74ALS151 查看數據表（PDF） - Philips Electronics
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74ALS151 Datasheet PDF : 8 Pages
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Philips Semiconductors
8-input multiplexer
Product specification
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.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS151
8.0ns
8.0mA
PIN CONFIGURATION
I3 1
I2 2
I1 3
I0 4
Y5
Y6
E7
GND 8
16 VCC
15 I4
14 I5
13 I6
12 I7
11 S0
10 S1
9 S2
SF00742
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
16-pin plastic DIP
74ALS151N
16-pin plastic SO
74ALS151D
DRAWING
NUMBER
SOT38-4
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
I0 – I7
Data inputs
1.0/1.0
S0 – S2
Select inputs
1.0/1.0
E
Enable input (active-Low)
1.0/1.0
Y, Y
Data outputs
130/240
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
4 3 2 1 15 14 13 12
I0 I1 I2 I3 I4 I5 I6 I7
11
S0
10
S1
9
S2
7
E
YY
VCC = Pin 16
GND = Pin 8
56
SF00743
7
MUX
EN
11
0
10
9
G
0
7
4
2
3
2
1
15
14
13
12
LOAD VALUE
HIGH/LOW
20µA/0.1mA
20µA/0.1mA
20µA/0.1mA
2.6mA/24mA
5
6
SF00744
1991 Feb 08
2
853–1022 01670
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