In summary, the LTC2876 and LTC2877 are exceptionally rugged RS485 transceivers that target PROFIBUS-DP systems. Whether transmitting, receiving, in standby or powered off, the LTC2876 and LTC2877 tolerate +/-60V on their bus pins, eliminating common damage due to transmission line faults. Incredibly high ESD protection guarantees the LTC2876 and LTC2877 can withstand ±52kV HBM on the transceiver pins without latchup or damage; all other pins are protected to ±15kV HBM. The devices are also robust to electrical fast transients (or EFTs) and pass the highest level recognized in the IEC standard: level 4, ±2kV, without any external protection. 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. Although PROFIBUS-DP only defines up to 12Mbps data rates, the LTC2876 and LTC2877 operate at up to 20Mbps. The LTC2876 and LTC2877 are functionally very similar; the LTC2877 just adds a 1.65V to 5.5V logic supply, convenient for interfacing to low voltage controllers. The LTC2876 is available in an 8-pin 3mm x 3mm DFN or MSOP package, while the LTC2877 is available in a 10-pin 3mm x 3mm DFN or MSOP package.