MC74HC4046ANG

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC74HC4046ANG is a high-performance silicon-gate CMOS phase-locked loop (PLL) manufactured by onsemi. It integrates three phase comparators, a voltage-controlled oscillator (VCO), and a unity gain operational amplifier (DEMOUT). The device operates within a supply voltage range of 3.0 V to 6.0 V and supports an operating temperature range from -55°C to +125°C. It features low quiescent current consumption and high noise immunity. The component is housed in a 16-pin Plastic Dual In-Line Package (PDIP) with the N suffix.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates Phase Comparator 1 (XOR gate), Phase Comparator 2 (digital memory network), and Phase Comparator 3 (edge-triggered sequential detector).
• Includes a linear Voltage-Controlled Oscillator (VCO) with a center frequency capability up to 13 MHz at 6.0 V.
• Features a unity gain op-amp output (DEMOUT) for buffering the VCO input signal without loading effects.
• Provides an inhibit input to disable the VCO and op-amps for minimized standby power consumption.

Clock Generators, PLLs, Frequency Synthesizers Applications

• FM and FSK modulation and demodulation circuits.
• Frequency synthesis and multiplication systems.
• Tone decoding and data synchronization applications.
• Voltage-to-frequency conversion modules.
• Motor speed control loops.

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify package authenticity and lead times through authorized distributors. Confirm RoHS compliance status as the 'G' suffix indicates Pb-Free packaging, while standard versions may vary. Check for end-of-life notices or obsolescence warnings prior to finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single-chip PLL solution with multiple comparator options is required. Ensure external R1, R2, and C1 values fall within the specified ranges (R: 3.0 kΩ to 300 kΩ; C: 40 pF to no limit) to maintain linearity and stability. Consider the PDIP-16 package constraints for thermal dissipation if operating at maximum voltage.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is functionally similar to the older MC14046 metal-gate CMOS device but offers improved operating speeds comparable to LSTTL. The MC74HC4046A is the base model, with the ANG designation specifying the PDIP-16 package and Pb-Free manufacturing process.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes include the MC74HC4046AD (SOIC-16) and MC74HC4046ADT (TSSOP-16) from onsemi. Other manufacturers such as NXP (74HC4046AN) and Texas Instruments (CD74HC4046) offer pin-compatible alternatives within the same logic family.