74AC109 FAIRCHILD [Fairchild Semiconductor], 74AC109 Datasheet - Page 2

• Manufacturer Part Number: 74AC109
• Description: Dual JK Positive Edge-Triggered Flip-Flop
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

www.fairchildsemi.com
Logic Symbols
Truth Table
(each half)
Q
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.
0
(Q

H
L
X
0
)
LOW Voltage Level
LOW-to-HIGH Transition
HIGH Voltage Level
Immaterial
Previous Q
0
(Q
0
) before LOW-to-HIGH Transition of Clock
(one half shown)
S
H
H
H
H
H
H
L
L
D
C
H
H
H
H
H
H
L
L
D
Inputs
CP




X
X
X
L
IEEE/IEC
2
X
X
X
H
H
X
J
L
L
K
X
X
X
H
H
X
L
L
Q
Q
Q
H
H
H
L
L
Outputs
0
0
Toggle
Q
Q
Q
H
H
H
L
L
0
0