CD74HC7046AMR2544

Overview

The CD74HC7046AMR2544 is a high-speed CMOS phase-locked loop (PLL) integrated circuit manufactured by Harris Corporation. It integrates a voltage-controlled oscillator (VCO), a lock detector, and an exclusive-OR phase comparator within a single package. The device operates on a supply voltage ranging from 2 V to 6 V and supports input frequencies up to 38 MHz. Designed for robust performance in demanding environments, it functions reliably across an extended temperature range of -55 °C to +125 °C. The component utilizes surface-mount technology, specifically packaged in the SOIC-16 format, ensuring compatibility with automated assembly processes while maintaining signal integrity for frequency synthesis applications.

Feature Summary

• Integrates a wide-range voltage-controlled oscillator capable of supporting high-frequency operations up to 38 MHz.
• Includes a dedicated lock detector circuit to provide immediate status indication regarding phase-lock acquisition.
• Features an exclusive-OR phase comparator designed to offer high sensitivity and effective noise rejection capabilities.

Applications

• High-frequency sensor heating power circuits requiring automatic frequency tracking to maintain efficiency.
• Frequency synthesis systems utilizing CMOS logic families for stable clock generation.
• Phase-locked loop implementations in wireless and RF integrated circuit designs.

Procurement Notes

Verify the manufacturer origin carefully, as Texas Instruments acquired Harris Semiconductor's logic product lines. Confirm that the suffix R2544 corresponds to the specific reel quantity and tape-and-reel packaging configuration intended for your production line. Ensure the part number matches the exact logic family specifications required for your design.

Selection Notes

Select this component when a complete PLL solution including VCO and lock detection is needed within a standard 16-pin footprint. Consider the HC logic family for its balanced speed and power consumption profile compared to HCT variants. Verify that the operating voltage range of 2 V to 6 V aligns with your system's power rails and that the industrial temperature rating meets environmental requirements.

Part Context

This component belongs to the 74HC7046A series of phase-locked loops, originally developed by Harris Corporation before being absorbed into Texas Instruments' portfolio. The series is characterized by its integration of essential PLL blocks into a single CMOS chip, facilitating simplified circuit design for frequency modulation and demodulation tasks without requiring external discrete components for basic operation.

Replacement Considerations

Direct replacements include the CD74HC7046AM or CD74HC7046AM96 from Texas Instruments, which share identical functional pinouts and electrical characteristics. Cross-reference with NXP's 74HC7046AN for through-hole compatible alternatives if layout changes are permissible. Verify that any substitute maintains the same 38 MHz maximum input frequency specification.