The LTC2862-2865 family provides valuable protection and reliability for a wide variety of RS485/RS422 applications, including industrial control, instrumentation networks and automotive electronics. An extended ±25V input common-mode range and full failsafe operation improve data communications reliability in electrically noisy environments and in the presence of ground loop voltages. This extended common-mode range allows the LTC2862-2865 devices to transmit and receive under harsh conditions that would otherwise cause data errors and possible device damage. Enhanced ESD protection allows these devices to withstand ±15kV (HBM and IEC-1000-4-2 air discharge) on the transceiver pins without latchup or damage; all other pins are protected to ±8kV HBM. Fully symmetric receiver thresholds allow the devices to maintain good duty cycle symmetry at low signal levels and boost receiver noise immunity.
The LTC2862-2865 family is offered in commercial, industrial and automotive temperature grades and available in DFN and SO packages with industry-standard pinouts. Pricing starts at $2.35 each for the 20Mbps half-duplex versions in 1,000 piece quantities. These devices provide a pin-compatible upgrade path from Linear’s half-duplex LT1785 and full-duplex LT1791, 250kbps ±60V fault protected transceivers.
Summary of Features of the LTC2862-65:
• 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 Failsafe Receiver Operation
• Supports up to 256 Nodes
• Separate 1.65V to 5.5V Logic Supply Pin (LTC2865)
• Temperature Range: -40°C to 125°C
• Industry-Standard Pinouts