Digital IC vs Analog IC
Digital IC is an IC which accepts high/low and true/false input and produce discrete level signal outputs. Example: Ripple counter. It takes a digital input clock pulse and produce a number of digital outputs. It does not require external components for its advantages.
Analog IC accepts any analog data as input and produce output at any level. Example: An audio amplifier. It takes analog input i, e; sound and produce an analog output louder sound. More examples – filters. It requires external components for functioning.