LTC1686CS8#PBF

LTC1686 is a high speed, precision delay, full-duplex RS485 transceiver that can operate at data rates as high as 52Mbps. Device also meets requirements of RS422. A unique architecture provides very stable propagation delays and low skew over a wide common mode and ambient temperature range. 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. Receiver has a fail-safe feature that guarantees a high output state when the inputs are shorted or are left floating. Receiver input resistance remains ≥22K when the device is unpowered or disabled. Applications include high speed RS485/RS422 full duplex transceivers, level translator, backplane transceiver, STS-1/OC-1 data transceiver and signal repeaters.

• Operate from a single 5V supply and draw only 7mA of supply current
• Precision propagation delay over temperature, receiver/driver of 18.5ns ±3.5ns
• High data rate of 52Mbps, low tPLH/tPHL skew:receiver/driver of 500ps typical
• Guaranteed fail-safe operation over the entire common mode range
• High input resistance of ≥22K, even when unpowered
• Short-circuit protected
• Driver maintains high impedance in three-state or with power off
• Pin compatible with LTC490
• Thermal shutdown circuitry protects from excessive power dissipation
• 8 lead plastic SO package, operating temperature range from 0°C to 70°C

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