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ESD保护的半和全双工RS-485/RS-422收发器ADM3483E/ADM3486E
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The ADM3483E/ADM3486E/ADM3488E/ADM3490E/ ADM3491E are 3.3 V， low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission， and they comply with TIA/EIA standards RS485 and RS-422. The ADM3483E/ADM3486E are half-duplex transceivers that share differential lines and have separate enable inputs for the driver and receiver. The full-duplex ADM3488E/ ADM3490E/ADM3491E transceivers have dedicated differential line driver outputs and receiver inputs. The ADM3491E also features separate enable inputs for the driver and receiver. The devices have a 12 kΩ receiver input impedance， which allows up to 32 transceivers on a bus. Because only one driver should be enabled at any time， the output of a disabled or powered-down driver is tristated to avoid overloading the bus.
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