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參數(shù)資料
| 型號： | LT1039ISW#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DRIVR/RCVR TRPLE-RS232 18SOIC |
| 標準包裝： | 40 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 3/3 |
| 規(guī)程： | RS232 |
| 電源電壓： | 5 V ~ 15 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 18-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 18-SOIC |
| 包裝： | 管件 |
6
LT1039/LT1039-16
1039fd
APPLICATIONS INFORMATION
WU
U
The driver output stage of the LT1039 offers significantly
improved protection over older bipolar and CMOS de-
signs. In addition to current limiting, the driver output
can be externally forced to
±30V with no damage or
excessive current flow, and will not disrupt the supplies.
LT1039 Driver
Some drivers have diodes connected between the out-
puts and the supplies, so externally applied voltages can
cause excessive supply voltage to develop
LT1039 #1
DRIVER
LT1039 #2
DRIVER
LOGIC
INPUT A
LOGIC
INPUT B
1039 AI03
ON/OFF
(CHANNEL SELECT)
INPUT
LOGIC
INVERTER
RS232
TRANSMISSION
LINE
Sharing a Receiver Line
WITH SOME DRIVERS,
EXTERNALLY APPLIED
VOLTAGE CAN FORCE
THE SUPPLIES
1039 AI02
V +
V –
Older RS232 Drivers and Other CMOS Drivers
Sharing a Transmitter Line
Placing the LT1039 in the shutdown mode (Pin 17 low)
puts both the driver and receiver outputs in a high imped-
ance state. This allows data line sharing and transceiver
applications.
–30V
30V
OUTPUT CAN
BE FORCED
EXTERNALLY
1039 AI01
LT1039
Transceiver
LT1039 #1
RECEIVER
RS232
INPUT A
RS232
INPUT B
1039 AI04
ON/OFF
(CHANNEL SELECT)
INPUT
LOGIC
INVERTER
LOGIC
OUTPUT
LT1039 #2
RECEIVER
LT1039 #1
DRIVER
LOGIC
TRANSMIT/RECEIVE
LINE
RS232
TRANSMIT/RECEIVE
LINE
1039 AI05
ON/OFF
(TRANSMIT/RECEIVE)
INPUT
LOGIC
INVERTER
LT1039 #2
RECEIVER
The shutdown mode also drops all supply currents (VCC,
V +, V –) to zero for power conscious systems.
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