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LT1781

Features: 10mA Max Supply CurrentESD Protection to IEC 1000-4-2 Level 4 ±15kV Air Gap, ±8kV ContactUses Small Capacitors: 0.1mF120kBaud Operation for RL = 3k, CL = 2500pF250kBaud Operation for RL = 3k, CL = 1000pFOutputs Withstand ±30V Without DamageCMOS Comparable Low Power: 40mWOperates from a S...

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LT1781: Features: 10mA Max Supply CurrentESD Protection to IEC 1000-4-2 Level 4 ±15kV Air Gap, ±8kV ContactUses Small Capacitors: 0.1mF120kBaud Operation for RL = 3k, CL = 2500pF250kBaud Operation for RL = ...

LT1781 Data Sheet

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Part Number:
LT1781
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 10mA Max Supply Current
 ESD Protection to IEC 1000-4-2 Level 4 ±15kV Air Gap, ±8kV Contact
 Uses Small Capacitors: 0.1mF
 120kBaud Operation for RL = 3k, CL = 2500pF
 250kBaud Operation for RL = 3k, CL = 1000pF
 Outputs Withstand ±30V Without Damage
 CMOS Comparable Low Power: 40mW
 Operates from a Single 5V Supply
 Rugged Bipolar Design
 Outputs Assume a High Impedance State When Off or Powered Down
 Meets All RS232 Specifications
 Available With or Without Shutdown
 Absolutely No Latch-up


Application

 Portable Computers
 Battery-Powered Systems
 Power Supply Generator
 Terminals
 Modems


Pinout

Connection Diagram


Specifications

Supply Voltage (VCC) .................................................... 6V
V+ ............................................................................ 13.2V
V ......................................................................... 13.2V
Input Voltage
   Driver ................................................................ V to V+
   Receiver ..................................................... 30V to 30V
   ON/OFF ...................................................... 0.3V to 12V
Output Voltage
   Driver .......................................... V+ 30V to V + 30V
   Receiver ........................................ 0.3V to VCC + 0.3V
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


Description

The LT®1780/LT1781 are dual RS232 driver/receiver pairs with integral charge pump to generate RS232 voltage levels from a single 5V supply. Using only 0.1mF external capacitors, these circuits consume only 40mW of power, and can operate to 120kbaud even while driving heavy capacitive loads. New ESD structures on the chip allow the LT1780/LT1781 to survive ±15kV air gap and ±8kV contact ESD tests per IEC 1000-4-2, eliminating the need for costly TransZorbs® on the RS232 line pins. The LT1780/ LT1781 are fully compliant with EIA RS232 standards. Driver outputs are protected from overload, and can be shorted to ground or up to ±30V without damage. During SHUTDOWN or power-off conditions, driver and receiver outputs are in a high impedance state, allowing line sharing.

The LT1780/LT1781 are direct upgrades to the LT1180A/ LT1181A, LT1280A/LT1281A and LT1381 for applications which require the utmost ESD protection.

The LT1781 is available in 16-pin DIP,SO and SW packages. The LT1780 is supplied in 18-pin DIP and SW packages for applications which require SHUTDOWN.




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