JVC UX-A7DVD User Manual

UX-A7DVD
(No.22013)1-41
SECTION 4
Description of major ICs
4.1 74VHC00MTC-X (IC455,IC503) : NAND Gate
•Pin layout
• Truth table
L : High impedance
4.2 74VHC74MTC-X (IC454) : Flip-Flop with Preset and Clenar
• Terminal layout
• Trouth table
• Pin function
14
13
12
11
10
9
8
V
cc
A
2
B
2
O
2
A
3
B
3
O
3
A
0
B
0
O
0
A
1
B
1
O
1
GND
1
2
3
4
5
6
7
ABY
LLH
LHH
HLH
HHL
1
2
3
4
5
6
7
CLR1
D1
CK1
PR1
Q1
Q1
GND
14
13
12
11
10
9
8
Vcc
CLR2
D2
CK2
PR2
Q2
Q2
CK1 D1
Q1 Q1
PR1CLR1
CK2D2
Q2 Q2
PR2CLR2
CLR
L
H
L
H
H
H
PR
H
L
L
H
H
H
D
X
X
X
L
H
X
CK
X
X
X
Q
L
H
H(Note 1)
L
H
Qn
Q
H
L
H(Note 1)
H
L
Qn
Input Output
Function
Clear
Preset
No change
Pin No. Symbol I/O Description
1 CLR1 I Direct clear input 1
2 D1 I Data input 1
3 CK1 I Clock pulse input 1
4 PR1 I Direct preset input 1
5 Q1 O Output
6 Q1 O Output
7 GND - Connect to ground
8 Q2 O Output
9 Q2 O Output
10 PR2 I Direct preset input 2
11 CK2 I Click pulse input 2
12 D2 I Data input 2
13 CLR2 I Clock clear input 2
14 VCC - Power supply

JVC UX-A7DVD Specifications

General

Brand	JVC
Model	UX-A7DVD
Category	Stereo System
Language	English