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GD75323 データシートの表示(PDF) - Texas Instruments

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GD75323 MULTIPLE RS-232 DRIVERS AND RECEIVERS TI
Texas Instruments TI
GD75323 Datasheet PDF : 19 Pages
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GD75323
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS213A – JANUARY 1996 – REVISED JUNE 1999
APPLICATION INFORMATION
Diodes placed in series with the VDD and VSS leads protect the GD75323 in the fault condition in which the device
outputs are shorted to VDD or VSS, and the power supplies are at low and provide low-impedance paths to
ground (see Figure 15).
VDD
GD75323
Output
± 15 V
VDD
GD75323
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
10
GND
9
5DA
8
3RY
7
4DA
6
2RY
5
1RY
4
3DA
3
2DA
2
1DA
1
VCC
5V
GD75323
– 12 V
11
VSS
12
5DY
13
3RA
14
4DY
15
2RA
16
1RA
17
3DY
18
2DY
19
1DY
20
VDD
RI
DTR
CTS
TX
RTS
RX
DSR
DCD C2†
12 V
C5†
C4†
C3†
C1†
TIA/EIA-232-F
DB9S
Connector
5
9
6
1
See Figure 10 to select the correct values for the loading capacitors (C1, C2, C3, C4, and C5), which may be required to meet the RS-232
maximum slew-rate requirement of 30 V/µs. The value of the loading capacitors required depends upon the line length and desired slew rate,
but is typically 330 pF.
NOTE C: To use the receivers only, VDD and VSS both must be powered or tied to ground.
Figure 16. Typical Connection
10
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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