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LT1785A Datasheet

LT1785A Datasheet

60V Fault Protected RS485/RS422 Transceivers
Part No.: LT1785A
Page: 18 Pages
Size: 313 KB
Manufacturer: Linear Technology
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Views: 2
Update Time: 2023-10-24 15:35:39
DataSheet: Download

LT1785A Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT1785ACN8#PBF Tube 50 1785A 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785ACN8#TRPBF Reel   1785A 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785ACN8#TRMPBF Reel   1785A 1 8 0°C ~ 70°C 8-Lead PDIP  
LT1785ACS8#PBF Tube 100 1785A 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785ACS8#TRPBF Reel 2500 1785A 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785ACS8#TRMPBF Reel 500 1785A 1 8 0°C ~ 70°C 8-Lead Plastic SO  
LT1785AIN8#PBF Tube 50 1785AI 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785AIN8#TRPBF Reel   1785AI 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785AIN8#TRMPBF Reel   1785AI 1 8 -40°C ~ 85°C 8-Lead PDIP  
LT1785AIS8#PBF Tube 100 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AIS8#TRPBF Reel 2500 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AIS8#TRMPBF Reel 500 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AHN8#PBF Tube 50 1785AH 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785AHN8#TRPBF Reel   1785AH 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785AHN8#TRMPBF Reel   1785AH 1 8 -40°C ~ 125°C 8-Lead PDIP  
LT1785AHS8#PBF Tube 100 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785AHS8#TRPBF Reel 2500 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785AHS8#TRMPBF Reel 500 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785AIS8#WPBF Tube 100 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AIS8#WTRPBF Reel 2500 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AIS8#WTRMPBF Reel 500 1785AI 1 8 -40°C ~ 85°C 8-Lead Plastic SO  
LT1785AHS8#WPBF Tube 100 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785AHS8#WTRPBF Reel 2500 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
LT1785AHS8#WTRMPBF Reel 500 1785AH 1 8 -40°C ~ 125°C 8-Lead Plastic SO  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT1785A Datasheet(PDF)

LT1785A Datasheet(Picture)

LT1785A 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
  • Guaranteed High Receiver Output State for Floating, Shorted or Inactive Inputs (LT1785A)
  • 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)

LT1785A Applications

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

LT1785A 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 LT1785A devices have “fail-safe” receiver inputs to guarantee a receiver output high for shorted, open or inactive data lines. On-chip ESD protection eliminates need for external protection devices.

The LT1785A are available in 8-lead DIP and SO packages.

LT1785A Datasheet Related Parts

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