75176, LTC485 RS485 line transceiver. Receiver: Transmitter: +----------+ +---------------+ +---------------+ Y |1 +--+ 8| VCC | A-B |/OE| Y | | D |DEN| A | B | /OE |2 7| B |-------+---+---| |---+---+---+---| DEN |3 75176 6| A |>+200mV| 0 | 1 | | 0 | 1 | 0 | 1 | D |4 5| GND |<-200mV| 0 | 0 | | 1 | 1 | 1 | 0 | +----------+ | X | 1 | Z | | X | 0 | Z | Z | +---------------+ +---------------+ [This information is part of the GIICM]