LTC1327
3.3V Micropower EIA/TIA-562
Transceiver
FEATURES
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DESCRIPTIO
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Low Supply Current
300碌A(chǔ)
0.2碌A(chǔ) Supply Current in SHUTDOWN
ESD Protection
鹵10kV
Operates From a Single 3.3V 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
EIA/TIA-562 I/O Lines Can Be Forced to
鹵25V
Without Damage
Flowthrough Architecture
The LTC1327 is an advanced low power, three-driver/five-
receiver EIA/TIA-562 transceiver. 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.
In SHUTDOWN mode, the supply current is further re-
duced to 0.2碌A(chǔ). All EIA/TIA-562 outputs assume a high
impedance state in SHUTDOWN and with the power off.
The LTC1327 is fully compliant with all data rate and
overvoltage EIA/TIA-562 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
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Notebook Computers
Palmtop Computers
TYPICAL APPLICATI
V
+
C1
0.1碌F
C2
0.1碌F
DR1 OUT
RX1 IN
DR2 OUT
RX2 IN
RX3 IN
RX4 IN
DR4 OUT
RX5 IN
ON/OFF
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LTC1327
3-Drivers/5-Receivers with SHUTDOWN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1327 TA01
Supply Current vs Temperature
600
C4
0.1碌F
V
鈥?/div>
C3
0.1碌F
DR1 IN
RX1 OUT
DR2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DR3 IN
RX5 OUT
GND
500
QUIESCENT CURRENT (碌A(chǔ))
V
CC
= 3.3V
ALL DRIVERS INPUTS TIED TO V
CC
400
300
200
100
0
鈥?0
U
1.2
1.0
SHUTDOWN CURRENT (碌A(chǔ))
UO
UO
QUIESCENT
CURRENT
0.8
0.6
SHUTDOWN
CURRENT
0.4
0.2
0
20
40
60
TEMPERATURE (擄C)
80
LTC1327 鈥?TA02
1
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