HOSONIC's wideband voltage-controlled crystal oscillator (VCXO) is ideally suited for multi-mode base station RTC applications.

Within the operational architecture of a telecom base station, the real-time clock (RTC) serves as the critical time reference. Whether for synchronizing device scheduling, controlling data-transmission timing, or generating precise timestamps during fault analysis, all functions depend on the RTC to deliver an accurate and stable time signal. The mainstream RTC solution for today’s base stations is built around a timing IC, a crystal oscillator, a power-management module, and peripheral circuitry. Among these, the crystal oscillator—acting as the core frequency source—directly determines the RTC’s timing accuracy. Compared with ordinary quartz crystals, the voltage-controlled crystal oscillator (VCXO) offers distinct advantages: an external tuning voltage enables fine adjustment of the output frequency, effectively compensating for drift caused by temperature variation, supply ripple, and long-term aging. This keeps the RTC’s timing error within strict limits, even in harsh outdoor environments characterized by wide temperature swings and humidity changes, thereby safeguarding overall communication quality.

For the specific requirements of base-station RTCs, VCXOs in the 1.75–54 MHz band have emerged as the preferred choice. This range covers the frequency demands of most RTC ICs, accommodates the design specifications of diverse base-station equipment, and achieves an optimal balance between stability and power consumption. In practice, these VCXOs respond in real time to frequency-calibration commands from the base-station system, rapidly correcting any deviations induced by environmental disturbances and keeping RTC error within the millisecond range—preventing communication dropouts or data-transmission faults caused by time-sync inaccuracies. The wideband characteristic also enables multi-module compatibility, reducing the variety of crystal part numbers across different functional blocks and lowering both design complexity and maintenance cost.

HOSONIC, a specialist crystal manufacturer, has tailored its 1.75–54 MHz D7SV-series VCXOs expressly for base-station RTC applications. Housed in a compact SMD package, the devices feature high resistance to vibration and mechanical shock, meeting the stringent demands of outdoor installations. Electrically, the D7SV series delivers a frequency stability of ±5 ppm over –40 °C to +85 °C—well above industry norms—and phase noise as low as –120 dBc/Hz at 1 kHz offset, minimizing spurious signals and preserving the purity of the RTC clock. Benchmarked against competing products, the D7SV line excels in key metrics: pull range (±10 ppm to ±100 ppm selectable), supply-voltage tolerance (2.5 V–5.0 V), and aging (≤ ±1 ppm/year).

MANDU, the official distributor for HOSONIC VCXOs, provides end-to-end support: expert part selection to match each RTC requirement, technical assistance during installation and debug, and free sample devices to accelerate performance validation.

As base-station deployments impose ever-tighter timing requirements, selecting a dependable, highly compatible VCXO is essential to RTC reliability. HOSONIC’s 1.75–54 MHz D7SV-series VCXOs combine exceptional frequency stability, broad environmental tolerance, and flexible parameter options to meet the core demands of telecom base-station RTCs, establishing a rock-solid time reference for long-term operation. Backed by MANDU’s full-service support—covering part selection, debug assistance, and sample testing—these devices eliminate downstream concerns. Whether for new installations or legacy upgrades, HOSONIC VCXOs represent the optimal RTC solution for base-station applications. They are poised to help communication providers enhance operational efficiency and reduce maintenance costs, driving continuous optimization of network quality.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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