Identify the monostable type A one-shot that begins an output pulse on a trigger edge and restarts (extends) the internal pulse timing if another trigger arrives before completion is called ________.

Introduction / Context: Monostable multivibrators (one-shots) generate a single output pulse in response to a trigger. Their behavior upon receiving additional triggers during the active pulse is the key distinction between retriggerable and non-retriggerable types.

Given Data / Assumptions:

• A trigger edge starts the timing cycle.
• Another trigger may occur before the pulse ends.
• We must classify whether the device ignores or extends based on that second trigger.

Concept / Approach: A retriggerable one-shot restarts or extends the pulse width each time a valid trigger is applied during the current pulse, effectively lengthening the total output duration. A non-retriggerable one-shot ignores additional triggers until it times out.

Step-by-Step Solution:

Verification / Alternative check: Review timing diagrams for datasheets like 74HC123 (retriggerable) versus 74HC121 (non-retriggerable).

Why Other Options Are Wrong: “non-retriggerable” does not extend the pulse. “high-level triggered” and “edge-triggered” describe trigger sensitivity, not the retrigger behavior.

Common Pitfalls: Confusing input triggering mode with retrigger capability; failing to account for minimum re-trigger interval and input conditioning.

Final Answer: retriggerable