A crystal oscillator datasheet is a technical specification related information from a crystal oscillator product. Things that are usually delivered on the datasheet is usually related to product features, operating conditions / electrical characteristics and package dimensions. This information is very useful in a design as well as information for the replacement product.

Crystal oscillator circuits are often designed around relatively few standard frequencies like 3.579545 MHz, 4.433619 MHz, 10 MHz, 14.318182 MHz 17.734475 MHz, 20 MHz, 33.33 MHz, and 40 MHz. Nominal frequency oscillator crystals we often see on television, computers, etc., in which frequencies are used in the application of a frequency divider, frequency multiplier, and the Phase Locked Loop (PLL). A crystal oscillator datasheet would be very helpful in terms of design, repair and even replacement of the product.

In addition to the above oscillator frequencies, of course there are many more nominal frequencies, like 32 768 KHz, 40 KHz, 4MHz, 8 MHz, 12 10 MHz, 16 MHz, 20 MHz and higher frequencies. Crystals can be produced for the oscillation in a wide frequency range, from several kilohertz to several hundred megahertz. Many applications call for simple crystal oscillator frequency associated with some other desired frequency, so that hundreds of crystal frequency standard made in large quantities, for applications ranging from toys to high technology in various forms of packaging. What about the crystal oscillator datasheet for those who need it?

How to find the crystal oscillator datasheet?

The crystal oscillator online sellers usually provide information in the form of crystal oscillator datasheet. If you have a product serial number of the crystal oscillator, so, then you can find a datasheet of the product online, commonly available in the pdf file format. Alternatively, it could make a request to my friends in the electronic forums. If answered, you will usually be given a link to the destination.

Click image for 4 Pin 4 MHz Crystal Oscillator Datasheet

Download 4 MHz Crystal Oscillator Datasheet

Direct way to obtain the crystal oscillator datasheet via Google is by directly typing a word or phrase by giving quotes, “4 pin 4 MHz crystal oscillator datasheet“. Just select and open the link and then save the file if it matches what you are looking for. Hope this helps you to get the crystal oscillator datasheet.

See also: Solar Tracker Circuit – DC DC Converter Circuit

Quartz crystal oscillator is a stable frequency generator using a Quartz Crystal as a resonator. In the crystal oscillator circuit, frequency stability is one of the most important references, which is a factor in the ability of various load conditions to provide a constant output frequency.

Quartz crystal oscillator used in Quartz Crystal is very small and thin section, or a quartz wafer is cut with two parallel surfaces metallised to create the necessary electrical connections. End of the oscillation frequency is strongly influenced by the physical size and thickness of a piece of quartz crystal. So it is a very important parameter to be strictly controlled and known as the “characteristic frequency” of the crystal. Alternatively, in other words, the size and shape determine the frequency or crystal cannot be used on any other frequency.

Quartz Crystal Oscillator

The uses of quartz crystal oscillators are intended to reduce or even eliminate the lowest levels of the factors that can affect the frequency stability. The factors that most often appear to affect the output frequency stability, among others, variations in load, temperature, and the change in DC power supply. Selections of the proper components are used in a resonant feedback circuit may also increase the level of frequency stability included the amplifier output. Of course still has the limitations of the RC and LC tank circuits normally.

So a quartz crystal is the frequency determining device with a very high degree of stability that is generally used in some type of oscillator circuit known as a quartz crystal oscillator (XO).

Quartz Crystal Oscillator in Use

Colpitts Quartz Crystal Oscillator

Quartz crystal oscillator circuit below should work on the frequency range 1.5 MHz to 8 MHz. A 30 pF of trimmer capacitor is used to adjust the frequency slightly toward the center frequency. 2N3904 transistor functioning as a buffer amplifier to function as a stabilizer frequency and increase the power output. This crystal oscillator circuit can be easily modified to change the frequency of RC components (R1, C1, and C2). Any changes can be monitored by a frequency counter.

1.5 MHz-8 MHz Colpitts Quartz Crystal Oscillator Circuit

Pierce Quartz Crystal Oscillator

The most simple crystal oscillator circuit is the Pierce oscillator. An FET is used as a amplifying device, as it has a high input resistance, the use of a fence 10M resistance. The crystal has a frequency of 2000 MHz, but a reasonable crystal can be used. 3.3 mH the RF choke provides a high impedance to alternating current load, while the passage of the drain current without the DC voltage drop (the choke had a resistance of 41Ω). The choke must be specially designed to maintain the desired inductance, while wearing DC, so make sure you use the choke is designed for the purpose. The impedance of the coil is then 41k of 2 MHz, which is sufficient amplification.

