LTC1687CS#PBF

LTC1687 is a high speed, precision delay, full-duplex 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 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. It is used in application such as high speed RS485/RS422 full duplex transceivers, level translator, backplane transceiver, STS-1/OC-1 data transceiver, signal repeaters etc.

• Driver input-to-output propagation delay is 18.5ns typical at ( RDIFF = 54 ohm, VDD = 5V)
• Driver output A-to-output B skew is 500ps typical at ( RDIFF = 54 ohm, CL1 = CL2 = 100pF)
• –7V to 12V RS485 input common mode range
• Guaranteed fail-safe operation over the entire common mode range
• Short-circuit protected, thermal shutdown protected
• Driver maintains high impedance in three-state or with power off
• Single 5V supply, supply current is 7mA typical at (VDD = 5V ±5%)
• Receiver input common mode rejection ratio is 45dB typical at (VCM = 2.5V, f = 26MHz)
• Operating temperature is 0°C to 70°C
• Package style is 14-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