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HD74HC108 Datasheet(PDF) 2 Page - Hitachi Semiconductor

Part No. HD74HC108
Description  Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock)
Download  9 Pages
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Maker  HITACHI [Hitachi Semiconductor]
Homepage  http://www.renesas.com/eng
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HD74HC108 Datasheet(HTML) 2 Page - Hitachi Semiconductor

   
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HD74HC108
2
Function Table
Inputs
Output
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
Q
Q
CK
JK
PR
CLR
(Top View)
2
3
4
5
6
7
1K
1Q
1Q
1J
2Q
2Q
GND
VCC
1PR
CLR
2J
2PR
CK
2K
14
13
12
11
10
9
8
Q
Q
CK
JK
PR
CLR


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