+ 5V供电，多通道RS - 232
驱动器/接收器
MAX220–MAX249
+5V
顶视图
1F
21
TB
4
OUT
T
A4
OUT
T
A3
OUT
T
A2
OUT
T
A1
OUT
T
B1
OUT
T
B2
OUT
T
B3
OUT
1F
R
B5
IN
1F
6
5
4
3
2
1
44 43 42 41 40
1F
20
V
CC
+ 5V至+ 10V电压DOUBLER
+ 10V至-10V的电压逆变器
+5V
400k
+5V
T
B1
OUT 44
T
B1
在30
+5V
400k
16 T
A2
IN
3 T
A3
OUT
17 T
A3
IN
4 T
A4
OUT
18 T
A4
IN
9 R
A1
IN
5k
10 R
A1
OUT
8 R
A2
IN
5k
11 R
A2
OUT
7 R
A3
IN
5k
12 R
A3
OUT
6 R
A4
IN
5k
13 R
A4
OUT
5 R
A5
IN
5k
14 R
A5
OUT
5k
R
B5
OUT 31
5k
R
B4
OUT 32
R
B5
40
5k
R
B3
OUT 33
R
B4
39
5k
R
B2
出34
R
B3
38
5k
R
B1
出35
R
B2
37
+5V
400k
T
B4
27
R
B1
36
+5V
+5V
400k
T
B3
28
T
B4
OUT 41
+5V
T
B2
29
T
B3
OUT 42
+5V
T
B2
OUT 43
C1+
23 C1-
24
C2+
25 C2-
2 T
A1
OUT
15 T
A1
IN
2 T
A2
OUT
22
V+
26
V- 1μF
R
A4
IN
R
A3
IN
R
A2
IN
R
A1
IN
R
A1
OUT
R
A2
OUT
R
A3
OUT
R
A4
OUT
R
A5
OUT
T
A1
IN
T
A2
IN
T
A3
IN
R
A5
IN
7
8
9
10
11
12
13
14
15
16
17
18
19 20 21 22 23 24 25 26 27 28
39
R
B4
IN
38
R
B3
IN
37
R
B2
IN
36
R
B1
IN
35
R
B1
OUT
34
R
B2
OUT
33
R
B3
OUT
32
R
B4
OUT
31
R
B5
OUT
30
T
B1
IN
29
T
B2
IN
MAX244
C1-
T
A4
IN
C2-
T
B4
IN
PLCC
MAX249功能说明
10个接收器
5人制接收机
5 B - SIDE接收器
8变送器
4人制变送器
4 B- SIDE变送器
NO控制引脚
T
B3
IN
C1+
GND
C2+
V+
V
CC
V-
GND
19
图20. MAX244引脚配置和典型工作电路
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