74HCT4046AD,118

Clock Generators, PLLs, Frequency Synthesizers Overview

The Nexperia 74HCT4046AD,118 is a high-speed Si-gate CMOS phase-locked loop (PLL) circuit housed in a 16-lead SO plastic small outline package (SOT109-1). It integrates a linear Voltage Controlled Oscillator (VCO), three distinct phase comparators (PC1: EXCLUSIVE-OR, PC2: Edge-triggered J-K flip-flop, PC3: Edge-triggered RS flip-flop), and an operational amplifier buffer. The device operates with a VCO supply voltage range of 3.0 V to 6.0 V and a digital section range of 2.0 V to 6.0 V. At VCC = 4.5 V, the typical center frequency reaches up to 17 MHz. It features low power consumption, excellent VCO linearity, and low frequency drift.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates three selectable phase comparators for flexible loop configuration
• Features a linear Voltage Controlled Oscillator (VCO) with low frequency drift
• Includes VCO-Inhibit control for ON/OFF keying and standby power reduction
• Provides zero voltage offset due to operational amplifier buffering

Clock Generators, PLLs, Frequency Synthesizers Applications

• FM modulation and demodulation
• Frequency synthesis and multiplication
• Tone decoding
• Data synchronization and conditioning
• Motor-speed control

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix '118' corresponds to the specified SOT109-1 (SO16) package variant. Confirm that the HCT logic family input levels are compatible with the target system's voltage domains. Ensure environmental specifications meet the required operating temperature range of -40 °C to +125 °C for the intended application environment.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when TTL-compatible inputs are required for the phase comparator sections. Choose between PC1, PC2, or PC3 based on specific capture range and lock range requirements. Verify external resistor and capacitor values against the recommended operating conditions to achieve the desired VCO center frequency and stability characteristics.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the 74HCT4046A series, which shares functional block diagrams with the 74HC4046A but differs in input logic level specifications. The AD suffix indicates the SO16 package type. It serves as a complete PLL solution integrating oscillation, comparison, and filtering interfaces within a single CMOS integrated circuit.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers include 74HC4046AD,118 and 74HC4046APW,118.