DESCRIPTION
The LTC®1686/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.

FEATURES
■ Precision Propagation Delay Over Temperature: Receiver/Driver: 18.5ns ±3.5ns
■ High Data Rate: 52Mbps
■ Low tPLH/tPHL Skew: Receiver/Driver: 500ps Typ
■ –7V to 12V RS485 Input Common Mode Range
■ Guaranteed Fail-Safe Operation Over the Entire Common Mode Range
■ High Input Resistance: ≥22k, Even When Unpowered
■ Short-Circuit Protected
■ Thermal Shutdown Protected
■ Driver Maintains High Impedance in Three-State or with Power Off
■ Single 5V Supply
■ Pin Compatible with LTC490/LTC491
■ 45dB CMRR at 26MHz

APPLICATIONS
■ High Speed RS485/RS422 Full Duplex Transceivers
■ Level Translator
■ Backplane Transceiver
■ STS-1/OC-1 Data Transceiver
■ Signal Repeaters