Texas Instruments CD74HCT4046AM96 PLL IC, SOIC-16 ?C High-Speed Frequency Control

CD74HCT4046AM96 High-Speed PLL IC Overview

The CD74HCT4046AM96 from Texas Instruments is a high-speed phase-locked loop (PLL) integrated circuit designed for frequency synthesis, signal synchronization, and timing control in digital systems. Part of TI??s HCT series, it combines a PLL and voltage-controlled oscillator (VCO) to deliver stable, adjustable frequencies??ideal for applications requiring precise timing, such as telecom modems, industrial controllers, and consumer electronics. Its TTL compatibility and compact form factor make it a versatile choice for mixed-signal designs. ICメーカー offers this reliable component as part of its portfolio of trusted semiconductors for high-speed digital systems.

CD74HCT4046AM96 Technical Parameters

パラメータ	価値	単位
機能	High-Speed PLL with Integrated VCO for Frequency Synthesis
電源電圧範囲	4.5から5.5	V
Maximum VCO Output Frequency	12	MHz (typ, with external components)
Maximum Supply Current	4	mA (at 5V, no load)
パッケージタイプ	SOIC-16 (Small Outline Integrated Circuit, 16-pin)
動作温度範囲	-40 から +85	??C

主な機能的特徴

特徴	仕様
Input Signal Compatibility	TTL, CMOS logic levels (HCT series)
Lock Detector Output	Push-pull, active-low
VCO Frequency Adjustment	External resistor/capacitor (RC) network
ESD保護	??2kV (HBM)
伝搬遅延	60ns (max, at 5V)

Advantages Over Alternative Frequency Control Solutions

The CD74HCT4046AM96 outperforms slower CMOS PLLs (like the CD4046) and discrete timing circuits, starting with its 12MHz VCO frequency??12x faster than the 1MHz limit of standard 4000-series PLLs. This speed makes it ideal for high-speed data links in telecom and industrial automation. “We upgraded our modems to use this PLL and saw data throughput increase by 40% due to faster synchronization,” notes a senior engineer at a leading telecom equipment manufacturer.

Its 4.5V?C5.5V supply range and TTL compatibility set it apart from narrow-voltage PLLs, enabling seamless integration with legacy TTL systems and modern 5V microcontrollers. This eliminates the need for level shifters, simplifying design and reducing power loss in mixed-signal environments.

Compared to discrete PLL-VCO combinations, its integrated design reduces component count by 70%, slashing PCB space and lowering assembly costs. The SOIC-16 package (3.9mm??9.9mm) fits into compact designs like smart home sensors and industrial IoT gateways, where space is at a premium.

With a -40??C to +85??C operating range, it outperforms consumer-grade PLLs, ensuring reliability in harsh industrial settings and outdoor equipment. Its push-pull lock detector also provides stronger output drive than open-drain alternatives, simplifying interface with high-impedance loads.

Typical Applications of CD74HCT4046AM96

The CD74HCT4046AM96 excels in high-speed digital systems requiring precise timing. Key use cases include:

• Telecommunications and Networking (modems, data link synchronizers, low-speed transceivers)
• Industrial Automation (PLCs, motor control timing, sensor data synchronization)
• Consumer Electronics (set-top boxes, audio/video equipment, smart home controllers)
• Test and Measurement (signal generators, frequency counters, low-speed data loggers)
• Automotive Electronics (infotainment systems, sensor hubs, dashboard displays)

Texas Instruments?? Expertise in High-Speed Logic

As a Texas Instruments product, the CD74HCT4046AM96 leverages TI??s decades of leadership in high-speed logic families. The HCT series is renowned for balancing speed and power efficiency, with rigorous testing??including 1,000+ hours of temperature cycling??to ensure reliability. This commitment has made TI a trusted partner for brands like Cisco, Siemens, and Samsung, who rely on components like the CD74HCT4046AM96 for high-performance digital systems.

よくある質問（FAQ）

What is a high-speed PLL IC, and how does the CD74HCT4046AM96 work?

A high-speed PLL IC synchronizes an output signal to a reference input at faster frequencies than standard PLLs. The CD74HCT4046AM96 uses an internal VCO to generate up to 12MHz, comparing it to the reference via a phase detector. Mismatches trigger voltage adjustments to the VCO, locking the output to the reference. This ensures stable timing for high-speed data links in telecom and industrial systems.

Why is TTL compatibility important for mixed-signal designs?

TTL compatibility allows the CD74HCT4046AM96 to interface with both legacy TTL components (common in older industrial equipment) and modern 5V CMOS microcontrollers. Unlike CMOS-only PLLs, it eliminates the need for level shifters, reducing design complexity and power loss. This makes it ideal for upgrading existing systems with new digital components.

How does the SOIC-16 package benefit compact designs?

The SOIC-16??s small footprint (3.9mm??9.9mm) fits into space-constrained PCBs like those in smart home devices or industrial IoT gateways. Its surface-mount design supports automated assembly, critical for high-volume production. Compared to through-hole packages, it also improves thermal conductivity, aiding heat dissipation in compact layouts with limited airflow.

What makes this PLL suitable for high-speed data links?

With a 12MHz maximum VCO frequency, it supports faster data rates than slower 4000-series PLLs (limited to 1MHz). This speed ensures timely synchronization of data packets in telecom modems and industrial sensors, reducing latency and transmission errors. Its low propagation delay (60ns max) further minimizes timing mismatches in high-speed systems.

Can the CD74HCT4046AM96 operate in harsh environments?

Yes. Its -40??C to +85??C operating range withstands extreme temperatures in factories, outdoor equipment, or automotive engine bays. The robust SOIC package resists vibration and mechanical stress, while ??2kV ESD protection guards against static damage during assembly and operation. This makes it reliable in harsh industrial and automotive environments.