In summary, the Analog Devices LTC2870 and LTC2871 are high-speed, robust RS232/485 multi-protocol transceivers. These devices offer a unique feature that allows automatic integrated termination resistor selection and can operate in half- or full-duplex RS485 modes. Data rates of 20Mbps in the RS485 mode and 500kbps when in the RS232 mode provide faster data transfer between nodes than previous generations, which increases overall system speed and performance. ESD protection of ±26kV for the LTC2870 and ±16kV for the LTC2871 means that the transceivers can survive high ESD discharges without affecting system performance. Because of the automatic termination selection, if the system configuration is changed, a technician does not need to physically add or remove termination resistors. Since the termination resistors are on-chip, PC board space is reduced and fewer external components are necessary. Both the LTC2870 and LTC2871 have a wide input voltage range, which allows these devices to be used in 3V systems. Failsafe operation has been improved; the receiver output will exhibit a high logic state if the inputs are shorted, left open, or terminated but not driven. The LTC2870 and LTC2871 include a boost regulator to generate a 7V supply for the RS232 protocol which requires an external inductor.