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LT1791 Datasheet

LT1791 Datasheet

60V Fault Protected RS485/RS422 Transceivers
Part No.: LT1791
Page: 18 Pages
Size: 313 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-10-24 15:51:20
DataSheet: Download

LT1791 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1791CN#PBF Tube 25 1791 1 14 0°C ~ 70°C 14-Lead PDIP  
LT1791CN#TRPBF Reel   1791 1 14 0°C ~ 70°C 14-Lead PDIP  
LT1791CN#TRMPBF Reel   1791 1 14 0°C ~ 70°C 14-Lead PDIP  
LT1791CS#PBF Tube 55 1791 1 14 0°C ~ 70°C 14-Lead Plastic SO  
LT1791CS#TRPBF Reel 2500 1791 1 14 0°C ~ 70°C 14-Lead Plastic SO  
LT1791CS#TRMPBF Reel 500 1791 1 14 0°C ~ 70°C 14-Lead Plastic SO  
LT1791IN#PBF Tube 25 1791I 1 14 -40°C ~ 85°C 14-Lead PDIP  
LT1791IN#TRPBF Reel   1791I 1 14 -40°C ~ 85°C 14-Lead PDIP  
LT1791IN#TRMPBF Reel   1791I 1 14 -40°C ~ 85°C 14-Lead PDIP  
LT1791IS#PBF Tube 55 1791I 1 14 -40°C ~ 85°C 14-Lead Plastic SO  
LT1791IS#TRPBF Reel 2500 1791I 1 14 -40°C ~ 85°C 14-Lead Plastic SO  
LT1791IS#TRMPBF Reel 500 1791I 1 14 -40°C ~ 85°C 14-Lead Plastic SO  
LT1791HN#PBF Tube 25 1791H 1 14 -40°C ~ 125°C 14-Lead PDIP  
LT1791HN#TRPBF Reel   1791H 1 14 -40°C ~ 125°C 14-Lead PDIP  
LT1791HN#TRMPBF Reel   1791H 1 14 -40°C ~ 125°C 14-Lead PDIP  
LT1791HS#PBF Tube 55 1791H 1 14 -40°C ~ 125°C 14-Lead Plastic SO  
LT1791HS#TRPBF Reel 2500 1791H 1 14 -40°C ~ 125°C 14-Lead Plastic SO  
LT1791HS#TRMPBF Reel 500 1791H 1 14 -40°C ~ 125°C 14-Lead Plastic SO  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1791 Datasheet(PDF)

LT1791 Datasheet(Picture)

LT1791 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

LT1791 Applications

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

LT1791 Description

The LT1791 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 LT1791 is available in 14-lead DIP and SO packages.

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