GD75232 Datasheet, PDF (11/12 Pages) Texas Instruments – MULTIPLE RS-232 DRIVERS AND RECEIVERS

GD75232
MULTIPLE RS-232 DRIVERS AND RECEIVERS
APPLICATION INFORMATION
SLLS206C – MAY 1995 – REVISED JULY 1998
Diodes placed in series with the V_DD and V_SS leads protect the GD75232 in the fault condition in which the device
outputs are shorted to ± 15 V and the power supplies are at low and provide low-impedance paths to ground (see
Figure 15).
VDD
Output
± 15 V
VDD
GD75232
GD75232
VSS
VSS
Figure 15. Power-Supply Protection to Meet Power-Off Fault Conditions of TIA/EIA-232-F
TL16C450
ACE
RI ⁴³
DTR ³⁷
CTS ⁴⁰
SO ¹³
RTS ³⁶
SI ¹¹
DSR ⁴¹
DCD ⁴²
– 12 V
11
10
5
GND
VSS
12
RY5
RA5 ^{9 RI}
13
DA3
14
RY4
DY3 ^{8 DTR}
RA4 ^{7 CTS}
C3
15
DA2
16
DA1
17
RY3
GD75232
DY2 ^{6 TX}
DY1 ^{5 RTS}
C2
RA3 ^{4 RX}
C1
18
RY2
RA2 ^{3 DSR}
19
RY1
20
VCC
RA1 ^{2 DCD}
1
VDD
12 V
1
5V
Figure 16. Typical Connection
9
TIA/EIA-232-F
DB9S
Connector
6
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