Catalog
±60V Fault Protected 3V to 5.5V RS485/RS422 Transceivers
Key Features
• Protected from Overvoltage Line Faults to ±60V
• 3V to 5.5V Supply Voltage
• 20Mbps or Low EMI 250kbps Data Rate
• ±15kV ESD Interface Pins, ±8kV All Other Pins
• Extended Common Mode Range: ±25V
• Guaranteed Fail-safe Receiver Operation
• High Input Impedance Supports 256 Nodes
• 1.65V to 5.5V Logic Supply Pin (VL) for Flexible Digital Interface (LTC2865)
• MP-Grade Option Available (–55°C to 125°C)
• Fully Balanced Differential Receiver Thresholds for Low Duty Cycle Distortion
• Current Limited Drivers and Thermal Shutdown
• Pin Compatible with LT1785 and LT1791
• Available in DFN and Leaded Packages
Description
AI
The LTC2862/LTC2863/LTC2864/LTC2865 are low power, 20Mbps or 250kbps RS485/RS422 transceivers operating on 3V to 5.5V supplies that feature ±60V overvoltage fault protection on the data transmission lines during all modes of operation, including power-down. Low EMI slew rate limited data transmission is available in a logic-selectable 250kbps mode in the LTC2865 and in 250kbps versions of the LTC2862-LTC2864. Enhanced ESD protection allows these parts to withstand ±15kV HBM on the transceiver interface pins without latch-up or damage.Extended ±25V input common mode range and full fail-safe operation improve data communication reliability in electrically noisy environments and in the presence of large ground loop voltages.Part NumberDuplexEnablesMax Data RateVLPinLTC2862-1HalfYes20MNoLTC2862-2HalfYes250kNoLTC2863-1FullNo20MNoLTC2863-2FullNo250kNoLTC2864-1FullYes20MNoLTC2864-2FullYes250kNoLTC2865FullYes20M/250kYesApplicationsSupervisory Control and Data Acquisition (SCADA)Industrial Control and Instrumentation NetworksAutomotive and Transportation ElectronicsBuilding Automation, Security Systems and HVACMedical EquipmentLighting and Sound System Control