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74LCX74 数据表(PDF) 4 Page - STMicroelectronics

部件名 74LCX74
功能描述  Low voltage CMOS dual D-Type Flip Flop with 5V tolerant inputs
PDF  17 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74LCX74 数据表(HTML) 4 Page - STMicroelectronics

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Pin settings
74LCX74
4/17
2
Pin settings
2.1
Pin connection
Figure 4.
Pin connection (top through view)
2.2
Pin description
2.3
Truth table
Table 1. Pin description
Pin N°
Symbol
Name and function
1, 13
1CLR, 2CLR
Asynchronous reset - direct input
2, 12
1D, 2D
Data inputs
3, 11
1CK, 2CK
Clock input (LOW to HIGH, Edge Triggered)
4, 10
1PR, 2PR
Asynchronous set - direct input
5, 9
1Q, 2Q
True Flip-Flop outputs
6, 8
1Q, 2Q
Complement Flip-Flop outputs
7
GND
Ground (0V)
14
VCC
Positive supply voltage
Table 2. Truth table
Inputs
Outputs
Function
CLR
PR
D
CK
Q
Q
L
H
X
X
L
H
CLEAR
H
L
X
X
H
L
PRESET
LL
X
X
H
H
HH
L
L
H
HHH
H
L
HH
X (1)
1.
X do not care
Qn
Qn
No change



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