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LT1785 Datasheet

LT1785 Datasheet

60V Fault Protected RS485/RS422 Transceivers
Part No.: LT1785
Page: 18 Pages
Size: 313 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-10-24 15:11:26
DataSheet: Download

LT1785 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1785CN8#PBF Tube 50 1785 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785CN8#TRPBF Reel   1785 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785CN8#TRMPBF Reel   1785 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785CS8#PBF Tube 100 1785 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785CS8#TRPBF Reel 2500 1785 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785CS8#TRMPBF Reel 500 1785 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785IN8#PBF Tube 50 1785I 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785IN8#TRPBF Reel   1785I 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785IN8#TRMPBF Reel   1785I 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785IS8#PBF Tube 100 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785IS8#TRPBF Reel 2500 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785IS8#TRMPBF Reel 500 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785HN8#PBF Tube 50 1785H 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785HN8#TRPBF Reel   1785H 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785HN8#TRMPBF Reel   1785H 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785HS8#PBF Tube 100 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785HS8#TRPBF Reel 2500 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785HS8#TRMPBF Reel 500 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785IS8#WPBF Tube 100 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785IS8#WTRPBF Reel 2500 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785IS8#WTRMPBF Reel 500 1785I 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785HS8#WPBF Tube 100 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785HS8#WTRPBF Reel 2500 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785HS8#WTRMPBF Reel 500 1785H 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1785 Datasheet(PDF)

LT1785 Datasheet(Picture)

LT1785 Features

  • Protected from Overvoltage Line Faults to ±60V
  • Pin Compatible with LTC485 and LTC491
  • High Input Impedance Supports Up to 128 Nodes
  • No Damage or Latchup to ESD
    • IEC-1000-4-2 Level 4: ±15kV Air Discharge
    • IEC-1000-4-2 Level 2: ±4kV Contact Discharge
  • Controlled Slew Rates for EMI Emissions Control
  • Outputs Assume a High Impedance When Off or Powered Down
  • Drives Low Cost, Low Impedance Cables
  • Short-Circuit Protection on All Outputs
  • Thermal Shutdown Protection
  • Guaranteed Operation to 125°C
  • AEC-Q100 Qualified for Automotive Applications (LT1785#W)

LT1785 Applications

  • Industrial Control Data Networks
  • CAN Bus Applications
  • HVAC Controls 

LT1785 Description

The LT1785 are half-duplex and full-duplex differential bus transceivers for RS485 and RS422 applications which feature on-chip protection from overvoltage faults on the data transmission lines. Receiver input and driver output pins can withstand voltage faults up to ±60V with respect to ground with no damage to the device. Faults may occur while the transceiver is active, shut down or powered off.

Data rates to 250kbaud on networks of up to 128 nodes are supported. Controlled slew rates on the driver outputs control EMI emissions and improve data transmission integrity on improperly terminated lines. Drivers are specified to operate with inexpensive cables as low as 72Ω characteristic impedance.

The LT1785 is available in 8-lead DIP and SO packages.

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