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  • SN65HVD1791: Protection on Y and Z Lines

    TI Thinks Resolved
    Part Number: SN65HVD1791 Hi, Good day. I hope you are doing well. On the SN65HVD1791D, table 7.1 indicates that the A and B lines are protected against over-Voltage, are the Y and Z lines also protected? Thank you. Regards, Cedrick
    • Answered

  • SN65HVD1791:Attenuation of twisted pair line

    Resolved
    Part Number: SN65HVD1791 はじめまして。 私はあなたのアプリケーションマニュアルを読みました。 ( www.ti.com/.../slla036d.pdf) 以下の内容を教えてください。 質問1。ツイストペア線 の減衰と周波数の理論方程式8ページのグラフは、「減衰対周波数」の特性を示しています。 もし、理論式をお持ちの場合は、私に知らせてください。 (他のケーブルメーカーの測定値は一般的にこのグラフと一致しますが、 ケーブルメーカーは理論式を知りませんでした)。 質問2。減衰の等価回路とは何ですか…
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    • Answered

  • SN65HVD1791: Using SN65HVD1791D as Half duplex RS485 instead of Full Duplex

    Resolved
    Part Number: SN65HVD1791 Could SN65HVD1791D be used as Half duplex RS485 by simply shorting A-Y ----> Then using this as 'A' terminal for Half Duplex RS485 B-Z ----> Then using this as 'B' terminal for Half Duplex RS485 or is it not…
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    • Answered

  • SN65HVD1791: Y, Z pin abs max

    Resolved
    Part Number: SN65HVD1791 Hi expert, Could you please let me know the ABS max for Y and Z pins? I think the description in the datasheet is confusing. I don't understand ABS max for HVD1791 Y,Z pin. (datasheet) HVD1785, 86, 91 , 92, 93 A, B pins –7…
    • Resolved

  • SN65HVD1791: SN65HVD1291 full duplex transmit signal steadily drifts higher as data is sent

    Part Number: SN65HVD1791 Having an issue with the output of the SN65HVD1791 steadily climbs to a higher reference voltage as pulses are being sent to the slave device. Reference voltage ramps back down to 0V when pulses stop. This is represented by the…
    • Answered

  • SN65HVD1791: SN65HVD1791

    Resolved
    Part Number: SN65HVD1791 SN65HVD1791 Fault-Protected RS-485 Transceiver (datasheet SLLS872I –JANUARY 2008–REVISED AUGUST 2015): On the datasheet page 22, it says "Use 1-kΩ-to-10-kΩ pullup and pulldown resistors for enable lines to limit noise…
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  • UART RS422 Interface (full Duplex) using SN65HVD1791

    TI Thinks Resolved
    Other Parts Discussed in Thread: SN65HVD1791 Hello, we are looking for a short application note / schematic how to design a uart (5V microcontroller Rx & Tx) to RS422 (one differential pair for Rx, one for Tx) full duplex Interface. We found the SN65HVD1791…

  • SN65HVD1791 running at 3.3V

    Other Parts Discussed in Thread: SN65HVD1791 We are using the SN65HVD1791 with a VCC at 3.3V instead of the recommended 5V. It seems to work fine in the lab. Do you expect us to run into any problems working with this chip at a lower voltage?
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  • SN55LBC180: Can SN55LBC180 be used for RS422 application

    Resolved
    Part Number: SN55LBC180 Other Parts Discussed in Thread: SN65HVD1791 , SN65HVD76 Hi team Q1: Can SN55LBC180 be used for RS422 application? Q2: How to verify if a RS485 transceiver can be compatible with RS422? The attach is the screenshot for the SN65HVD1791…
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  • RE: SN65HVD179: Shorting pin 7

    Resolved
    Hi Arthur, You're right that in general the A and B pins are somewhat independent and voltages on one shouldn't couple through to the other. In the case of a 28-V short-circuit, though, damage to the device would be likely (given that the absolute maximum…

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