DESCRIPTION

The LTC®1685 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.

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 Receiver Operation Over the Entire Common Mode Range
■ High Receiver 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 LTC485
■ 45dB CMRR at 26MHz

APPLICATIONS

■ High Speed RS485/RS422 Transceivers
■ Level Translator
■ Backplane Transceiver
■ STS-1/OC-1 Data Transceiver
■ Fast-20, Fast-40 SCSI Transceivers