+ 5V供电，多通道RS - 232
驱动器/接收器
MAX220–MAX249
顶视图
1.0F
+ 5V输入
9
10
1.0F
12
13
1.0F
C1+
C1-
C2+
+ 10V至-10V
高压变频器
+5V
400k
7 T1
IN
T3
OUT
1
T1
OUT
2
T2
OUT
3
R1
IN
4
R1
OUT
5
T2
IN
6
T1
IN
7
GND 8
V
CC
9
C1+ 10
V+ 11
C1- 12
24 T4
OUT
23 R2
IN
22 R2
OUT
21 SHDN
TTL / CMOS
输入
18 T3
IN
+5V
400k
19 T4
IN
T4
T4
OUT
24
6 T2
IN
+5V
400k
T3
T3
OUT
1
+5V
400k
T2
T2
OUT
3
T1
T1
OUT
2
V
CC
+ 5V至+ 10V
倍压
V+
11
1.0F
V-
15
1.0F
14 C2-
MAX236
20 EN
19 T4
IN
18 T3
IN
17 R3
OUT
16 R3
IN
15 V-
14 C2-
13 C2+
5 R1
OUT
RS-232
输出
R1
5k
R1
IN
4
DIP / SO
TTL / CMOS
输出
22 R2
OUT
R2
5k
17 R3
OUT
R3
IN
5k
20 EN
GND
8
SHDN
21
16
R2
IN
23
RS-232
输入
R3
图14. MAX236引脚配置和典型工作电路
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