74LCX157M Fairchild Semiconductor, 74LCX157M Datasheet - Page 2
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74LCX157M
Manufacturer Part Number
74LCX157M
Description
MULTIPLEXER QUAD 2IN LV 16SOIC
Manufacturer
Fairchild Semiconductor
Series
74LCXr
Type
Multiplexerr
Datasheet
1.74LCX157MTCX.pdf
(9 pages)
Specifications of 74LCX157M
Circuit
4 x 2:1
Independent Circuits
1
Current - Output High, Low
24mA, 24mA
Voltage Supply Source
Single Supply
Voltage - Supply
2 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Logic Type
Multiplexer
No. Of Channels
4
Ratio
2
Supply Voltage Range
2V To 3.6V
Logic Case Style
SOIC
No. Of Pins
16
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
Filter Terminals
SMD
Family Type
LCX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74LCX157MTC
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Company:
Part Number:
74LCX157MTCX
Manufacturer:
FAIRCHIL
Quantity:
2 185
Part Number:
74LCX157MTCX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
74LCX157MX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
www.fairchildsemi.com
Functional Description
The LCX157 is a quad 2-input multiplexer. It selects four
bits of data from two sources under the control of a com-
mon Select input (S). The Enable input (E) is active-LOW.
When E is HIGH, all of the outputs (Z) are forced LOW
regardless of all other inputs. The LCX157 is the logic
implementation of a 4-pole, 2-position switch where the
position of the switch is determined by the logic levels sup-
plied to the Select input. The logic equations for the outputs
are shown below:
A common use of the LCX157 is the moving of data from
two groups of registers to four common output busses. The
particular register from which the data comes is determined
by the state of the Select input. A less obvious use is as a
function generator. The LCX157 can generate any four of
the sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Z
Z
Z
Z
a
b
c
d
E • (I
E • (I
E • (I
E • (I
1c
1a
1b
1d
• S
• S
• S
• S
I
I
I
I
0c
0a
0b
0d
• S)
• S)
• S)
• S)
2
Truth Table
H
L
X
LOW Voltage Level
HIGH Voltage Level
Immaterial
E
H
L
L
L
L
S
X
H
H
L
L
Inputs
I
X
X
X
H
L
0
I
X
H
X
X
L
1
Outputs
H
H
Z
L
L
L