Quartz Crystal Manufacturer · Shenzhen, China · ISO 9001:2015

Crystal Resonators & Crystal Oscillators Manufacturer — Quartz Crystals, SMD/DIP Oscillators, Precision Frequency Control

Vistar Electronics manufactures a complete range of crystal resonators and crystal oscillators for precise frequency control in digital systems. Our portfolio includes quartz crystal resonators (HC-49S, HC-49SMD, 32.768kHz tuning fork, SMD 1612/2016/2520/3225/5032/7050 packages), crystal oscillators (SPXO), VCXO, TCXO, and OCXO options. Frequencies from 32.768kHz to 200MHz+, with frequency tolerance from ±10ppm to ±100ppm and operating temperature range -40°C to +125°C. All products RoHS 3 & REACH compliant, ISO 9001:2015 certified. OEM/ODM customization — from custom frequencies and load capacitance to tape-and-reel packaging — is fully supported. Free samples available for qualified engineering projects.
HC-49S / HC-49SMD / HC-49U SMD 1612 / 2016 / 2520 / 3225 / 5032 / 7050 32.768kHz – 200MHz+ Frequency ±10ppm – ±100ppm Tolerance -40°C to +125°C Operation RoHS 3 & REACH
Frequency Control

Crystal Units, Oscillators & More

High‑precision timing solutions for industrial, automotive, and communications applications.

Crystal Units
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Crystal Units

SMD & Through‑Hole

 Crystal Oscillators
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Crystal Oscillators (XO)

CMOS, LVDS, PECL

 VCTCXO
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VCTCXO

Temperature Compensated

 VCXO
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VCXO

Voltage Controlled

 OCXO
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OCXO

LVDS, LVPECL, HCSL

Technical Reference
Crystal Resonators & Oscillators — Type & Parameter Comparison

Quartz Crystal Resonators

PackagesHC-49S, HC-49SMD, HC-49U
Frequency32.768kHz – 100MHz
Load Capacitance6pF – 20pF
Tolerance±10ppm – ±50ppm
Temp Range-40°C to +85°C / +125°C
Ext. RefJauch Crystals

SMD Crystal Oscillators (SPXO)

Packages2016, 2520, 3225, 5032, 7050
Frequency1MHz – 200MHz
Supply Voltage1.8V – 3.3V
OutputCMOS, LVDS, HCSL, LVPECL
Stability±25ppm – ±100ppm
Ext. RefSiTime Oscillators

TCXO / VCXO / OCXO

PackagesSMD 2520, 3225, 5032, DIP
Stability±0.5ppm – ±5ppm
TCXO Range-40°C to +105°C
VCXO Pull Range±50ppm – ±200ppm
Ext. RefNDK Precision Oscillators

32.768kHz Tuning Fork

PackagesCylinder 2×6, SMD 3215, 7015
Load Capacitance6pF, 7pF, 12.5pF
Tolerance±20ppm – ±50ppm
ESR (max)50kΩ (typical)
Ext. RefMicro Crystal 32kHz
Why Choose Vistar Crystals & Oscillators
Key Features
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Full Frequency Range — 32.768kHz to 200MHz+

Low-frequency tuning fork (32.768kHz) for RTC and power-sensitive timing, fundamental-mode crystals for MCU clocks, and overtone-mode up to 200MHz+ for high-performance processors and wireless chips.

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High Precision — ±10ppm to ±100ppm

Frequency tolerance options from ±10ppm for precision applications (GPS, base stations) to ±100ppm for general-purpose timing. Custom tolerances and temperature compensation available.

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Extended Temperature — -40°C to +125°C

Industrial and automotive-grade temperature ranges. TCXO options maintain tight stability across extreme temperature variations, suitable for outdoor and under-hood applications.

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Multiple Packages — HC‑49S, SMD 2016/2520/3225/5032/7050

From legacy through-hole HC-49S to ultra-compact SMD 2016 (2.0×1.6mm) for space‑constrained designs. All packages available in tape‑and‑reel for automated assembly.

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RoHS 3, REACH & ISO 9001 Certified

All crystal products manufactured under ISO 9001:2015. Fully compliant with RoHS 3 (EU 2015/863) and REACH SVHC. Certificates available for CE and automotive (AEC‑Q200) qualification upon request.

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Full OEM/ODM Customization

Custom frequencies, load capacitance (6pF–20pF), tolerance, temperature range, and packaging. Free engineering samples for qualified projects. Contact sales@vistarelectronics.com with your specifications.

