4046 IC CMOS Phase-Locked Loop (PLL) with VCO

4046 IC CMOS Phase-Locked Loop (PLL) with VCO

The CD4046BE is a versatile CMOS integrated circuit that combines a Phase-Locked Loop (PLL) system with a Voltage-Controlled Oscillator (VCO) and two independent phase comparators. It plays a key role in frequency synthesis, demodulation, clock recovery, and tone decoding. Its design supports both analog and digital applications, making it a valuable component for engineers and hobbyists alike.

This IC contains two phase comparators: one exclusive OR logic-based (PC1) and the other edge-triggered SR flip-flop type (PC2), giving designers flexibility depending on the application’s precision and noise immunity requirements. The VCO can operate over a wide range of frequencies depending on the external resistor and capacitor network connected to the appropriate pins. The chip ensures stable lock-in and fast response, which makes it ideal for applications like FM demodulation, signal synchronization, and motor speed control.

Key Features

• Includes VCO and two phase comparators

• Operating voltage range: 3V to 15V

• Low power CMOS technology

• High noise immunity

• Wide frequency range (up to several MHz)

• Adjustable VCO range with external components

• Compatible with TTL and CMOS logic levels

• Available in 16-pin DIP package

Pin Configuration (16-Pin DIP Package)

Applications

• Frequency demodulation (FM/FSK)

• Clock/data recovery circuits

• Frequency multiplication/division

• Signal synchronization

• Tone decoders

• Phase/frequency detectors

• Motor speed control systems