Buffer/driver meaning: Does the term “buffer/driver” imply the ability to deliver relatively high output current to heavier loads (rather than only low current to light loads)?

Introduction / Context:
Digital “buffers” or “drivers” are used to isolate stages and to increase drive capability. Examples include non-inverting buffers, line drivers, and bus transceivers that must charge/discharge larger capacitive loads or drive multiple inputs.

Given Data / Assumptions:

• Standard logic families (TTL, CMOS) with dedicated buffer/driver variants.
• Use cases: long traces, cables, multiple gate inputs, or LEDs/relays (with proper interfacing).

Concept / Approach:
“Driver” indicates stronger sourcing/sinking capabilities than a basic gate. Buffers often feature paralleled transistor stages or specialized output structures to achieve higher IOH/IOL, maintain signal integrity, and reduce propagation skew when driving heavier loads.

Step-by-Step Solution:

Verification / Alternative check:
Compare datasheets: for example, dedicated line drivers list significantly higher output currents and tighter switching specs than basic logic gates.

Why Other Options Are Wrong:

• “Very low output current only” contradicts the purpose of drivers.
• “Impedance matching only” understates current-drive design.
• “Three-state only” confuses tri-state capability with drive strength; many drivers offer both, but drive strength is the key meaning.

Common Pitfalls:
Forgetting to check thermal limits and transient current surges when multiple drivers switch simultaneously; neglecting controlled edge rates for EMI performance.

Final Answer:
Correct — buffer/driver indicates enhanced output drive capability.