A PIC16F877 powered at 4.9V is required to switch a digital signal line. The load at the end of the line sinks 40mA, and has a load capacitance of 0.1 pF. The load reads a logic high at V=2.5V and a logic low at 1.8V. Required rise/fall times for the signal are comparable to the nominal values for the PIC16F877 I/O pins. Which one of the following statements is NOT correct?

Question

Accepted Answer

The rise and fall times for the signal voltage will be greater than those cited in the data sheet, because the load capacitance is too great.

Answer

A pull-up resistor may be used to maintain the high bus voltage at appropriate levels.

Answer

The PIC16F877 pin will not be able to supply the load current

Answer

The signal voltage will be less than the nominal values, and therefore may not meet the load requirements

Answer

The interface can be implemented if we use a buffer, or switch a transistor in order to drive the load

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A PIC16F877 powered at 4.9V is required to switch a digital signal line. The loa...

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