Kingtronics Blog

Quartz crystal oscillator is a quartz crystal resonator made of quartz material, commonly known as crystal oscillator. 
It plays the role of generating frequency, has stability and good anti-interference performance, and is widely used in various electronic products.

The structure of the quartz crystal oscillator (crystal oscillator for short) is a resonant device made of the piezoelectric effect of a quartz crystal (structured body of silicon dioxide). 
Its basic structure is roughly as follows: Cut a thin slice at a certain azimuth angle (referred to as a wafer, it can be square, rectangular, or circular, etc.), coat silver layers on its two corresponding surfaces as electrodes, and solder a lead wire on each on the pins, coupled with the package shell constitutes a quartz crystal resonator, referred to as quartz crystal or crystal, crystal oscillator. 
Its products are generally packaged in metal shells, but also in glass, ceramic or plastic packages.

Due to AKM fire in October, 2020, many suppliers are not accepting new order for Quartz crystal oscillator.
But Kingtronics team can help you, please feel free to share us your request.
https://www.kingtronics.com/quartz-crystals/index.html

Japan's Asahi Kasei (AKM) semiconductor factory broke out fire on 21st October and ceased production. 

The impact of the fire on the supply and performance is still unclear. Many customers are worried about the TCXO L/T and production status . 

Kingtronics can support you steady L/T around 3~5 weeks with RoHS certified.. welcome your inquiry! 

The whole Kingtronics members feel much grateful for all customers' long-term support. Wish lasting prosperity and success.

Let's expect more communication on cooperation, never hesitate to seek timely support from us.

Quartz Crystal Advantages:
1, Good stability, small changes;
2, Good accuracy, high precision;
3, Low power consumption, small excitation power;
4, Fixed (non-adjustable).

Quartz Crystal Structure:

When you order Quartz Crystal Resonator, you have to at least keep 5 essential aspects.
Package Type,  Frequency, Load Capacitance, Frequency Tolerance,Operating Temperature

Examples : 
QKT-HC49U, 16.000MHz,  20pF, +/-30ppm, -20℃~+70℃
QKT-HC49S, 12.000MHz,  20pF, +/-20ppm, -10℃~+60℃
QKT-HC49SMD, 10.000MHz, 20pF, +/-30ppm, -20℃~+70℃
QKT-3225SMD, 26.000MHz, 20pF, +/-10ppm, -20℃~+70℃

Free samples are available and welcome your enquiry and test our samples.

If you need more products information, please check : 
www.kingtronics.com/quartz-crystals/QKT-HC49S.html

Kingtronics offers passive leaded quartz crystal HC49U, HC49S, SMD quartz crystal HC49SMD and 3225 SMD Crystals.
We also produce active 3225, 5032, 5070 SMD Oscillators.

The passive quartz crystal are ideally suited designed for Bluetooth wireless communication sets, HDD, DSN, PDA,GPS,Digital Tuner, Wireless LAN and mobile phones. 
The Active SMD Oscillators are ideally suited for disc-drives, NB, Networking, GPS/Navigation, BlusTooth, Ethernet, ADSL, VDSL, Fiber chaneel hand-held electronics products. 
Kingtronics rapid response and in depth technical support is exceptional. You will find our highly skilled, experienced sales representatives satisfactory.

If you need more products information, please check : 
www.kingtronics.com/quartz-crystals/QKT-HC49U.html

Kingtronics offers leaded quartz crystal HC49U, HC49S and SMD quartz crystal HC49SMD. The quartz crystal market, in general, requires hands on customer service.

Kingtronics rapid response and in depth technical support is exceptional. You will find our highly skilled, experienced sales representatives satisfactory.

More information please visit: http://www.kingtronics.com/quartz-crystals/

Quartz Crystals General Information

Kt Kingtronics offers leaded quartz crystal HC49U, HC49S and SMD quartz crystal HC49SMD. The quartz crystal market, in general, requires hands on customer service. Quartz crystals are manufactured for frequencies from a few tens of kilohertz to tens of megahertz. More than two billion (2×109) crystals are manufactured annually. We also stock crystals in most popular package styles, frequencies and specifications for quick delivery.

49USMD crystals are low profile surface mount crystals with the same footprint as standard HC49 and HC49-4H crystals. 49USMD crystals are ideal for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. With a broad frequency range from 3.200MHz to 90.000 MHz, the HC49SMD can serve as a low cost solution in virtually any application or market. The HC49SD is available in surface mount (SMD) packaging only.

A quartz crystal resonator depends on the piezo-electric effect to work. This effect converts a mechanical stress in a crystal to a voltage and vice versa. In this way the piezo-electric effect converts the electrical impulses to mechanical stress which is subject to the very high Q mechanical resonances of the crystal, and this is in turn linked back into the electrical circuit.

The quartz crystal can vibrate in several different ways, and this means that it has several resonances, all on different frequencies. Fortunately the way in which the quartz crystal blank is cut from the original crystal itself can very significantly reduce this. In fact the angle of the faces relative to the original crystal axes determines many of its properties from the way it vibrates to its activity, Q, and its temperature co-efficient. There are three main ways in which a crystal can vibrate: longitudinal mode, low frequency face shear mode, and high frequency shear. A cut known as the AT cut used for most crystals used in traditional radio and electronics circuits uses the high frequency shear mode.

Vibrational modes of a quartz crystal resonator
(For the sake of clarity, the movements have been greatly exaggerated)

Quartz is used in the making of sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement, mortar, and jewelry. Quartz crystals are also piezoelectric meaning when an electrical current passes through them they vibrate a small amount. Time can be measured from the vibrations of the quartz crystals so quartz crystals are often used in clocks.

Quartz crystals may either operate in a fundamental mode or in an overtone mode. Below frequencies of around 25 MHz crystals are normally designed to operate in their fundamental mode, whereas above this they will normally be designed for overtone operation, although with manufacturing techniques improving higher frequency crystals are becoming available. The mode is therefore an important element of the crystal specification.