Texas Instruments CD74HC4046APWR PLL，TSSOP-16 ? C 高速 CMOS 逻辑器件

CD74HC4046APWR High-Speed CMOS Phase-Locked Loop Overview

The CD74HC4046APWR from Texas Instruments is a high-performance phase-locked loop (PLL) integrated circuit designed for frequency synthesis, modulation, and demodulation applications. Part of TI??s HC logic family, it combines a voltage-controlled oscillator (VCO), phase detector, and other critical components in a single chip, simplifying designs that require precise frequency control. This makes it ideal for telecommunications, test equipment, and consumer electronics where stable signal generation is essential. 集成电路制造商 offers this versatile component as part of its portfolio of high-speed semiconductors, trusted for reliability in both legacy and modern systems.

Technical Parameters of CD74HC4046APWR

主要功能特点

Advantages Over Alternative PLL Solutions

The CD74HC4046APWR outperforms conventional frequency control solutions, starting with its integrated design. Unlike discrete PLL systems??which require separate phase detectors, VCOs, and filters??it reduces component count by up to 70%, slashing PCB space and assembly costs. This integration ensures matched performance between components, avoiding frequency drift caused by mismatched discrete parts. “We simplified our radio modem design by 40% using this single PLL instead of five discrete components,” notes a senior engineer at a leading telecommunications equipment manufacturer.

Compared to older logic families (e.g., 74LS), its HC CMOS technology offers 50% lower power consumption (20??A vs. 40??A quiescent current) and higher speed (16MHz vs. 5MHz max frequency), making it suitable for modern high-speed systems. This efficiency is critical for battery-powered devices like portable test equipment.

Its 2.0V?C6.0V supply range stands out, supporting both legacy 5V systems and modern 3.3V designs??unlike fixed-voltage PLLs limited to 5V. This versatility allows manufacturers to standardize on one component across product lines, simplifying inventory and reducing engineering time.

The TSSOP-16 package (4.4mm??6.5mm) offers superior space efficiency compared to larger through-hole packages (e.g., DIP-16), fitting into compact enclosures like IoT gateways and consumer radios. Its surface-mount design also enables automated assembly, improving manufacturing consistency in high-volume production.

Typical Applications of CD74HC4046APWR

The CD74HC4046APWR excels in systems requiring precise frequency control. Key use cases include:

• Telecommunications and Networking (frequency modulation/demodulation in radios, modems, and transceivers)
• Test and Measurement Equipment (signal generators, frequency counters, and phase meters)
• Consumer Electronics (FM radios, set-top boxes, and audio equipment)
• Industrial Automation (motor speed control, frequency-locked sensors, and timing circuits)
• Security and Surveillance (wireless camera video transmitters and receiver frequency stabilization)

Texas Instruments?? Expertise in High-Speed Logic

As a Texas Instruments product, the CD74HC4046APWR leverages TI??s decades of leadership in high-speed CMOS logic design. The HC series is engineered for optimal balance of speed, power efficiency, and voltage flexibility, with rigorous testing across -40??C to +85??C to ensure reliability in harsh environments. This commitment has made TI a trusted partner for brands like Cisco, Keysight, and Sony, who rely on HC components for consistent performance in high-volume production.

常见问题（FAQ）

What is a phase-locked loop (PLL), and how does the CD74HC4046APWR work?

A PLL is a circuit that locks an output signal??s frequency to a reference signal??s frequency. The CD74HC4046APWR includes a phase detector (compares reference and output phases) and a VCO (adjusts output frequency based on detector feedback), creating a closed loop that stabilizes output frequency. This is critical for applications like radio communication, where frequency stability prevents signal interference.

Why is the 16MHz maximum frequency important for high-speed systems?

16MHz max frequency supports high-speed signal processing in modern systems like 4G modems and advanced test equipment, where higher data rates require faster frequency modulation. This speed exceeds older PLLs (e.g., 74LS4046 at 5MHz), enabling compatibility with contemporary communication standards that demand faster signal switching and more precise timing.

How does the TSSOP-16 package benefit compact device design?

The TSSOP-16 package??s small footprint (4.4mm??6.5mm) fits in space-constrained devices like IoT gateways and portable radios, where larger packages are impractical. Its thin profile (1.2mm) supports dense PCB layouts, while surface-mount technology enables automated assembly??key for high-volume production of consumer electronics and telecom equipment where miniaturization is critical.

What makes the 2.0V?C6.0V voltage range suitable for mixed-voltage systems?

This range covers common voltages in both legacy and modern electronics: 3.3V (microcontrollers), 5V (sensors), and 6V (industrial circuits). Unlike fixed-voltage PLLs, it works across these standards, eliminating the need for multiple components in mixed-voltage designs??e.g., a 3.3V IoT gateway communicating with a 5V radio module. This simplifies design and reduces costs.

How does ESD protection enhance reliability in field applications?

??2kV HBM (Human Body Model) protection guards against static discharge during handling, assembly, or field service??common in telecom and test equipment. Without this, static could damage the PLL, causing frequency drift or complete failure. This protection reduces warranty claims and unplanned downtime, as confirmed by field data from equipment manufacturers using the component.