MAX239 Maxim Integrated Products, MAX239 Datasheet - Page 29

• Manufacturer Part Number: MAX239
• Description: (MAX220 - MAX249) +5V-Powered / Multichannel RS-232 Drivers/Receivers
• Manufacturer: Maxim Integrated Products

Figure 20. MAX244 Pin Configuration and Typical Operating Circuit
R
R
R
R
R
A1
A2
A3
A4
A5
R
R
R
T
T
T
A3
A2
A1
OUT
OUT
OUT
OUT
OUT
A1
A2
A3
TOP VIEW
IN
IN
IN
IN
IN
IN
10
11
12
13
14
15
16
17
8
7
9
MAX249 FUNCTIONAL DESCRIPTION
10 RECEIVERS
8 TRANSMITTERS
NO CONTROL PINS
5 A-SIDE RECEIVER
5 B-SIDE RECEIVER
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
18
6
______________________________________________________________________________________
19 20
5
4
21
3
MAX244
22 23
2
PLCC
1
+5V-Powered, Multichannel RS-232
44
24
43
25
42
26
41
27 28
40
39
38
37
36
35
34
33
32
31
30
29
R
R
R
R
R
R
R
R
R
T
T
B1
B2
B4
B3
B2
B1
B1
B2
B3
B4
B5
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
1µF
1µF
21
23
24
25
16
17
18
10 R
11 R
12 R
13 R
14
15
2
2
3
4
9 R
8 R
7 R
6 R
5 R
C1+
C1-
C2+
C2-
T
T
T
T
T
T
R
T
T
A2
A2
A3
A3
A4
A4
A1
A1
A1
A1
A2
A2
A3
A3
A4
A4
A5
A5
OUT
IN
OUT
IN
OUT
IN
OUT
IN
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
Drivers/Receivers
+10V TO -10V VOLTAGE INVERTER
1µF
+5V TO +10V VOLTAGE DOUBLER
+5V
+5V
+5V
+5V
400kΩ
400kΩ
400kΩ
400kΩ
GND
V
+5V
CC
19
20
+5V
+5V
+5V
+5V
1µF
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
T
T
T
R
R
R
R
R
T
B2
B3
B4
B1
B2
B3
B4
B5
B1
T
T
T
R
R
R
R
R
T
OUT
B1
OUT
B2
OUT
B3
OUT
B4
B1
OUT
B2
OUT
B3
OUT
B4
OUT
B5
OUT
V+
V-
IN
IN
IN
IN
IN
IN
IN
IN
IN
22
26
43
29
42
28
41
27
36
35
37
34
38
33
39
32
40
31
1µF
44
30
29