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XRT4500CV Datasheet(PDF) 28 Page - Exar Corporation |
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XRT4500CV Datasheet(HTML) 28 Page - Exar Corporation |
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28 / 99 page  áç áç áç áç XRT4500 MULTIPROTOCOL SERIAL NETWORK INTERFACE IC REV. 1.0.7 25 PIN DESCRIPTIONS PIN # Signal DTE MODE DCE MODE TYPE FUNCTION 78 RX1A RXDA TXDA I Receiver 1 – Negative Data Differential Input from Line 79 RX1B RXDB TXDB I Receiver 1 – Positive Data Differential Input from Line The exact function of this input pin depends upon whether the XRT4500 is operating in the DCE or DTE Mode. This input pin, along with “RX1A” (pin 78) will accept a line signal in either the V.35, V.11, V.28/EIA-232 or V.10 electrical format. Receiver 1 will then convert this line signal into a CMOS level binary data stream, and will output this data (to the Terminal Equipment) via the “RX1D” output pin (pin 1). DCE Mode – Receive Data (RXD) – Negative Polarity Input Line Signal 80 EN_TERM I Enable Input Termination for Receiver 1, 2, 3, in V.11 Mode. Internal 20k Ω pull-down to ground. |
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