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MAX232 Datasheet

Multichannel RS-232 Drivers/Receivers

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MAX232 pdf
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
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ENR 1
TA1IN 2
TA2IN 3
TA3IN 4
TA4IN 5
RA5OUT 6
RA4OUT 7
MAX245
RA3OUT 8
RA2OUT 9
RA1OUT 10
RA1IN 11
RA2IN 12
RA3IN 13
RA4IN 14
RA5IN 15
TA1OUT 16
TA2OUT 17
TA3OUT 18
TA4OUT 19
GND 20
DIP
40 VCC
39 ENT
38 TB1IN
37 TB2IN
36 TB3IN
35 TB4IN
34 RB5OUT
33 RB4OUT
32 RB3OUT
31 RB2OUT
30 RB1OUT
29 RB1IN
28 RB2IN
27 RB3IN
26 RB4IN
25 RB5IN
24 TB1OUT
23 TB2OUT
22 TB3OUT
21 TB4OUT
MAX245 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTTERS
4 A-SIDE TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
Figure 21. MAX245 Pin Configuration and Typical Operating Circuit
+5V
16 TA1OUT
2 TA1IN
1μF
+5V
40
VCC
+5V
400kΩ
17 TA2OUT
3 TA2IN
+5V +5V
400kΩ
18 TA3OUT
4 TA3IN
19 TA4OUT
5 TA4IN
+5V +5V
400kΩ
+5V +5V
400kΩ
1 ENR
11 RA1IN
5kΩ
10 RA1OUT
12 RA2IN
5kΩ
9 RA2OUT
13 RA3IN
5kΩ
8 RA3OUT
14 RA4IN
5kΩ
7 RA4OUT
15 RA5IN
5kΩ
6 RA5OUT
GND
20
TB1OUT 24
TB1IN 38
TB2OUT 23
TB2IN 37
TB3OUT 22
TB3IN 36
TB4OUT 21
TB4IN 35
ENT 39
RB1IN 29
5kΩ
RB1OUT 30
RB2IN 28
5kΩ
RB2OUT 31
RB3IN 27
5kΩ
RB3OUT 32
RB4IN 26
5kΩ
RB4OUT 33
RB5IN 25
5kΩ
RB5OUT 34
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