Terminology check for monostable multivibrator: “A monostable multivibrator is commonly called a two-shot.” Determine if this usage is correct.

Introduction / Context:
Precise terminology matters in digital electronics. Monostable multivibrators are ubiquitous for pulse generation, stretch, and timing intervals. Misnaming them can lead to confusion when selecting parts or reading schematics and datasheets.

Given Data / Assumptions:

• Monostable has one stable state; a trigger produces a single output pulse of defined width.
• Common nickname used in industry: “one-shot.”
• “Two-shot” is not the accepted term for a monostable device.

Concept / Approach:
The name “one-shot” directly reflects behavior: one trigger → one pulse. “Two-shot” would imply two pulses per trigger or two stable states, neither of which describes a monostable. Bistable devices do have two stable states, but they are not called “two-shot.” Therefore, calling a monostable a “two-shot” is incorrect.

Step-by-Step Solution:

Verification / Alternative check:
Datasheets for 74121/74123 explicitly describe “monostable multivibrator (one-shot)” and never use “two-shot.” Application notes reinforce this naming convention across logic families and the 555 timer used in monostable mode.

Why Other Options Are Wrong:

• Correct: Contradicts long-standing terminology.
• Correct only when cascaded / retriggerable: Cascading or retriggering changes pulse width or repetition, not the fundamental name.

Common Pitfalls:
Confusing “two stable states” (bistable) with “two-shot”; assuming retriggerable implies multiple shots per single trigger (it extends or restarts the pulse but does not rename the device).

Final Answer:
Incorrect