CD74HC4046ANSR

Overview

The CD74HC4046ANSR is a high-speed CMOS 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 maximum input frequencies up to 38 MHz. The device integrates a linear voltage-controlled oscillator (VCO) and three distinct phase comparators, enabling flexible loop configurations via passive low-pass filters. Designed for surface-mount applications, it utilizes a 16-pin SOIC package. The component functions as a single-circuit PLL with CMOS output levels, suitable for frequency synthesis and clock recovery tasks in wireless and RF systems.

Feature Summary

• Integrates a linear voltage-controlled oscillator (VCO) alongside three selectable phase comparators for versatile 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.

Applications

• Frequency synthesizers for wireless communication equipment
• Clock recovery circuits in data transmission systems
• FM demodulation applications

Procurement Notes

Verify the specific suffix 'SR' indicates tape-and-reel packaging when sourcing from distributors. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the ordering quantity aligns with the standard reel pack size defined by the supplier. Cross-reference the datasheet revision date to guarantee compatibility with current design specifications.

Selection Notes

Select this component when a wide supply voltage range between 2 V and 6 V is required for CMOS logic compatibility. Choose the SOIC-16 package for surface-mount assembly constraints. Consider the CD74HCT4046 variant if strict 5 V TTL input thresholds are necessary instead of standard CMOS levels. Verify that the 38 MHz maximum frequency meets the system's signal processing requirements.

Part Context

This part belongs to the SN74HC4046A and SN74HCT4046A families of high-speed silicon-gate CMOS logic devices. These components offer pin-out compatibility with the legacy CD4046B series while providing significantly faster switching speeds. The family is designed to meet JEDEC standards for CMOS operation, ensuring interoperability with other high-speed logic components in mixed-voltage digital systems.

Replacement Considerations

CD74HC4046APWR: Same functional device in TSSOP-16 packaging. CD74HC4046AE: Equivalent function in PDIP-16 through-hole package. CD74HCT4046AM: HCT logic version requiring 4.5 V to 5.5 V supply voltage.