LTC1327 Datasheet, PDF (1/8 Pages) Linear Technology – 3.3V Micropower EIA/TIA-562 Transceiver

LTC1327
3.3V Micropower EIA/TIA-562
Transceiver
FEATURES
s _{Low Supply Current}
300µA
s _{0.2µA Supply Current in SHUTDOWN}
s _{ESD Protection}
±10kV
s _{Operates From a Single 3.3V Supply}
s _{Uses Small Capacitors}
0.1µF
s _{Operates To 120k Baud}
s _{Three-State Outputs are High Impedance When Off}
s _{Output Overvoltage Does Not Force Current Back}
Into Supplies
s _{EIA/TIA-562 I/O Lines Can Be Forced to ±25V}
Without Damage
s _{Flowthrough Architecture}
APPLICATI S
s _{Notebook Computers}
s _{Palmtop Computers}
DESCRIPTIO
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 300µA. The charge pump only
requires four 0.1µF capacitors.
In SHUTDOWN mode, the supply current is further re-
duced to 0.2µA. 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//3kΩ load.
Both driver outputs and receiver inputs can be forced to
±25V without damage, and can survive multiple ±10kV
ESD strikes.
TYPICAL APPLICATI
C1
0.1µF
3-Drivers/5-Receivers with SHUTDOWN
V⁺ 1
V_CC ²
3
C2
0.1µF
4
DR1 OUT ⁵
RX1 IN ⁶
DR2 OUT ⁷
8
RX2 IN
RX3 IN ⁹
10
RX4 IN
11
DR4 OUT
12
RX5 IN
13
ON/OFF
14
LTC1327
28 V^–
27
26
C3
0.1µF
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
15
C4
0.1µF
1327 TA01
Supply Current vs Temperature
600
1.2
V_CC = 3.3V
ALL DRIVERS INPUTS TIED TO V_CC
500
1.0
400
0.8
QUIESCENT
CURRENT
300
0.6
200
SHUTDOWN
CURRENT
0.4
100
0.2
0
–20
0 20 40 60 80
TEMPERATURE (°C)
LTC1327 • TA02
1