Which of the following correctly describes a characteristic of CMOS logic?

The characteristic that correctly describes CMOS logic is that it can operate at lower voltage levels. CMOS (Complementary Metal-Oxide-Semiconductor) technology is designed to consume significantly less power than other logic families, such as TTL (Transistor-Transistor Logic). This lower power consumption is particularly notable during standby mode, where CMOS devices can draw virtually no current.

CMOS circuits are capable of operating effectively at lower supply voltages, which enhances their efficiency and makes them suitable for battery-powered devices and modern integrated circuits. Typical operating voltages for CMOS devices can range from about 3 volts down to sub-1 volt levels, depending on the specific technology used. This flexibility in voltage allows for greater integration and energy efficiency in modern electronic systems.

In contrast, while CMOS can achieve competitive switching speeds, these speeds are typically not higher than those of TTL at all frequencies. TTL can be faster in certain cases, especially in applications that don't prioritize power efficiency over speed. Furthermore, the assertion regarding required supply voltage specificity for CMOS is generally broader than ±5% of 5 volts, as CMOS technology may operate at varying voltages based on specific design requirements.