductors Product specification
74ALS1518-input multiplexer
FEA TURES
PIN CONFIGURATION
•8-to-1 multiplexing
1
•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
both provided.
The enable (E
the Y
output is High regardless of all other inputs.
TYPE
) is active-Low. When E is High, Y output is Low and
TYPICAL
PROPAGATION DELAY
74ALS151 8.0ns 8.0mA
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
I0 – I7 Data inputs 1.0/1.0 20µA/0.1mA
S0 – S2 Select inputs 1.0/1.0 20µA/0.1mA
E Enable input (active-Low) 1.0/1.0 20µA/0.1mA
Y, Y Data outputs 130/240 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.
) outputs are
TYPICAL
SUPPLY CURRENT
(TOTAL)
ORDERING INFORMA TION
DESCRIPTION COMMERCIAL RANGE
16-pin plastic DIP 74ALS151N SOT38-4
16-pin plastic SO 74ALS151D SOT109-1
I3
2
I2
I1
3
I0
4
Y
5
6
Y
E
74ALS (U.L.)
HIGH/LOW
ORDER CODE
V
= 5V ±10%,
CC
T
= 0°C to +70°C
amb
16
V
CC
15
I4
14
I5
13
I6
12
I7
11
S0
107
S1
98GND S2
LOAD VALUE
HIGH/LOW
SF00742
DRAWING
NUMBER
LOGIC SYMBOL
4 12131415
I0 I1 I2 I3 I4 I5 I6 I7
11
10
V
= Pin 16
CC
GND = Pin 8
9
7
S0
S1
S2
E
1991 Feb 08 853–1022 01670
123
YY
65
SF00743
IEC/IEEE SYMBOL
2
7
11
10
9
4
3
2
1
15
14
13
12
EN
MUX
0
0
G
7
2
5
6
SF00744
Philips Semiconductors Product specification
74ALS1518-input multiplexer
LOGIC DIAGRAM
I0 I1 I2 I3 I4 I5 I6 I7
9
S2
10
S1
11
S0
7
E
4 3 2 1 15 14 13 12
= Pin 16
V
CC
GND = Pin 8
FUNCTION TABLE
INPUTS OUTPUTS
S2 S1 S0 E Y Y
X X X H L H
L L L L I0 I0
L L H L I1 I1
L H L L I2 I2
L H H L I3 I3
H L L L I4 I4
H L H L I5 I5
H H L L I6 I6
H H H L I7 I7
H = High voltage level
L = Low voltage level
X = Don’t care
56
YY
SF00741
1991 Feb 08
3
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