The voltage ranges for a logic high and a logic low in RS-232 C standard is
2013
The voltage ranges for a logic high and a logic low in RS-232 C standard is
- A.
Low is 0.0V to 1.8V, High is 2.0V to 5.0V
- B.
Low is -15.0V to -3.0V, High is 3.0V to 15.0V
- C.
Low is 3.0V to 15.0V, High is -3.0V to -15.0V
- D.
Low is 2.0V to 5.0V, High is 0.0V to 1.8V
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Correct answer: C
In the RS-232 C standard, logic levels use inverted voltage polarities. A Logic High (Mark) corresponds to negative voltages from -3V to -15V, while a Logic Low (Space) corresponds to positive voltages from +3V to +15V.