ST75185 ST Microelectronics, ST75185 Datasheet - Page 6

• Manufacturer Part Number: ST75185
• Description: MULTIPLE RS-232 DRIVERS AND RECEIVERS
• Manufacturer: ST Microelectronics

ST75185
APPLICATION CIRCUITS
FIGURE 1: Driver Test Circuit for V
I
6/12
SO(H)
To CPU
(16550)
and I
UART
TTL LEVEL
SO(L)
RI
DCD
RXD
CTS
DTR
DSR
RTS
TXD
39
32
11
36
38
37
21
33
100nF
Vcc
+5 V
19
18
14
13
12
20
17
16
15
11
Rout1
OH
Vcc
Rout2
Rout5
Din1
Rout3
Di n2
Rout4
Din3
GND
, V
ST75185
OL
,
Dout2
Dout3
Vdd
Ri n2
Ri n3
Dout1
Rin4
Rin5
Vss
Rin1
Vss
-12V
10
4
1
2
3
5
6
7
8
9
FIGURE 2: Driver Test Circuitfor I
100nF
C
Vdd
+12 V
L
100nF
C
L
C
L
RI
DCD
DSR
RXD
RTS
TXD
CTS
DTR
GND
RS232 LEVEL
1
2
3
4
5
Dib9 Serial Port Connector
6
7
8
9
IH
PC Serial Port
and I
IL