Modern electronic component distributors often further sub-categorize the huge variety of integrated circuits now available:
Digital ICs are further sub-categorized as logic ICs, memory chips, interface ICs (level shifters, serializer/deserializer, etc.), Power Management ICs, and programmable devices.
Analog ICs are further sub-categorized as linear ICs and RF ICs.
mixed-signal integrated circuits are further sub-categorized as data acquisition ICs (including A/D converters, D/A converter, digital potentiometers) and clock/timing ICs.