LTC1685IS8#PBF

LTC1685 is a high speed, precision delay RS485 transceiver that can operate at data rates as high as 52Mbps. This 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 features 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. It is used in application such as high speed RS485/RS422 transceivers, level translator, backplane transceiver, STS-1/OC-1 data transceiver, fast-20, fast-40 SCSI transceivers etc.

• Driver input-to-output propagation delay is 18.5ns typical at (TA = 25°C, VDD = 5V)
• Driver rise/fall time is 3.5ns typical at (RDIFF = 54 Ohm, CL1 = CL2 = 100pF, TA = 25°C, VDD = 5V)
• Maximum data rate is 50Mbps typical at (TA = 25°C, VDD = 5V)
• Driver output A-to-output B skew is 500ps typical at (RDIFF = 54 Ohm, CL1 = CL2 = 100pF)
• 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
• Operating temperature is -40°C to 85°C
• Package style is 8-lead plastic NSOIC

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party