CD4046 datasheet is a CMOS Micropower Phase-Locked Loop. CD4046 consists of a low power, linear voltage-controlled oscillator (VCO) and two different phase comparators having a common signal-input ...

Whilst poring over 4046 phase locked loop data sheets, I noticed yet another subtle useful difference between the the later faster 74HC4046 (diag from NXP data sheet) and the earlier slower CD4046.

Lockdown project: Enter the 9046 – the ultimate ‘4046’ phase-locked loop I had never heard of the 74HCT9046 phase-locked loop before a fortnight ago, and now I own one. To my shame, it was apparently ...