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LT1039AMJ16 Datasheet

  • LT1039AMJ16

  • Triple RS232 Driver/Receiver with Shutdown

  • 12頁

  • LINER

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LT1039A/LT1039A-16
Triple RS232 Driver/Receiver
with Shutdown
FEATURES
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DESCRIPTION
The LT
廬
1039A is a triple RS232 driver/receiver that
includes shutdown. Each receiver will accept up to
鹵30V
input and can drive either TTL or CMOS logic. The RS232
drivers accept TTL logic inputs and output RS232 voltage
levels. The outputs are fully protected against overload
and can be shorted to ground or up to
鹵30V
without
damage to the drivers. Additionally, when the system is
shut down or power is off, the outputs are in a high
impedance state allowing data line sharing. On-chip ESD
protection eliminates the need for external protection
devices.
A bias pin allows one receiver to be kept on while the rest
of the part is shut down.
The LT1039A is also available in the 16-pin version,
without shutdown or bias pin functions.
For applications requiring operation from a single 5V
supply, see the LT1180A/LT1181A and LT1130A data
sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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On-Chip ESD Protection:
鹵15kV
Human Body Model
鹵15kV
IEC-1000-4-2 Air Gap Test**
鹵8kV
IEC-1000-4-2 Contact Test
125kBd Operation with 3k鈩?2500pF Load
250kBd Operation with 3k鈩?1000pF Load
Operates from
鹵5V
to
鹵15V
Supplies
Fully Protected Against Overload
Outputs Can Be Driven
鹵30V
Without Damage
Three-State Outputs; Outputs Open When Off
Bipolar Circuit鈥擭o Latchup
鹵30V
Input Range
Triple Driver/Receiver
No Supply Current in Shutdown
30k鈩?Input Impedance
Meets All RS232 Specifications
16-Pin Version鈥擯in Compatible with MC145406
Available in SO Package
APPLICATIONS
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RS232 Interface
Terminals
Modems
TYPICAL APPLICATION
12V
BIAS*
RS232 IN
50鈩?*
RS232 OUT
RS232 IN
*BIAS PIN USED
50鈩?*
TO KEEP THE
RS232 OUT
RECEIVER ON
WHILE IN SHUTDOWN
RS232 IN
**50鈩?RESISTORS
MAY BE REQUIRED
50鈩?*
FOR IEC-1000-4-2
RS232 OUT
ESD PROTECTION
DEPENDING UPON
鈥?12V
PC BOARD AND
CONNECTOR LEAD LENGTH
1
2
3
30k
4
5
30k
6
7
30k
8
9
V
鈥?/div>
GND
1039A TA01
1039A TA02
V
+
LT1039A
V
CC
18
17
16
5V
ON/OFF
LOGIC
Driver Output Swing
OUTPUT VOLTAGE REFERRED TO SUPPLIES (V)
V
+
鈥?0.4
鈥?0.8
鈥?.2
鈥?.6
鈥?2.0
15
14
LOGIC
LOGIC
13
12
LOGIC
LOGIC
1.2
0.8
0.4
V
鈥?/div>
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT CURRENT (mA)
11
10
LOGIC
U
U
U
1

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