MAX239 Maxim Integrated Products, MAX239 Datasheet - Page 18

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

+5V-Powered, Multichannel RS-232
Drivers/Receivers
Figure 7. MAX225 Pin Configuration and Typical Operating Circuit
18
______________________________________________________________________________________
TOP VIEW
MAX225 FUNCTIONAL DESCRIPTION
5 RECEIVERS
5 TRANSMITTERS
2 CONTROL PINS
PINS (ENR, GND, V
CONNECT EITHER OR BOTH EXTERNALLY. T
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
R
R
R
T
T
1
2
3
1
2
CC
GND
GND
T
T
R
R
R
ENR
ENR
OUT
OUT
OUT
OUT
OUT
3
2
1
1
2
, T
IN
IN
IN
IN
IN
5
OUT) ARE INTERNALLY CONNECTED.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX225
SO
5
OUT IS A SINGLE DRIVER.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
V
ENT
T
T
T
R
R
R
T
T
R
T
T
4
5
4
CC
CC
3
5
5
4
3
5
5
4
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
22
21
25
24
23
26
7
3
4
5
6
1
2
ENR
ENR
T
T
T
T
T
ENT
R
R
R
R
R
1
2
3
4
5
1
2
3
4
5
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
+5V
+5V
+5V
+5V
+5V
0.1
400kΩ
400kΩ
400kΩ
400kΩ
400kΩ
13
GND
V
CC
28
+5V
GND
V
CC
14
27
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
T
T
T
T
T
T
R
R
R
R
R
1
2
3
4
5
5
OUT
OUT
OUT
OUT
OUT
OUT
1
2
3
4
5
IN
IN
IN
IN
IN
11
12
18
17
16
15
10
9
8
19
20