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MC74LCX240 Datasheet(PDF) 2 Page - ON Semiconductor

Part No. MC74LCX240
Description  Low−Voltage CMOS Octal Buffer With 5 V−Tolerant Inputs and Outputs (3−State, Inverting)
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC74LCX240 Datasheet(HTML) 2 Page - ON Semiconductor

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MC74LCX240
http://onsemi.com
2
Figure 1. Pinout: 20−Lead (Top View)
19
20
18
17
16
15
14
2
1
34567
VCC
13
8
12
9
11
10
2OE 1O0
2D0 1O1 2D1 1O2
2D2 1O3
2D3
1OE 1D0 2O0
1D1 2O1 1D2 2O2
1D3 2O3 GND
Figure 2. LOGIC DIAGRAM
1OE
1
1D0
2
1O0
18
1D1
4
1O1
16
1D2
6
1O2
14
1D3
8
1O3
12
2OE
19
2D0
17
2O0
3
2D1
15
2O1
5
2D2
13
2O2
7
2D3
11
2O3
9
PIN NAMES
Function
Output Enable Inputs
Data Inputs
3−State Outputs
Pins
nOE
1Dn, 2Dn
1On, 2On
TRUTH TABLE
INPUTS
OUTPUTS
1OE
2OE
1Dn
2Dn
1On, 2On
L
L
H
L
H
L
H
X
Z
H
= High Voltage Level
L
= Low Voltage Level
Z
= High Impedance State
X
= High or Low Voltage Level and Transitions Are Acceptable; for ICC reasons, DO NOT FLOAT Inputs


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