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MC74LCX158 Datasheet(PDF) 2 Page - ON Semiconductor

No. de pieza MC74LCX158
Descripción Electrónicos  Low-Voltage CMOS Quad 2-Input Multiplexer
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC74LCX158 Datasheet(HTML) 2 Page - ON Semiconductor

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MC74LCX158
http://onsemi.com
2
Figure 1. Pinout: 16−Lead Plastic Package (Top View)
15
16
14
13
12
11
10
2
1
34567
VCC
9
8
E
A3
B3
Y3
A2
B2
Y2
S
A0
B0
Y0
A1
B1
Y1 GND
PIN NAMES
Pins
Function
An
Source 0 Data Inputs
Bn
Source 1 Data Inputs
E
Enable Input
S
Select Input
Yn
Outputs
TRUTH TABLE
Inputs
Outputs
Output
Enable
Select
Y0−Y3
H
X
H
L
L
A0−A3
L
H
B0−B3
X = Don’t Care
A0−A3, B0−B3 = The levels of the respective
Data−Word Inputs
PIN DESCRIPTIONS
INPUTS
A0−A3 (Pins 2, 5, 11, 14)
Nibble A inputs. The data present on these pins is
transferred to the outputs when the Select input is at a low
level and the Output Enable input is at a low level. The data
is presented to the outputs in inverted form for the LCX158.
B0−B3 (Pins 3, 6, 10, 13)
Nibble B inputs. The data present on these pins is
transferred to the outputs when the Select input is at a high
level and the Output Enable input is at a low level. The data
is presented to the outputs in inverted form for the LCX158.
OUTPUTS
Y0−Y3 (Pins 4, 7, 9, 12)
Data outputs. The selected input nibble is presented at
these outputs when the Output Enable input is at a low level.
The data present on these pins is in its inverted form for the
LCX158. For the Output Enable input at a high level, the
outputs are at a high level for the LCX158.
Select (Pin 1)
Nibble select. This input determines the data word to be
transferred to the outputs. A low level on this input selects
the A inputs and a high level selects the B inputs.
CONTROL INPUTS
Enable (Pin 15)
Output Enable input. A low level on this input allows the
selected data to be presented at the outputs. A high level on
this input sets all of the outputs to a high level for the
LCX158.


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