The MM74HC4046 is a low power phase lock loop utilizing advanced silicon-gate CMOS technology to obtain high frequency operation both in the phase comparator and VCO sections.
This document describes the MM74HC4046 CMOS Phase‑Lock Loop, a low‑power PLL that includes a voltage‑controlled oscillator, a source follower, and three phase comparators. It outlines the device’s general operation, pin assignments for various packages, and the functional blocks of the circuit.
The datasheet includes absolute maximum ratings, DC and AC electrical characteristics, typical performance curves, detailed circuit description, and physical dimensions for the SOIC, SOP, TSSOP, and PDIP packages. It also contains ordering information and a life‑support policy disclaimer.
| Supply Voltage (VCC) range | 0.5 V to 7.0 V |
|---|---|
| Maximum VCO operating frequency | 12 MHz (VCC = 4.5 V) |
| Phase comparator I response time | 25 ns |
| Phase comparator II response time | 30 ns |
| Phase comparator III response time | 25 ns |
The device operates from 0.5 V up to 7.0 V supply voltage.
The VCO can operate up to 12 MHz when VCC is 4.5 V.
It contains three phase comparators: Comparator I, Comparator II, and Comparator III.
Comparator I is 25 ns, Comparator II is 30 ns, and Comparator III is 25 ns.