LTC1350_15 Datasheet, PDF (1/8 Pages) Linear Technology – 3.3V Low Power EIA/TIA-562 3-Driver/ 5-Receiver Transceiver

FEATURES
■ _{Low Supply Current: 300µA}
■ _{Receivers 4 and 5 Kept Alive}
in Shutdown: 35µA
■ _{ESD Protection: ±10kV}
■ _{Operates from a Single 3.3V Supply}
■ _{Uses Small Capacitors: 0.1µF}
■ _{Operates to 120kBaud}
■ _{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 ±25V}
Without Damage
■ _{Flowthrough Architecture}
U
APPLICATIO S
■ _{Notebook Computers}
■ _{Palmtop Computers}
TYPICAL APPLICATIO
3-Drivers/5-Receivers with Shutdown
V^{+ 1}
2
V_CC
C1^{+ 3}
C1^{– 4}
5
DR1 OUT
6
RX1 IN
7
DR2 OUT
8
RX2 IN
9
RX3 IN
10
RX4 IN
11
DR3 OUT
12
RX5 IN
13
ON/OFF
14
NC
LTC1350
28 _{V –}
27 _C2+
26 _C2–
25
DR1 IN
24
RX1 OUT
23
DR2 IN
22
RX2 OUT
21
RX3 OUT
20
RX4 OUT
19
DR3 IN
18
RX5 OUT
17
GND
16
NC
15
NC
LTC1350 • TA01
LTC1350
3.3V Low Power
EIA/TIA-562 3-Driver/
5-Receiver Transceiver
DESCRIPTIO
The LTC^®1350 is a 3-driver/5-receiver EIA/TIA-562
transceiver with very low supply current. In the no load
condition, the supply current is only 300µA. The charge
pump only requires four 0.1µF capacitors.
In Shutdown mode, two receivers are kept alive and the
supply current is only 35µA. All RS232 outputs assume
a high impedance state in Shutdown or with the power
off.
The LTC1350 is fully compliant with all data rate and
overvoltage EIA/TIA-562 specifications. The transceiver
can operate up to 120kbaud with a 1000pF and 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.
Quiescent and Shutdown Supply Current
vs Temperature
600
85
TEST CONDITION: V_CC = 3.3V
ALL DRIVER INPUTS TIED TO V_CC
500
75
400
65
QUIESCENT
CURRENT
300
55
200
45
SHUTDOWN CURRENT
100
35
0
–40 –20
0 20 40 60
TEMPERATURE (˚C)
0
80 100
LTC1350 • TA02
1350fa
1