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LTC1337C Datasheet

  • LTC1337C

  • Linear Technology [5V Low Power RS232 3-Driver/5-Receiver T...

  • LINER

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LTC1337
5V Low Power RS232
3-Driver/5-Receiver Transceiver
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
Low Supply Current: 300碌A(chǔ)
1碌A(chǔ) Supply Current in SHUTDOWN
ESD Protection: Over
鹵10kV
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1碌F
Operates to 120k Baud
Three-State Outputs Are High Impedance When Off
Output Overvoltage Does Not Force Current Back into
Supplies
RS232 I/O Lines Can Be Forced to
鹵25V
without
Damage
Pin Compatible with LT1137A and LT1237
Flowthrough Architecture
The LTC1337 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. In the no load condition, the
supply current is only 300碌A(chǔ). The charge pump only
requires four 0.1碌F capacitors and can supply up to 12mA
of extra current to power external circuitry.
In SHUTDOWN mode, the supply current is further re-
duced to 1碌A(chǔ). All RS232 outputs assume a high imped-
ance state in SHUTDOWN and with the power off.
The LTC1337 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120k baud with a 1000pF// 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
3-Drivers/5-Receivers with SHUTDOWN
V
+
C1
0.1碌F
C2
0.1碌F
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LTC1337
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1337 TA01
C3
0.1碌F
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
C4
0.1碌F
QUIESCENT CURRENT OPERATING (碌A(chǔ))
V
鈥?/div>
600
500
400
300
200
100
0
SHUTDOWN
CURRENT
鈥?0
TEST CONDITION:
V
CC
= 5V, ALL DRIVER INPUTS TIED TO V
CC
1337 TA02
U
Supply Current
1.2
1.0
SHUTDOWN CURRENT (碌A(chǔ))
UO
UO
QUIESCENT
CURRENT
0.8
0.6
0.4
0.2
0
0
20
40
60
TEMPERATURE (擄C)
80
1

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