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LTC1385| Datasheet

By datasheet - November 4th, 2008

LTC1385| Datasheet

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LTC1385 3.3V Low Power EIA/TIA-562 Transceiver

FEATURES
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DESCRIPTIO

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Operates from a Single 3.3V Supply Low Supply Current: ICC = 200uA ICC = 35uA in Driver Disable Mode ICC = 0.2uA in Shutdown Mode ESD Protection Over 10kV Uses Small Capacitors: 0.1uF Operates to 120kBaud Output Overvoltage Does Not Force Current Back into Supplies EIA/TIA-562 I/O Lines Can Be Forced to 25V Without Damage Pin Compatible with LT1180A

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 spacesaving 0.1uF capacitors. The transceiver operates in one of three modes: Normal, Driver Disable or Shutdown. In the Normal mode, ICC is only 200uA 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 ICC drops to 35uA. In the Shutdown mode, everything is turned off and ICC drops to 0.2uA. 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, 3k 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.

APPLICATIO S
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Notebook Computers Palmtop Computers

TYPICAL APPLICATIO

2-Drivers/2-Receivers with Shutdown and Driver Disable
2 0.1uF 0.1uF LOGIC INPUT 4 5 6 VCC 12 VCC LOGIC INPUT LOGIC OUTPUT LOGIC OUTPUT 11 13 10 5k 5k ON/OFF 18 1 DRIVER DISABLE
LTC1385 TA01

Quiescent and Shutdown Supply Current vs Temperature
600 1.2 1.0
SHUTDOWN CURRENT (uA)

17 LTC1385 3 7 300k 15 300k 8 14 9

VCC = 3.3V
500
QUIESCENT CURRENT (uA)

0.1uF 562 OUTPUT

0.1uF

400 300 200 100 0 20 SHUTDOWN CURRENT 0 20 40 TEMPERATURE ( C) 60 QUIESCENT CURRENT

562 OUTPUT 562 INPUT 562 INPUT

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TEST CONDITION: VCC = 3.3V
LTC1385 TA02

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0.8 0.6 0.4 0.2 0 80
sn1385 1385fas

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