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HD74HC78 Datasheet(PDF) 2 Page - Hitachi Semiconductor

Part No. HD74HC78
Description  Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock)
Download  10 Pages
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Maker  HITACHI [Hitachi Semiconductor]
Homepage  http://www.renesas.com/eng
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HD74HC78 Datasheet(HTML) 2 Page - Hitachi Semiconductor

 
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background image
HD74HC78
2
Function Table
Inputs
Outputs
Preset
Clear
Clock
J
K
Q
Q
L
H
X
XXH
L
H
L
X
XXL
H
L
L
X
XXH*
1
H*
1
HH
L
L
No change
HH
LH
L
H
HH
HL
H
L
HH
H
H
Toggle
H
H
L
X
X
No change
H
H
H
X
X
No change
HH
X
X
No change
Note:
1. Q and
Q will remain HIGH as long as Preset and Clear are Low, but Q and Q are unpredictable,
if Preset and Clear go HIGH simultaneously.
Pin Arrangement
1
2
3
4
5
6
7
CK
1PR
1J
VCC
CLR
2PR
2K
1K
1Q
1
Q
GND
2J
2
Q
2Q
14
13
12
11
10
9
8
(Top view)
CK
K
Q
Q
J
CLR
PR
CK
K
Q
Q
J
CLR
PR


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