CD74HC7046AMT

Overview

The CD74HC7046AMT is a high-speed CMOS phase-locked loop (PLL) integrated circuit manufactured by Texas Instruments. It integrates a voltage-controlled oscillator (VCO), an exclusive-OR type phase detector, and a lock detector within a single package. The device operates on a supply voltage ranging from 2 V to 6 V and supports maximum input frequencies up to 38 MHz. It is designed for surface-mount applications in the SOIC-16 package and functions reliably across an extended temperature range of -55°C to +125°C.

Feature Summary

• Integrates a wide-range voltage-controlled oscillator (VCO) capable of covering broad frequency bands without external tuning components.
• Includes an exclusive-OR type phase detector suitable for digital signal processing and frequency multiplication applications.
• Features a dedicated lock detector output that provides a logic signal indicating when the PLL has achieved frequency synchronization.

Applications

• Frequency synthesis and generation circuits
• Clock recovery systems in data communication interfaces
• Motor speed control loops

Procurement Notes

Verify the specific suffix 'AMT' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the ordering information matches the exact SOIC-16 footprint and pinout specifications defined in the official datasheet to ensure compatibility with existing PCB layouts.

Selection Notes

Select this component when a complete PLL solution with integrated VCO and lock detection is required in a compact surface-mount form factor. Ensure the operating voltage range of 2 V to 6 V aligns with the system power rails and that the 38 MHz maximum frequency meets the design requirements.

Part Context

This part belongs to the Texas Instruments 74HC series of high-speed CMOS logic devices. It is a variant of the standard 4046A PLL architecture, optimized for modern surface-mount manufacturing techniques while maintaining compatibility with traditional 74-series logic levels and performance characteristics.

Replacement Considerations

Direct functional equivalents include the CD74HCT7046AMT for 5 V logic interface requirements. Other compatible variants within the same family include the CD74HC7046AM for tube packaging or the CD74HC7046APWR for TSSOP packaging options.