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uA9637AC Data rate

Angela Brock
Intellectual 480 points
Other Parts Discussed in Thread: UA9637A

Hi,

I am wondering the data rate of the uA9637AC as I cannot find it in the data sheet.

Thank you,

Angela

  • 0
    TI__Guru 71526 points

    Hello Angela,

      Yes, rather old datasheet.  If you look in the Standard Interface Guide (http://www.ti.com/lit/sg/slyt605/slyt605.pdf ), page 4 shows 10Mbps:

    PartNumber    #ofTX/RX    SupplyVoltage(s)(V)    SamplingRate(Mbps)    ESD (kV)     Icc(max)(mA)    Footprint    RS422    RS423

    UA9637A       0TX/2RX          5                                       10                          2                      50              uA9637        Yes       Yes     

    ~Leonard

     

  • 0
    TI__Guru 71526 points

    just a quick follow-up to relate the Selection Guide info to the datasheet. 

    The maximum data rate is dependent on several factors, such as propagation delay matching, input sensitivity.  A device can have a high maximum signaling rate if the propagation delays from low-to-high and high-to-low are matched, the input is fast enough to respond to the fast data rate, and the output edge rate does not interfere with the low and high-level steady states. The worst Tpd stated in the datasheet is 25nsec for both Tphl and Tplh.  This means the device can ideally respond to the transitions up to 40MHz.  

     

    Here's a great App Note - Signaling Rate: http://www.ti.com/litv/pdf/slla098a .  As well, a helpful reference, see this app note, esp page 57 that explains fMAX: http://www-s.ti.com/sc/techlit/szza036.pdf .