Sumtan Quartz Crystal and Crystal Oscillator

September 8, 2020 Views
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Suntan Technology Company Limited

--All kinds of Capacitors

Dear Friends,

Suntan provides wide ranges and high quality of capacitors. This series includes crystal oscillators and quartz crystal, which separate a different package type. Low cost and wide frequency range but also good aging and a stable temperature. It was also metal models for these series.

Quartz Crystal:
TSQ-HC49S
TSQ-HC49U
TSQ-HC49SMD
TSQ-1612SMD
TSQ-2016SMD
TSQ-2520SMD
TSQ-3225SMD
TSQ-5032SMD
 
TSQ-OSC2520
TSQ-OSC3225
TSQ-OSC5032
TSQ-OSC7050
 
TSQ-2060DIP
TSQ-3050DIP

Sumtan Quartz Crystal and Crystal Oscillator

Suntan’s New Product: TSQ-1612SMD (SMD Quartz Crystal)

April 21, 2020 Views
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Suntan Technology Company Limited
--All kinds of Capacitors

Suntan has launched a new SMD quartz crystal- TSQ-1612SMD.

Holder type is 1.6x1.2mm ceramic surface mount.

Features:
1.The entire package can be grounded via the top metal lid and the two bottom pads.
2.Small footprint. Ideal for space constrained applications.
3.Exhibits extremely low aging with a high shock & vibration resistance.

More detailed info, please click on the following link: http://www.suntan.com.hk/pdf/Quartz-Crystal/TSQ-1612SMD.pdf

For price or any questions, please feel free to contact our sales: sales@suntan.com.hk
Thank you!

Suntan’s New Product: TSQ-1612SMD (SMD Quartz Crystal)

Su Suntan Updated ISO Certificate

April 30, 2019 Views
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 Suntan Technology Company Limited
---All kinds of Capacitors

Suntan has updated the ISO certificate for our film capacitors and motor capacitors.
We’ll keep trying our best to offer our customers high quality products.

Su Suntan Lunches TSQ-5032SMD Metal Seam Seal Package Quartz Crystal

April 10, 2019 Views
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Suntan Technology Company Limited
---All kinds of Capacitors

Suntan's TSQ-5032SMD quartz crystal come in an industry standard, 5.0 mm x 3.2 mm x 0.8 mm ceramic package that uses rugged AT-cut crystal construction for reliable operation, including startup at low temperatures, and it features low power consumption. The TSQ-5032SMD operates from a 1.6 V up to 5.5 V power supply and offers a temperature range of -40°C to +125°C.

Features:
Low cost, Good aging
Wide frequency range
Tight Tolerance and Stability
Designed for automatic mounting and reflow soldering
Tape and Reel (1,000 pcs STD)
Pb-free & RoHS Compliance
Applications:
It ideally suited for disc drives, HDD, PCMCIA cards, notebook PC, GPS, Bluetooth, wireless LAN, USB dongle, pen driver and hand held electronic products.
If you have special requirements, we also have 5032SMD quartz crystal in glass seal package and many sizes for your choice.

Common Frequency XTAL Quartz Crystal 5032SMD:

8MHz

20MHz

10MHz

22.1184MHz

11.0592MHz

24MHz

12MHz

24.576MHz

12.288MHz

25MHz

12.8MHz

26MHz

13.56MHz

27MHz

14.31818MHz

27.12MHz

14.7456MHz

28.63636MHz

16MHz

30MHz

18.432MHz

32MHz

Su Suntan Miniature Quartz Crystal Ceramic TSQ-3225SMD

April 9, 2019 Views
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Suntan Technology Company Limited
---All kinds of Capacitors

Are you waiting for suntan new products? Suntan launches the Quartz Crystal TSQ-3225SMD in spring, 2019. 3225SMD size miniature and lightweight SMD crystal units with low profile of 3.2*2.5*0.7 mm, which is metal seam seal package. These compact crystals are ideal for surface mounting in densely populated or small form-factor PCB applications.

