DESCRIPTION
   The LTC®1688/LTC1689 are ultrahigh speed, differential bus/line drivers that can operate at data rates up to 100Mbps. Propagation delay is guaranteed at 8ns ±4ns over the full operating temperature range. These devices operate over the full RS485 common mode range (–7V to 12V), and also meet RS422 requirements.

FEATURES
■ Ultrahigh Speed: 100Mbps
■ Guaranteed Propagation Delay: 8ns ±4ns
   Over Temperature
■ Low Channel-to-Channel Skew: 500ps Typ
■ Hot SwapTM Capable
■ 50Mbps Operation with VDD = 3V
■ Low tPLH/tPHL Skew: 500ps Typ
■ Driver Outputs Maintain High Impedance in
   Three-State or with Power Off
■ Short-Circuit Protected: 3mA Typ Output Current
   for an Indefinite Short
■ Thermal Shutdown Protected
■ Single 5V or 3V Supply
■ Pin Compatible with LTC486/LTC487

APPLICATIONS
■ High Speed RS485 Twisted-Pair Drivers
■ High Speed Backplane Drivers
■ Complementary Clock Drivers
■ STS-1/OC-1 Data Drivers
■ SCSI Drivers