LTC1687IS#PBF

LTC1687IS#PBF 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. 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 applications such as high speed RS485/RS422 full duplex transceivers, level translator, backplane transceiver, STS-1/OC-1 data transceiver, signal repeaters.

• Short-circuit protected, thermal shutdown protected
• Driver maintains high impedance in three-state or with power off
• Single 5V supply, -7V to 12V RS485 input common mode range
• Input current is 1µA maximum at (VDD = 5V ±5%)
• Input resistance is 22Kohm minimum at (VDD = 5V ±5%)
• Driver rise/fall time is 3.5ns typical at (RDIFF = 54 ohm, CL1 = CL2 = 100pF)
• Minimum input pulse width is 20ns typical at (VDD = 5V ±5%)
• Maximum data rate is 50Mbps typical at (VDD = 5V ±5%)
• Input capacitance is 3pF typical at (VDD = 5V ±5%)
• Operating temperature range from -40°C to 85°C, 14-lead plastic SO package

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