TTL internal design: The output stage of a standard TTL logic gate uses a special push-pull arrangement commonly known as ________.

Introduction / Context:
TTL logic families employ characteristic internal structures. Inputs often use multiemitter transistors, and outputs typically employ a push-pull stage that can both source and sink current quickly. This arrangement improves switching speed and provides stronger drive for connected loads.

Given Data / Assumptions:

• A standard (non–open-collector) TTL gate is considered.
• We are naming the output topology.
• Focus is on the common push-pull form rather than special variants.

Concept / Approach:
The TTL push-pull output stage is called a totem-pole because two transistors are stacked vertically between Vcc and ground. One acts as an active pull-up for logic HIGH; the other acts as an active pull-down for logic LOW. Internal diodes or timing networks reduce shoot-through by preventing both from strongly conducting simultaneously.

Step-by-Step Solution:

Verification / Alternative check:
Review typical 7400-series internal diagrams; they show the characteristic stacked transistors in the output stage and label it as totem-pole.

Why Other Options Are Wrong:

• Multiemitter: Refers to input transistor structure, not output.
• MSI/DIP: MSI is an integration level; DIP is a package.
• Open-drain: CMOS term; TTL equivalent is open-collector, different from totem-pole.

Common Pitfalls:
Confusing input architecture (multiemitter) with output topology; conflating package types with internal circuits.

Final Answer:
Totem-pole