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msp430fr2633: V input threshold clarification

Eric Steimle
Expert 2290 points
Part Number: MSP430FR2633

In the datasheet it lists two values, a max and a min for the Vinput threshold.  In this case at VCC = 3V then Vit (min) =1.35V and Vit (max) = 2.25V.   I assume this means the worst case Vit across any part that I might buy would be 2.25V correct?   Or is that max number a do not exceed number, as in do not drive more than 2.25V into any input?

Thank you

  • 0
    TI__Guru 56685 points
    Hello Eric,

    The max voltage applied to any pin is specified in section 5.1 of the datasheet (Absolute Maximum Ratings). This voltage is equal to VCC + 0.3V with a cap at 4.1V (max voltage on DVCC). Recommended operating voltage for DVCC is located in section 5.3. The specification for VIT+ in section 5.11.4 defines the min and max values in voltage in which the part recognizes a logical high. This means if VCC is equal to 3V, the Digital I/O can register a logical high at 1.35V, but to ensure across all chips/process/temp, a max voltage of 2.25 V is needed to register as a logical high.

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