100 MHz HighStability LowPhaseNoise VCTCXO – How to Select the "Frequency Heart" for Communication Systems

Stable Frequency · Low Phase Noise · Precision Electronic Tuning
— Providing a Reliable Clock Reference for 5G Base Stations, Microwave Communications, and Test Instruments

In modern communication systems, the reference clock plays a role comparable to the human heart. It directly determines frequency accuracy, carrier stability, signal purity, and system synchronization performance. Especially in scenarios such as 5G/wireless communications, microwave backhaul, and highspeed data transmission, higher frequency stability and lower phase noise are the keys to reducing system clock jitter, lowering bit error rates, and improving RF link performance.

Today, we introduce a 100 MHz VCTCXO specifically designed for highperformance communication equipment – the US14S6100.0002250NQDT0Q, from HCI. Combining high stability, ultralow phase noise, and a wide tuning range, it is an optimal choice for communication frequency references.

01｜Why Are HighPerformance VCTCXOs Indispensable in Communication Systems?

Frequency accuracy affects carrier synchronization and demodulation quality.

Phase noise degrades spectral purity and increases adjacentchannel interference.

Temperature stability determines device reliability in harsh outdoor environments.

Electronic tuning capability facilitates PLL locking and automatic frequency control (AFC).

A good VCTCXO provides a clean, stable, and controllable frequency source for the RF frontend, PLL, local oscillator circuits, and highspeed data clocks.

02｜Five Core Performance Highlights – A Look at the Hardware Strength

① ±0.5 ppm High Stability

Operating temperature: -40 ℃ to +85 ℃

Frequency stability over full temperature range: ±0.5 ppm

Easily handles widetemperature scenarios such as base stations and outdoor equipment.

② UltraLow Phase Noise (100 MHz Typical)

Low phase noise = cleaner spectrum + lower clock jitter, directly improving communication link quality.

③ ±6 ppm Electronic Tuning Range

Control voltage: 0 to 5 V (center voltage 2.5 V)

Suitable for PLL frequency locking, AFC, frequency calibration, and system frequency offset compensation.

④ +7 dBm SineWave Output

Output power: +7 dBm into 50 Ω load

Standard sinewave waveform, perfectly compatible with RF and highperformance clock chains.

⑤ 14×9 mm Compact Package

6pad SMD metal package, offering both shielding performance and PCB space efficiency.

Ideal for highdensity boardlevel designs in communication equipment.

03｜Typical Application Scenarios

04｜Typical Application Architecture

100 MHz VCTCXO

      ↓

PLL / Frequency Synthesizer

      ↓

Clock / LO Generation

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RF Transceiver

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Baseband / Data Processing

A highperformance VCTCXO provides stable, clean frequency support for the entire communication link from top to bottom.

05｜Key Specifications at a Glance

06｜Summary

The HCI 100 MHz VCTCXO, with ±0.5 ppm high stability, -165 dBc/Hz ultralow phase noise, ±6 ppm electronic tuning range, and +7 dBm sinewave output, delivers a stable, clean, and controllable frequency reference for nextgeneration communication equipment, RF systems, and precision test instruments.

Whether in base stations, microwave links, satellite communications, highspeed networks, or test and measurement, it is fully capable of serving as the "frequency heart."

HCI VCTCXO – Providing a more stable and purer frequency reference for communication systems.