The LTC1685 is a high speed, precision delay RS485 transceiver that can operate at data rates as high as 52Mbps. The device also meets 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 LTC1685 RS485 transceiver guarantees receiver fail-safe operation over the entire common mode range (–7V to 12V). Input resistance will remain ≥22k when the device is unpowered or disabled.The LTC1685 operates from a single 5V supply and draws only 7mA of supply current.ApplicationsHigh Speed RS485/RS422 TransceiversLevel TranslatorBackplane TransceiverSTS-1/OC-1 Data TransceiverFast-20, Fast-40 SCSI Transceivers