(No.49845)1-25
4.3 HD74HC126FP-X (IC801) : Buffer
• Pin layout
• Pin function
Note:
H:High level
L:Low level
X:Irrelevant
Z:Off(High-impedance)
State a 3-state input
• Block diagram
Note:
CL includes probe and jig capacitance
4.4 LB1641 (IC402) : DC Motor driver
• Pin function
4.5 RPM6938-SV4 (IC602) : Remote control receiver
• Block diagram
1
2
3
4
5
6
7
1C
1A
1Y
2C
2A
2Y
GND
VCC
4C
4A
4Y
3C
3A
3Y
14
13
12
11
10
9
8
Input
Output
C
A
Y
L
X
Z
H
L
H
H
H
L
Vcc
Vcc
Input
See Function
Table
1A
2A
3A
4A
1C
2C
3C
4C
1Y
2Y
3Y
4Y
Output
Output
Output
Output
Sample as Load Circuit 1
Sample as Load Circuit 1
Sample as Load Circuit 1
1k
1k
S1
CL
6
7
8
9
10
IN2 VCC1 VCC2 P2
OUT2
Input
Output
Mode
IN1
IN2
OUT1
OUT2
0
0
0
0
Brake
1
0
1
0
CLOCKWISE
0
1
0
1
COUNTER-CLOCKWISE
1
1
0
0
Brake
AMP
AGC
Detector
BPF
I/V
conversion
PD
Vcc
Comp
22k
ohm
magnetic shield
VDD
OUT
GND
for
trimming circuit
3
1
2
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