IC monostable multivibrator timing behavior At the falling edge of the trigger, the monostable output goes HIGH for a time interval determined primarily by what parameter(s)?

Introduction / Context:
A monostable multivibrator produces a single output pulse of fixed width for each valid trigger. In common IC monostables (including 555-based configurations), the pulse width is governed by an RC timing network rather than the trigger amplitude or repetition rate, provided the trigger meets logic-level requirements.

Given Data / Assumptions:

• Edge-triggered monostable, output HIGH after a falling trigger edge.
• Timing set by resistor R and capacitor C.
• Trigger pulses are valid logic levels and narrow compared to the output pulse.

Concept / Approach:
The monostable timing interval T is approximately proportional to R * C for a wide range of supply voltages and within component tolerance limits. The trigger only initiates the cycle; it does not set its duration once initiated.

Step-by-Step Solution:

Verification / Alternative check:
Datasheets provide formulas for T versus R and C, showing near-linear scaling across practical ranges.

Why Other Options Are Wrong:

• Amplitude of the input trigger: once above logic threshold, amplitude does not set T.
• Frequency of the input trigger: frequency affects repetition, not individual pulse width.
• Magnitude of the dc supply: within limits it has minor effect compared to RC.

Common Pitfalls:
Relying on trigger width or level to control pulse width instead of properly sizing R and C.

Final Answer:
value of the RC timing components