LTC1382ISW Просмотр технического описания (PDF) - Linear Technology
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LTC1382ISW Datasheet PDF : 8 Pages
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FEATURES
■ Operates from a Single 5V Supply
■ Low Supply Current: ICC = 220µA
■ ICC = 0.2µA in Shutdown Mode
■ ESD Protection Over ±10kV
■ Uses Small Capacitors: 0.1µF
■ Operates to 120kBaud
■ Output Overvoltage Does Not Force Current
Back into Supplies
■ RS232 I/O Lines Can Be Forced to ±25V
Without Damage
■ Pin Compatible with LT1180A
U
APPLICATIO S
■ Notebook Computers
■ Palmtop Computers
TYPICAL APPLICATIO
LTC1382
5V Low Power
RS232 Transceiver
with Shutdown
DESCRIPTIO
The LTC®1382 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 0.1µF capacitors.
The transceiver operates in one of two modes, Normal
and Shutdown. In the Normal mode, ICC is only 220µA
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
ICC drops to 0.2µA.
The LTC1382 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120kbaud with a 2500pF, 3kΩ load. Both
driver outputs and receiver inputs can be forced to
±25V without damage and can survive multiple ±10kV
ESD strikes.
, LTC and LT are registered trademarks of Linear Technology Corporation.
2-Drivers/2-Receivers with Shutdown
0.1µF
0.1µF
LOGIC INPUT
LOGIC INPUT
LOGIC OUTPUT
2
4
5
LTC1382
6 VCC
300k
12
VCC
300k
11
13
5k
17 VCC = 5V
3
7
0.1µF
0.1µF
15 232 OUTPUT
8
232 OUTPUT
14
232 INPUT
10
LOGIC OUTPUT
18
ON/OFF
9
232 INPUT
5k
16
LTC1382 • TA01
Quiescent and Shutdown Supply Current
vs Temperature
600
1.2
TEST CONDITION: VCC = 5V
500
1.0
400
0.8
300
QUIESCENT
0.6
CURRENT
200
0.4
SHUTDOWN
CURRENT
100
0.2
0
–20
0
0
20
40
60
80
TEMPERATURE (°C)
LTC1382 • TA02
1382fa
1
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