DESCRIPTION

TheLTC?2862Ais a low power,20Mbpsor250kbpsRS485/RS422 transceiver operating on 3V to 5.5V supplies with ±60V overvoltage fault protection on the interface pins during all modes of operation, including power-down. Improvements were made to the LTC2862 for greater robustness and signal integrity: ±40kV HBM and Level 4 IEC ESD protection on the interface pins; increased resistance to electrical overstress;increased receiver noise immunity; additional receiver noise filtering on the LTC2862A-2; and an improved failsafe function optimized for high speed in the LTC2862A-1 and noise rejection in the LTC2862A-2. Low EMI slew rate limited data transmission is available in the250kbps LTC2862A-2 option, while theLTC2862A-1 operates to 20Mbps.

FEATURES

■ Protected from Overvoltage Line Faults to ±60V

■ 3V to 5.5V Supply Voltage

■ 20Mbps or Low EMI 250kbps Data Rate

■ ±40kV HBM ESD Interface Pins, ±15kV Other Pins

■ Enhanced Receiver and Failsafe Noise Immunity

■ IEC Level 4 ESD and EFT on Interface Pins

■ Extended Common Mode Range: ±25V

■ Guaranteed Failsafe Receiver Operation

■ High Input Impedance Supports 224 Nodes

■ 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

■ Compliant with TIA/EIA-485-A

■ Pin Compatible with LTC2862 and LT?1785

■ Available in DFN and Leaded Packages

APPLICATIONS

■ Supervisory Control and Data Acquisition (SCADA)

■ Industrial Control and Instrumentation Networks

■ Automotive and Transportation Electronics

■ Building Automation, Security Systems and HVAC

■ Medical Equipment

■ Lighting and Sound System Control