Question

In IC 555 timer, three \(5k\Omega\) internal resistors act as voltage divider, which provides bias voltage to the upper comparator and to the lower comparator in the order of (in \(V_{CC}\)).

• A. \[ \frac{2}{3},\frac{1}{3} \]
• B. \[ \frac{1}{3},\frac{1}{3} \]
• C. \[ \frac{1}{3},\frac{2}{3} \]
• D. \[ \frac{2}{5},\frac{1}{5} \]

Hint:

The trigger comparator of a 555 timer works at \[ \frac{1}{3}V_{CC} \] and the threshold comparator works at \[ \frac{2}{3}V_{CC}. \]

Answer 1

The Correct Option is A