CD4046 Micropower Phase-locked Loop


CD4046 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4046 has Micropower Phase-locked Loop

CD4046 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD4046 Features

  • Wide supply voltage range: 3.0V to 18V
  • Low dynamic power consumption: 70 µW (typ.) at fo = 10 kHz, VDD = 5V
  • VCO frequency: 1.3 MHz (typ.) at VDD = 10V
  • Low frequency drift: 0.06%/°C at VDD = 10V with temperature
  • High VCO linearity: 1% (typ.)

CD4046 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +18V (Voltage Referenced to VSS Terminals)
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +260oC
  • Power Dissipation (PD)
    • Dual-In-Line 700 mW
    • Small Outline 500 mW

CD4046 Pinout Diagram

CD4046 Pin Description

Pin NoPin NameDescription
1PHASE PulsesPhase Pulses Pin
2PHASE COMP 1 OUTPhase Comparator 1 Output
3COMPARATOR INComparator Input Pin
4VCO OUTOutput Voltage
5INHIBITInhibit Pin
6C1ACapacitor 1A
7C1B Capacitor 1B
8VSSSupply Voltage
9VCO INInput Voltage
10DEMODULATOR OUTDemodulator Output
11R1Resistor 1
12R2Resistor 2
13PHASE COMP 2 OUT Phase Comparator 2 Output
14SIGNAL INSignal Input Pin
15ZENERZener Pin
16VDDDrain Voltage

CD4046 Circuit


  • FM demodulator and modulator
  • Frequency synthesis and multiplication
  • Frequency discrimination
  • Data synchronization and conditioning
  • Voltage-to-frequency conversion
  • Tone decoding
  • FSK modulation
  • Motor speed contro

CD4046 Alternative Equivalent

Download CD4046 Micropower Phase-locked Loop Datasheet from the link given below.