Select the logic family that is ideally suited for battery-powered or battery-backup applications due to its very low static power consumption.

Introduction / Context:
Portable and battery-backed designs need logic that consumes minimal power when idle and scales well with supply voltage. The choice of logic family directly impacts battery life and thermal performance.

Given Data / Assumptions:

• Goal: minimal static (quiescent) power draw.
• Application: battery or battery-backup operation.
• Candidates: MOS variants and CMOS.

Concept / Approach:
CMOS (complementary MOS) uses complementary p-channel and n-channel devices; ideally, only switching events consume dynamic power, while static power is near zero (aside from leakage). That makes CMOS the dominant choice for low-power digital circuits. Pure NMOS/PMOS families draw static current through load devices, raising idle power.

Step-by-Step Solution:
Compare static power: CMOS ≪ NMOS/PMOS.Consider supply range and noise margins: CMOS scales to low voltages common in battery systems.Select CMOS as the best fit for battery operation.

Verification / Alternative check:
Modern microcontrollers, SoCs, and memories are overwhelmingly CMOS due to power efficiency and integration density.

Why Other Options Are Wrong:
NMOS/PMOS consume higher static power; “MOS” is non-specific; BiCMOS can optimize speed/analog features but not minimum static power.

Common Pitfalls:
Overlooking leakage in deep-submicron CMOS; although nonzero, it remains far below the static currents of classic NMOS/PMOS logic families.

Final Answer:
CMOS