MC74HC4046ADTR2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC74HC4046ADTR2 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 of -55°C to +125°C. It features low quiescent current consumption and high noise immunity. The component is housed in a TSSOP-16 package and is designed for applications requiring frequency synthesis, modulation, and data synchronization.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates three distinct phase comparators: XOR-based PC1, edge-sensing PC2 with tri-state output, and RS flip-flop based PC3.
• Includes a linear VCO with frequency determined by external R1, R2, and C1 components, plus a buffered DEMOUT pin.
• CMOS inputs compatible with standard CMOS outputs and LSTTL outputs when pullup resistors are used.
• Features an INH (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 conditioning
• Voltage-to-frequency conversion and motor speed control

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix 'TR2' corresponds to the TSSOP-16 tape and reel packaging configuration as listed in the manufacturer's ordering information. Confirm that the 'G' suffix for Pb-Free status is included or excluded based on project requirements, as the base part number may vary in environmental compliance designation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single-chip PLL solution with multiple comparator options is required. Ensure the external loop filter design accommodates the voltage-level outputs of the phase comparators rather than current outputs. Verify that the required VCO frequency range can be achieved using the specified R1, R2, and C1 component ranges defined in the electrical characteristics tables.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the MC74HC4046A family of Phase-Locked Loops. It is functionally similar to the older MC14046 Metal gate CMOS device but utilizes high-performance silicon-gate CMOS technology. The ADTR2 variant specifically denotes the SOIC/TSSOP surface-mount package style with tape and reel shipping, distinguishing it from through-hole PDIP or rail-packaged variants.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Designers should consult the manufacturer's documentation for cross-reference recommendations or verify pin compatibility if considering alternative manufacturers' HC4046 equivalents.