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LTC1385 Dataheets PDF



Part Number LTC1385
Manufacturers Linear Technology
Logo Linear Technology
Description 3.3V Low Power EIA/TIA-562 Transceiver
Datasheet LTC1385 DatasheetLTC1385 Datasheet (PDF)

LTC1385 3.3V Low Power EIA/TIA-562 Transceiver FEATURES s s s s s s s s DESCRIPTIO s s Operates from a Single 3.3V Supply Low Supply Current: ICC = 200µA ICC = 35µA in Driver Disable Mode ICC = 0.2µA in Shutdown Mode ESD Protection Over ±10kV Uses Small Capacitors: 0.1µF 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 LTC1385 is an ultra-low power, 2-driver/2-receiv.

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LTC1385 3.3V Low Power EIA/TIA-562 Transceiver FEATURES s s s s s s s s DESCRIPTIO s s Operates from a Single 3.3V Supply Low Supply Current: ICC = 200µA ICC = 35µA in Driver Disable Mode ICC = 0.2µA in Shutdown Mode ESD Protection Over ±10kV Uses Small Capacitors: 0.1µF 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 LTC1385 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 0.1µF capacitors. The transceiver operates in one of three modes: Normal, Driver Disable or Shutdown. In the Normal mode, ICC 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 ICC drops to 35µA. In the Shutdown mode, everything is turned off and ICC 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. APPLICATI s s S Notebook Computers Palmtop Computers TYPICAL APPLICATI 2-Drivers/2-Receivers with Shutdown and Driver Disable 2 0.1µF 0.1µF 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 (µA) 17 LTC1385 3 7 300k 15 300k 8 14 9 VCC = 3.3V 500 0.1µF 562 OUTPUT 0.1µF QUIESCENT CURRENT (µA) 400 300 200 100 0 –20 SHUTDOWN CURRENT 0 20 40 TEMPERATURE (°C) 60 QUIESCENT CURRENT 562 OUTPUT 562 INPUT 562 INPUT 16 TEST CONDITION: VCC = 3.3V LTC1385 • TA02 U 0.8 0.6 0.4 0.2 0 80 UO UO 1 LTC1385 ABSOLUTE AXI U RATI GS Short-Circuit Duration V + ................................................................... 30 sec V – ................................................................... 30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range .................... 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C Supply Voltage (VCC) ................................................ 5V Input Voltage Driver ....................................... – 0.3V to V CC + 0.3V Receiver ............................................... – 25V to 25V Digital Input ............................... – 0.3V to VCC + 0.3V Output Voltage Driver .................................................... – 25V to 25V Receiver .................................... – 0.3V to VCC + 0.3V PACKAGE/ORDER I FOR ATIO TOP VIEW DRIVER DISABLE C1 + .


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