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Original question:

DS16F95QML: Voh max

DS16F95QML: Fluctuations of "Vol" at different temperatures

Patrick Taschner
Prodigy 15 points
Part Number: DS16F95QML

Dear TI Support Team,

currently I am trying to connect the DS16F95QML serial transceiver to the UART I/O of a µC.
My µC I/O pins tolerate a maximum of 3.8 V (VCC1 + 0.5 V , whereas VCC1 = 3.3 V).

It has already been answered in a question that at pin "RO" the maximum voltage "Vol" is 3.6 V (VCC2 - 2*0.7 V , whereas VCC2 = 5 V).
( e2e.ti.com/.../790289 )

Additionally it was said that this maximum voltage depends on the temperature.

Because my application takes place at high fluctuating temperatures, I need to know how the voltage "Vol" will behave between -45° C and +125° C.
Can it happen that the voltage "Vol" exceeds 3.8 V at any time?

Best regards

Patrick

  • 0
    TI__Guru 62930 points

    Patrick,

    On a sample of 6 units from multiple wafers and 3 different wafer lots, the max 5V Voh with light load (900kohm to gnd) varied from approximately 3.6V at 25c to ~ 3.95V at 125c.

    To achieve a Voh of  <= 3.8V at (125c Vcc=5.5), the data suggests that RO would need to be loaded with an IOH of > ~11mA.

    If this answers your question, please click "This Resolved My Issue"
    Regards,
    Wade