Industries & Use Cases
Crystal Resonator & Oscillator Applications
Consumer ElectronicsSmartphones, tablets, laptops, wearables, TWS earbuds, gaming consoles
Automotive ElectronicsECU, ADAS, infotainment, body control, telematics, EV charging
Industrial ControlPLCs, HMIs, motor drives, factory automation, robotics, CNC
TelecommunicationsBase stations, routers, switches, optical modules, 5G infrastructure, GPS
Medical DevicesPatient monitors, diagnostic equipment, implantables, wearable health trackers
IoT & Smart HomeSensors, gateways, smart meters, home automation hubs, LoRa/Wi-Fi modules
Test & MeasurementOscilloscopes, signal generators, spectrum analyzers, data acquisition
Aerospace & DefenseAvionics, navigation, communication systems, radar, military electronics
Common Questions
Frequently Asked Questions — Crystal Resonators & Crystal Oscillators
What is the difference between a crystal resonator and a crystal oscillator?
A crystal resonator (passive crystal) is just the quartz element and requires an external oscillator circuit (usually a Pierce oscillator with two load capacitors and an inverter) to generate a clock signal. A crystal oscillator (active crystal) integrates the quartz crystal with an oscillation circuit and buffer inside the package, providing a complete clock output on power‑up. Crystal oscillators are easier to use (no external components needed) but have higher power consumption and cost than resonators. For detailed design guidance, see Pierce crystal oscillator design guide and crystal resonator electrical performance guide.
What load capacitance should I choose for my crystal resonator?
Load capacitance (CL) is a critical parameter that affects oscillation frequency and stability. The effective load capacitance seen by the crystal is CL = (C1 × C2) / (C1 + C2) + Cstray, where C1 and C2 are the external capacitors and Cstray is the parasitic capacitance (typically 1–3pF per terminal). Most MCUs and wireless ICs specify the required CL in their datasheets. Common CL values are 6pF, 8pF, 10pF, 12.5pF, 16pF, and 20pF. When C1 ≈ C2, the relationship simplifies to C1 ≈ 2 × (CL − Cstray). For example, with CL = 8pF and Cstray ≈ 2pF, use C1 = C2 = 12pF. Using the wrong load capacitance can cause frequency deviation beyond the specified tolerance.
What frequency tolerance and temperature range options do you offer?
We offer frequency tolerance options from ±10ppm to ±100ppm depending on your application. Operating temperature ranges include: -20°C to +70°C (commercial grade), -40°C to +85°C (industrial grade), and -40°C to +125°C (automotive/high‑temperature grade). For demanding applications requiring tight stability across temperature, TCXO options achieve ±0.5ppm to ±5ppm over temperature. For absolute precision, OCXO provides ±0.1ppb to ±50ppb stability.
What is the difference between HC‑49S, HC‑49SMD, and SMD packages?
HC‑49S is a through‑hole cylindrical crystal with 11.0×4.65mm footprint, commonly used in legacy designs and prototyping. HC‑49SMD is the SMD equivalent of HC‑49S (13.0×4.85mm), offering surface‑mount assembly with similar electrical characteristics. Standard SMD packages (2016, 2520, 3225, 5032, 7050) are smaller and better suited for high‑density PCB layouts. For example, 2016 (2.0×1.6mm) is only 1/20th the footprint of HC‑49S. Choose based on your available board space and assembly process — SMD packages support automated pick‑and‑place, while through‑hole HC‑49S is suitable for manual assembly and wave soldering.
Are Vistar crystal products RoHS and REACH compliant?
Yes, 100% of our crystal resonators and crystal oscillators comply with RoHS 3 (EU Directive 2015/863) and REACH SVHC regulations. For more on RoHS compliance, see the official RoHS Guide. Certificates and full test reports are available upon request. AEC‑Q200 qualified options are also available for automotive applications.
What is the typical lead time and MOQ for crystals and oscillators?
Standard MOQ for crystal resonators is 1,000 pieces per model. Standard MOQ for crystal oscillators is 1,000 pieces per model (500 pieces for SMD packages). Free samples are available for qualified engineering projects. Lead time for standard products is 2–4 weeks; custom frequencies and OEM orders typically require 4–6 weeks.

Crystal Resonators & Crystal Oscillators Manufacturer — Shenzhen Vistar Electronics

Shenzhen Vistar Electronics Co., Ltd. is a professional crystal resonators and crystal oscillators manufacturer based in Pingshan District, Shenzhen, China — the global electronics hub. Since 2009, we have specialized in the design and production of precision frequency control components. Our portfolio covers HC-49S, HC-49SMD, HC-49U through-hole packages, SMD 1612, 2016, 2520, 3225, 5032, 7050 packages, 32.768kHz tuning fork crystals, SPXO (standard crystal oscillators), VCXO (voltage‑controlled crystal oscillators), TCXO (temperature‑compensated crystal oscillators), and OCXO (oven‑controlled crystal oscillators) — with frequencies from 32.768kHz to 200MHz+.

All Vistar crystal products are manufactured under an ISO 9001:2015 certified quality management system with advanced quartz blank processing (lapping, polishing, and photolithography). Frequency tolerance options from ±10ppm to ±100ppm, load capacitance 6pF–20pF, equivalent series resistance (ESR) optimized per package size, and operating temperature range -40°C to +125°C. All models are fully RoHS 3 and REACH compliant, suitable for export to the EU, North America, and all regulated markets.

For authoritative technical background, we recommend referring to global resources: Pierce crystal oscillator design guide, crystal resonator electrical performance guide, and Jauch quartz crystal technical guide. These resources validate Vistar's alignment with internationally recognized crystal specifications and design practices.

Explore related product lines: SMD Crystal Resonators, 32.768kHz Crystals, Board‑to‑Board Connectors, and USB‑C Connectors. Contact our sales team for free samples, technical data sheets, or a custom OEM quotation — we respond within 24 hours. ✉️ sales@vistarelectronics.com | 📞 +86 150 1925 5609

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