Classifying a latch among multivibrators What type of multivibrator is a latch, considering its number of stable states and behavior?

Introduction / Context:
Multivibrators are grouped by stability: astable (no stable state), monostable (one stable state), and bistable (two stable states). Latches and flip-flops store one bit by holding one of two stable outputs until inputs command a change.

Given Data / Assumptions:

• A latch can remain indefinitely in either of two states without a clock.
• Inputs such as S/R or D with enable determine which state is captured.
• No internal oscillation occurs in steady conditions.

Concept / Approach:
A device is bistable if it has two stable equilibrium points and transitions between them on command. An SR latch made from cross-coupled gates, or a gated D latch, satisfies this definition perfectly: it “remembers” a 0 or 1 until directed otherwise. Hence, a latch is a bistable multivibrator.

Step-by-Step Solution:
Consider SR latch: it can be SET or RESET and stay there.Enable-controlled (level) latches pass input while enabled, then hold when disabled.Both behaviors indicate two stable states and memory retention.Therefore, the correct classification is bistable.

Verification / Alternative check:
Block diagrams and textbooks consistently identify latches and flip-flops as bistable elements.

Why Other Options Are Wrong:
Astable oscillates continuously (no stable state). Monostable requires a trigger to leave and then return to its single stable state. “Depends on type” is misleading; regardless of SR or D style, latches are bistable.

Common Pitfalls:
Confusing latches with one-shots or oscillators; overlooking that transparency during enable does not negate bistability when disabled.

Final Answer:
Bistable