厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Linear
类别：多协议收发器
类别：微功率比较器
类别：专用比较器
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特点Precision Propagation Delay Over Temperature: Receiver/Driver: 18.5ns ?3.5nsHigh Data Rate: 52MbpsLow tPLH/tPLH Skew: Receiver/Driver: 500ps Typ?7V to 12V RS485 Input Common Mode RangeGuaranteed Fail-Safe Operation Over the Entire Common Mode RangeHigh Input Resistance: ?22k, Even When UnpoweredShort-Circuit ProtectedThermal Shutdown ProtectedDriver Maintains High Impedance in Three-State or with Power OffSingle 5V SupplyPin Compatible with LTC490/LTC49145dB CMRR at 26MHz典型应用典型应用描述描述 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 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. The LTC1686/LTC1687 RS485 transceivers guarantee receiver fail-safe operation over the entire common 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 7mA of supply current.