The LTC1686/LTC1687 are high speed, precision delay, full-duplex RS485 transceivers that can operate at data rates as high as 52Mbps. The devices also meet the requirements of RS422.A unique architecture provides very stable propagation delays and low skew over a wide common mode and ambient temperature range.The driver and receiver feature three-state outputs, with disabled driver outputs maintaining high impedance over the entire common mode range. A short-circuit feature detects shorted outputs and substantially reduces driver output current. A similar feature also protects the receiver output from short circuits. Thermal shutdown circuitry protects from excessive power dissipation.The receiver has a fail-safe feature that guarantees a high output state when the inputs are shorted or are left floating. The LTC1686/LTC1687 RS485 transceivers guarantee receiver fail-safe operation over the entire common mode range (–7V to 12V). Receiver input resistance remains ≥22k when the device is unpowered or disabled.The LTC1686/LTC1687 operate from a single 5V supply and draw only 7mA of supply current.ApplicationsHigh Speed RS485/RS422 Full Duplex TransceiversLevel TranslatorBackplane TransceiverSTS-1/OC-1 Data TransceiverSignal Repeaters