ADM3075E Datasheet
3.3 V, ⅛ Load, ±15kV ESD Protected, RS-485/RS-422 Transceiver (Half Duplex, 500 kbps, DE/RE)
3.3 V, ⅛ Load, ±15kV ESD Protected, RS-485/RS-422 Transceiver (Half Duplex, 500 kbps, DE/RE)
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The ADM3075E 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: RS-485 and RS-422.
The devices have a ⅛ unit load receiver input impedance, which allows up to 256 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.
The receiver inputs have a true fail-safe feature, which eliminates the need for external bias resistors and ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ceases.