ICL8052A/ICL71C03, ICL8068A/ICL71C03
+5V
1
4 / DIGIT LCD DISPLAY
2
28 SEGMENTS
- D
D
1
4
1
/
CD4030
2
BACKPLANE
ICM7211A
5 BP
+5V
ICL71C03(A)
2
V+
1
1
2
BUSY 28
1
1
CD4081
CD4071
/ CD4030
4
4 / / 3 /
2
D
D
D
D
B
B
B
B
D
27
26
25
24
23
22
21
20
19
1
2
3
4
8
4
2
1
5
31 D
32 D
1
2
POL
R/H
3
4
33 D
34 D
3
4
2, 3, 4
6 - 26
37 - 40
COMP IN
V-
5
-15V
6
30 B
29 B
28 B
27 B
3
2
1
OPTIONAL
REF
7
CAPACITOR
+5V
OSC 36
V+ 1
REF. CAP. 1
REF. CAP. 2
INPUT
8
1µF
100kΩ
22-100pF
9
0
CD4071
10
11
12
13
14
INPUT
0.1µF
35 V-
ANALOG GND
CLOCK
UR
STROBE 18
A-Z IN 17
0V
+5V
A-Z OUT 16
DIG GND 15
+5V
1
+5V
/
CD4030
4
OR
4.7kΩ
0V
0V
1
2
3
4
V-
V+
8
7
6
5
ICM7555
OUT
1.0µF
10 TO 15kΩ
ADJUST TO
= 120kHz
+5V
RESET
-15V
300µF
F
1
2
3
4
5
6
7
14
13
12
11
10
9
CL
0.22µF
100kΩ
300pF
36kΩ
ICL8052A
8068A
0V
300kΩ
-15V
+15V
5kΩ
10kΩ
8
10µF
ANALOG GND
1
FIGURE 11. 4 / DIGIT LCD DPM WITH DIGIT BLANKING ON OVERRANGE
2
16
ETC [ ETC ]
