CD74HC4046APWR

Overview

The CD74HC4046APWR is a high-speed CMOS logic phase-locked loop (PLL) integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports a maximum input frequency of 38 MHz. The device features a linear voltage-controlled oscillator (VCO) and three distinct phase comparators, enabling versatile loop configurations. Designed for surface-mount applications, it is housed in a TSSOP-16 package with dimensions of 5 mm length and 1.15 mm height. The component functions reliably across an extended temperature range from -55 °C to +125 °C, utilizing silicon technology to deliver CMOS output levels.

Feature Summary

• Integrates a linear voltage-controlled oscillator (VCO) alongside three selectable phase comparators for flexible loop design.
• Features self-biasing input circuits that maintain small voltage signals within the linear region of the input amplifier.
• Supports direct coupling for large voltage signals or indirect capacitive coupling for small voltage signals.
• Forms a second-order PLL loop when combined with passive low-pass filters.

Applications

• Frequency synthesis systems
• Clock recovery circuits
• Motor speed control loops

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-16 surface-mount package configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the required tape-and-reel packaging format rather than cut-tape or tube variants. Cross-reference the datasheet revision to validate electrical characteristics against current production standards.

Selection Notes

Select this component when a single-channel PLL with multiple phase comparator options is required. The HC series offers higher speed performance compared to standard 4000B series devices while maintaining pin compatibility. Consider the 2 V to 6 V operating range for low-voltage applications. Verify that the TSSOP-16 footprint aligns with the PCB layout constraints and thermal management requirements.

Part Context

This device belongs to the CD74HC4046A family of high-speed CMOS logic ICs. It maintains pin compatibility with the legacy CD4046B series, facilitating migration from older designs. The product falls under the Wireless & RF Integrated Circuits subcategory, specifically within Phase Locked Loops. It is designed to meet JEDEC Standard No. 7 specifications for digital logic components.

Replacement Considerations

The CD74HC4046AM serves as a surface-mount alternative in the SOIC-16 package. For through-hole implementations, the CD74HC4046AE provides a PDIP-16 option. These parts share identical electrical specifications and functional block diagrams, differing only in physical package geometry and mounting style.