LTC1385_1 Datasheet, PDF (1/8 Pages) Linear Technology – 3.3V Low Power EIA/TIA-562 Transceiver

LTC1385
3.3V Low Power
EIA/TIA-562 Transceiver
FEATURES
s _{Operates from a Single 3.3V Supply}
s _{Low Supply Current: ICC = 200µA}
s _{ICC = 35µA in Driver Disable Mode}
s _{ICC = 0.2µA in Shutdown Mode}
s _{ESD Protection Over ±10kV}
s _{Uses Small Capacitors: 0.1µF}
s _{Operates to 120kBaud}
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 _{Pin Compatible with LT1180A}
U
APPLICATIO S
s _{Notebook Computers}
s _{Palmtop Computers}
DESCRIPTIO
The LTC^®1385 is an ultra-low power, 2-driver/2-receiver
EIA / TIA-562 transceiver which operates from a single
3.3V supply. The charge pump requires only four space-
saving 0.1µF capacitors.
The transceiver operates in one of three modes: Normal,
Driver Disable or Shutdown. In the Normal mode, I_CC is
only 200µA in the unloaded condition. In the Driver Disable
mode, the charge pump is turned off, the driver outputs
are forced into three-state, both receivers are kept active,
and I_CC drops to 35µA. In the Shutdown mode, everything
is turned off and I_CC drops to 0.2µA.
The LTC1385 is fully compliant with all data rate and
overvoltage EIA / TIA-562 specifications. The transceiver
can operate up to 120kbaud 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
2-Drivers/2-Receivers with Shutdown
and Driver Disable
0.1µF
2
4
LTC1385
5
0.1µF
6 ^VCC
300k
LOGIC INPUT ¹²
V_CC
300k
LOGIC INPUT ¹¹
LOGIC OUTPUT ¹³
10
5k
LOGIC OUTPUT
5k
ON/OFF ¹⁸
1
DRIVER DISABLE
17
VCC = 3.3V
3
7
0.1µF
15
562 OUTPUT
8 _{562 OUTPUT}
14
562 INPUT
9 _{562 INPUT}
16
0.1µF
LTC1385 • TA01
Quiescent and Shutdown Supply Current
vs Temperature
600
1.2
500
1.0
400
0.8
300
QUIESCENT
CURRENT
0.6
200
0.4
100
SHUTDOWN ^0.2
CURRENT
0
0
– 20
0
20
40
60
80
TEMPERATURE (°C)
TEST CONDITION: V_CC = 3.3V
LTC1385 • TA02
sn1385 1385fas
1