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LT1139A Datasheet

LT1139A Datasheet

Advanced Low Power 5V RS232 Drivers/Receivers with Small Capacitors
Part No.: LT1139A
Page: 12 Pages
Size: 182 KB
Manufacturer: Linear Technology
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Update Time: 2024-12-18 09:48:54
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LT1139A Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1139ACN#PBF Tube 15   1 24 0°C ~ 70°C 24-Lead PDIP  
LT1139ACSW#PBF Tube 32   1 24 0°C ~ 70°C 24-Lead SOIC  
LT1139ACSW#TRPBF Reel 1000   1 24 0°C ~ 70°C 24-Lead SOIC  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1139A Datasheet(PDF)

LT1139A Datasheet(Picture)

LT1139A Features

  • ESD Protection over ±10kV
  • Uses Small Capacitors: 0.1µF, 0.2µF
  • 1µA Supply Current in SHUTDOWN
  • 120kbaud Operation for RL = 3k, CL = 2500pF
  • 250kbaud Operation for RL = 3k, CL = 1000pF
  • CMOS Comparable Low Power
  • Easy PC Layout: Flowthrough Architecture
  • Rugged Bipolar Design: Absolutely No Latchup
  • Outputs Assume a High Impedance State When Off or Powered Down
  • Improved Protection: RS232 I/O Lines Can Be Forced to ±30V Without Damage
  • Output Overvoltage Does Not Force Current Back into Supplies
  • Available in SO and SSOP Packages

LT1139A Description

The LT1139A series of RS232 drivers/receivers features special bipolar construction techniques which protect the drivers and receivers beyond the fault conditions stipulated for RS232. Driver outputs and receiver inputs can be shorted to ±30V without damaging the device or the power supply generator. In addition, the RS232 I/O pins are resilient to multiple ±10kV ESD strikes. An advanced driver output stage operates up to 250kbaud while driving heavy capacitive loads. Supply current is typically 12mA, competitive with CMOS devices.

Several members of the series include flexible operating mode controls. The DRIVER DISABLE pin disables the drivers and the charge pump, the ON/OFF pin shuts down all circuitry. While shut down, the drivers and receivers assume high impedance output states.

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