CD74HC4046APWRG4

Overview

The CD74HC4046APWRG4 is a high-speed CMOS logic phase-locked loop (PLL) integrated circuit manufactured by Texas Instruments. It integrates a linear voltage-controlled oscillator (VCO) and three distinct phase comparators within a single circuit. The device operates on a supply voltage ranging from 2 V to 6 V and supports a maximum input frequency of 38 MHz. It is housed in a 16-pin TSSOP package designed for surface-mount technology applications. The component functions across an extended temperature range, supporting operation from -55 °C to +125 °C.

Feature Summary

• Integrates a linear voltage-controlled oscillator with high linearity achieved through operational amplifier techniques.
• Includes three selectable phase comparators for flexible loop configuration.
• Features self-biasing input circuits to maintain small voltage signals within the linear region.

Applications

• Frequency synthesis systems
• FM demodulation circuits
• Motor speed control loops

Procurement Notes

Verify the specific ordering suffix 'G4' against the manufacturer's current documentation to confirm compliance status and pinout compatibility. Ensure the selected package variant matches the intended PCB footprint requirements. Cross-reference the datasheet revision history to validate any changes in electrical characteristics or recommended operating conditions prior to final procurement decisions.

Selection Notes

Select this component when a wide supply voltage range and high-speed CMOS performance are required for PLL designs. The inclusion of multiple phase comparators allows for optimization of lock time and jitter performance. Verify that the 38 MHz maximum frequency meets the system's signal processing needs and that the TSSOP package fits the available board space constraints.

Part Context

This part belongs to the CD74HC4046A series of high-speed silicon-gate CMOS logic devices. It maintains pin compatibility with the legacy CD4046B series while offering improved switching speeds. The device is part of Texas Instruments' broader portfolio of timing and clock generation integrated circuits designed for general-purpose digital and analog signal processing applications.

Replacement Considerations

CD74HC4046APWR

FAQ

What types of phase comparators are included in the CD74HC4046A?

The device includes three different phase comparators: PC1, PC2, and PC3, allowing for various loop filter configurations.

How does the input circuit handle small voltage signals?

It utilizes a self-biasing input circuit that keeps small voltage signals within the linear region of the input amplifier.

Is the CD74HC4046A compatible with the CD4046B?

Yes, the HC4046A and HCT4046A are pin-compatible with the CD4046B series.