RS485:Part a ground wire (more on that later),

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Last updated: May 29, 2019

RS485:Part No rate of 20Mbps.

Three state Rx and Tx outputs available.Full duplex.Current limiting and thermal shutdown for driver overload protection.+/- 15kV ESD Protection.

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—————————————————————————————-RS-485, also known as TIA-485(-A), EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems.Electrical signaling is balanced, and multipoint systems are supported.RS-485 allows multiple devices (up to 32) to communicate at half-duplex on a single pair of wires, plus a ground wire (more on that later), at distances up to 1200 meters (4000 feet).Data is transmitted differentially on two wires twisted together, referred to as a “twisted pair.” The properties of differential signals provide high noise immunity and long distance capabilities. ———————————————————————————————————————-RE Receiver output enable.

RO is enabled when RE is low; RO is high impedance when RE is high. If the Rx enable function is not required,connect RE directly to GND or through a 1k? to 3k? resistor to GND.DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high, and are high impedance when DE is low. If the Tx enablefunction is not required, connect DE to VCC through a 1k? to 3k? resistor.

Supply decap 0.1uF.In point-to-point, or point-to-multipoint (single driver on bus) networks, the main cable should be terminated in itscharacteristic impedance (typically 120?) at the end farthest from the driver. In multi-receiver applications, keep stubsconnecting receivers to the main cable as short as possible.Multipoint (multi-driver) systems require that the main cable be terminated in its characteristic impedance at both ends.Keep stubs connecting a transceiver to the main cable as short as possible.


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