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QQ
3 7 63 1515 0
4.7
HD74HC126FP-X (IC801) : Buffer
• Pin layout
1
1C
2
1A
1Y
3
4
2C
5
2A
6
2Y
GND
7
• Block diagram
Vcc
Input
TE
L 13942296513
Note:
CL includes probe and jig capacitance
4.8
LB1641 (IC402) : DC Motor driver
• Pin layout
1
2
3
4
5
GND OUT1 P1
VZ
IN1
www
.
1-28 (No.49854)
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14
VCC
13
4C
12
4A
11
4Y
10
3C
9
3A
8
3Y
Vcc
1A
1Y
2A
3A
4A
1C
2C
3C
2Y
4C
3Y
4Y
6
7
8
9
10
IN2 VCC1 VCC2 P2
OUT2
x
ao
u163
y
i
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2 9
8
• Pin function
Input
Output
C
A
Y
L
X
Z
H
L
H
H
H
L
Note:
H:High level
L:Low level
X:Irrelevant
Z:Off(High-impedance)
State a 3-state input
1k
Output
CL
Q Q
3
6 7
1 3
Output
Sample as Load Circuit 1
Output
Sample as Load Circuit 1
Output
Sample as Load Circuit 1
• Truth table
Input
Output
IN1
IN2
OUT1
0
0
0
1
0
1
0
1
0
1
1
0
.
9 4
2 8
S1
1k
1 5
0 5
8
2 9
9 4
Mode
OUT2
0
Brake
0
CLOCKWISE
1
COUNTER-CLOCKWISE
0
Brake
m
co
9 9
2 8
9 9
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