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LTC1382CS Datasheet

  • LTC1382CS

  • Linear Technology [5V Low Power RS232 Transceiver with Shut...

  • LINER

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LTC1382
5V Low Power
RS232 Transceiver
with Shutdown
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
Operates from a Single 5V Supply
Low Supply Current: I
CC
= 220碌A
I
CC
= 0.2碌A in Shutdown Mode
ESD Protection Over
鹵10kV
Uses Small Capacitors: 0.1碌F
Operates to 120kBaud
Output Overvoltage Does Not Force Current
Back into Supplies
RS232 I/O Lines Can Be Forced to
鹵25V
Without Damage
Pin Compatible with LT1180A
The LTC1382 is an ultra-low power 2-driver/2-receiver
RS232 transceiver that operates from a single 5V
supply. The charge pump requires only four space-
saving 0.1碌F capacitors.
The transceiver operates in one of two modes, Normal
and Shutdown. In the Normal mode, I
CC
is only 220碌A
with the driver outputs unloaded. In the Shutdown
mode, the charge pump is turned off, the driver outputs
are forced into three-state, both receivers are off and
I
CC
drops to 0.2碌A.
The LTC1382 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120kbaud with a 2500pF, 3k鈩?load. Both
driver outputs and receiver inputs can be forced to
鹵25V
without damage and can survive multiple
鹵10kV
ESD strikes.
APPLICATI
s
s
S
Notebook Computers
Palmtop Computers
TYPICAL APPLICATI
2-Drivers/2-Receivers with Shutdown
2
0.1碌F
4
5
0.1碌F
6
12
V
CC
300k
LOGIC INPUT
LOGIC OUTPUT
11
13
5k
8
14
232 OUTPUT
232 INPUT
LTC1382
V
CC
300k
15
17
3
7
0.1碌F
0.1碌F
QUIESCENT CURRENT (碌A)
Quiescent and Shutdown Supply Current
vs Temperature
600
1.2
TEST CONDITION: V
CC
= 5V
500
400
300
200
100
0
鈥?0
SHUTDOWN
CURRENT
QUIESCENT
CURRENT
1.0
SHUTDOWN CURRENT (碌A)
V
CC
= 5V
LOGIC INPUT
232 OUTPUT
0
LOGIC OUTPUT
ON/OFF
10
18
5k
9
16
232 INPUT
LTC1382 鈥?TA01
U
0.8
0.6
0.4
0.2
0
20
40
TEMPERATURE (擄C)
60
80
LTC1382 鈥?TA02
UO
UO
1

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