M74HC109 데이터 시트보기 (PDF) - STMicroelectronics
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M74HC109 Datasheet PDF : 11 Pages
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M54/M74HC109
PIN DESCRIPTION
PIN No
1, 15
2, 4, 3, 13
4, 12
5, 11
6, 10
7, 9
8
16
SYMBOL
1CLR, 2CLR
1J, 2J, 1K,
2K
1CK, 2CK
1PR, 2PR
1Q, 2Q
1Q, 2Q
GND
VCC
NAME AND FUNCTION
Asynchronous Reset
Direct Input
Syncronous Inputs;
Flip-flops 1 and 2
Clock Input
Asynchronous Set Direct
Input (Active LOW)
True Flip-flop Outputs
Complement Flip-flop
Outputs
Ground (0V)
Positive Supply Voltage
IEC LOGIC SYMBOL
LOGIC CIRCUIT
TRUTH TABLE
INPUTS
CLR
PR
J
K
L
H
X
X
H
L
X
X
L
L
X
X
H
H
L
H
H
H
L
L
H
H
H
H
H
H
H
L
H
H
X
X
X = DON’T CARE
2/11
OUTPUTS
CK
Q
Q
X
L
H
X
H
L
X
H
H
Qn
Qn
L
H
H
L
Qn
Qn
Qn
Qn
FUNCTION
CLEAR
PRESET
NO CHANGE
TOGGLE
NO CHANGE
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