LTC1686 Datasheet | Linear Technology

LTC1686/LTC1687 52Mbps Precision Delay RS485 Fail-Safe Transceivers Features s s s DESCRIPTION The LTC®1686/LTC1687 are high speed, precision delay, full-duplex RS485 transceivers that can operate at data rates as high as 52Mbps. The devices also meet the requirements of RS422. A unique architecture provides very stable propagation delays and low skew over a wide mon mode and ambient temperature range. The driver and receiver feature three-state outputs, with disabled driver outputs maintaining high impedance over the entire mon 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. The LTC1686/LTC1687 RS485 transceivers guarantee receiver fail-safe operation over the entire mon mode range (- 7V to 12V). Receiver input resistance remains ≥ 22k when the device is unpowered or disabled. The LTC1686/LTC1687 operate from a single 5V supply and draw only 7m A of supply current. , LTC and LT are registered trademarks of Linear Technology Corporation. s s s s s s s s s Precision Propagation Delay Over Temperature: Receiver/Driver: 18.5ns ±3.5ns High Data Rate: 52Mbps Low t PLH/t PHL Skew: Receiver/Driver: 500ps Typ - 7V to 12V RS485 Input mon Mode Range Guaranteed Fail-Safe Operation Over the Entire mon Mode Range High 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 patible with LTC490/LTC491 45d B CMRR at 26MHz U APPLICATIONS s s s s s High Speed RS485/RS422 Full Duplex Transceivers Level Translator Backplane Transceiver STS-1/OC-1 Data Transceiver Signal Repeaters TYPICAL APPLICATION LTC1686 5 D 3...