Features:
Rugged AT-cut crystal construction
Frequency Range: 12.000MHz-54.000MHz.
Low cost, Good aging
Tight Tolerance and Stability
Designed for automatic mounting and reflow soldering
Tape and Reel (3,000 pcs STD)
Support high temperature up to 125℃
Pb-free and RoHS/Green compliant

Applications:
TSQ-3225SMD for electronics applications like Bluetooth wireless communication sets, HDD, DSN, PDA, GPS, digital tune, wireless LAN , mobile phone, LAN ISM band radio and clock for MPU.
If you have special requirements, we also have 3225SMD quartz crystal in glass seal package and many sizes for your choice.

Common Frequency XTAL Quartz Crystal 3225SMD:

12.288MHz

12.8MHz

13.56MHz

14.31818MHz

14.7456MHz

16MHz

18.432MHz

19.2MHz

20MHz

22.1184MHz

24MHz

24.576MHz

25MHz

26MHz

27MHz

27.12MHz

28.63636MHz

30MHz

32MHz

40MHz

48MHz

Suntan Share Equivalent Circuit of a Quartz Crystal Resonator

September 9, 2015 Views
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Suntan Technology Company Limited
---All Kinds of Capacitors
 
To analyse the electrical response of a quartz crystal resonator, it is very often useful to depict it as the equivalent electrical components that would be needed to replace it. 
This equivalent circuit is can then be used to analyse its response and predict its performance as in the diagram below:
 
The equivalent circuit given below is often called the 4-parameter crystal model and it is sufficient for many calculations and to illustrate the operation of the crystal.
The 4 parameter theoretical equivalent circuit of a quartz crystal showing the series resistance, capacitance and inductance together with a parallel capacitance.
 
 
Quartz crystal theoretical equivalent circuit
 
It is possible to equate these theoretical constituent components to real physical attributes of the crystal:
 
L: The inductance arises from the mass of the material.
C1: This capacitance arises from the compliance of the crystal.
R: This element arises from the losses in the system. The largest of these arises from the frictional losses of the mechanical vibration of the crystal.
Co: This capacitance in the theoretical quartz crystal equivalent circuit arises from the capacitance between the electrodes of the crystal element. This is often refered to as the shunt capacitance.
 
Apart from their use in oscillators, quartz crystals find uses in filters. Here they offer levels of performance that cannot be achieved by other forms of filter. 
Often several crystals may be used in one filter to provide the correct shape.

For more details please check : http://www.suntan.com.hk/Quartz-Crystal/

Su Suntan What is a Varistor?

January 30, 2009 Views
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Suntan Technology Company Limited
---All kinds of Capacitors

A varistor is a type of resistor with a significantly non-ohmic current-voltage characteristic. The name is a portmanteau of variable resistor*, which is misleading since it is not continuously user-variable like a potentiometer or rheostat, and is not a resistor but in fact a capacitor. Varistors are often used to protect circuits against excessive voltage by acting as a spark gap.

The most common type of varistor is the metal oxide varistor, or MOV. This contains a mass of zinc oxide grains, in a matrix of other metal oxides, sandwiched between two metal plates (the electrodes). The boundary between each grain and its neighbour forms a diode junction, which allows current to flow in only one direction. The mass of randomly oriented grains is electrically equivalent to a network of back-to-back diode pairs, each pair in parallel with many other pairs. When a small or moderate voltage is applied across the electrodes, only a tiny current flows, causes by reverse leakage through the diode junctions. When a large voltage is applied, the diode junctions break down because of the avalanche effect, and a large current flows. The result of this behaviour is a highly nonlinear current-voltage characteristic, in which the MOV has a high resistance at low voltages and a low resistance at high voltages.

If the size of the transient pulse (often measured in joules) is too high, the device may melt, or otherwise be damaged. For example, a nearby lightning strike may permanently damage a varistor.

Important parameters for varistors are response time (how long it takes the varistor to break down), maximum current and a well-defined breakdown voltage. When used in communications lines (such as phone lines used for modems), high capacitance is undesirable since it absorbs high frequency signals, thereby reducing the available bandwidth of the line being protected.

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