2 MHz Pierce Quartz Crystal Oscillator Circuit

Thus, the examples of Quartz Crystal Oscillator Circuit in this usage may shed some light to understand the quartz crystal oscillator.

See also: Water Level Sensor Circuit – Crystal Oscillator

Crystal oscillator circuit is a simple oscillator circuit when we look at the schematic diagram. A crystal oscillator circuit is nothing but a replacement of an ordinary oscillator network, which is a combination of LC. This simplicity is also reflected in the number of physical components that are very compact, which occupy your printed circuit board. You live alone design the layout of components in such a way as to give the best results.

Based on experience in designing a crystal oscillator, I can say very easily. If it is limited to a curiosity about how a crystal oscillator circuit is working, then the frequency counter is readable display a very stable frequency. Without having to make a PCB, simply by connecting the pin connections between the components involved.

Colpitts Crystal Oscillator Circuit

However, for optimal results should be required data regarding the technical specifications of the crystal oscillator circuit, and the components involved. You can just download the datasheet the crystal oscillator, and if necessary for the transistor or integrated circuit (IC) as well. In addition, the layout of the components that also affect the quality of the output frequency. Here below are some of the crystal oscillator circuits for practical use.

32.768 KHZ Crystal Oscillator Circuit

32.768 KHz Crystal Oscillator Circuit

The following crystal oscillator circuit using a crystal to produce 32.768 KHz square wave output, and then fed to a 15 stage binary counter with 1 second square wave output. In the oscillator circuit diagram of the IC using a CMOS inverter 4069, to produce a better waveform, but a single transistor can be used. As a note, if you do not want to buy a 32.768 KHz crystal, can usually be found on a watch or computer mainboard that is damaged or not used anymore.

EM7604, Low Power Crystal Oscillator Circuit 32.768 KHz module can also be an option. EM7604 is an advanced low power CMOS circuit intended to be used together with a 32 768 kHz tuning fork crystal as a low-frequency clock oscillator. Except the crystal, no other external components are required. The device combines excellent oscillator stability with very low power consumption. It is guaranteed over a very wide supply voltage and temperature range. In order to Achieve a high-frequency accuracy, the matched crystals should have a ± 20ppm tolerance or tighter.

EM7604 - Low Power Crystal Oscillator Circuit 32.768 KHz

1 MHZ Crystal Oscillator Circuit

Crystal oscillator circuit with the output frequency of 1 MHz as a base frequency of a signal generator using TTL SN7490 decade counter IC. Basis of this frequency will be divided into several lower frequencies through a frequency divider 10 and 2.

1 MHz Crystal Oscillator Circuit

10 MHZ Crystal Oscillator Circuit

10 MHz Crystal Oscillator Circuit

See also: Water Level Sensor Circuit – DC DC Converter Circuit

If you want an oscillator frequency with high accuracy and very precise frequency, then the answer is a crystal oscillator. Electronic oscillator circuit is built through the mechanical resonance of the vibrating crystal of piezoelectric material. Piezoelectric resonator of the most commonly used is the quartz crystal material. So the type of oscillator is known as “crystal oscillator.”

The use of frequencies, usually a crystal oscillator used as a reference frequency. The use of a crystal oscillator in electronics such as a stable clock signal from a digital integrated circuit, a steady and stable frequency signal at the transmitter and receiver, and even very often found in quartz watches as a time tracker. Quartz crystals are also found inside test and measurement equipment, such as counters, signal generators, and oscilloscopes.

Crystal Oscillator and Quartz Crystal

Crystal Oscillator – Buy or Build

As stated already understood, that a crystal oscillator can be used as a reference frequency in a variety of electronic applications. Since it has a characteristic frequency of accurate and very stable. For the purposes of the use of practical, especially for the electronics world has two choices to buy a crystal oscillator package, or build it yourself using a quartz crystal in accordance with the desired frequency.

A crystal oscillator package is widely available commercially within a fairly wide frequency. It is packaged in a tin box and have some pins are available, and is accompanied by a crystal oscillator datasheet concerning the technical specifications and instructions. By purchasing this oscillator package seems very practical and ready to be used in accordance with the selected frequency.

This crystal oscillator product will be durable in use when it followed the requirements of its use, especially regarding the working voltage, and further guarantees and security, both physically and harmonic frequency output level is low, because it usually has an internal RF filter and packaged in a tin box that serves as a shield.

 << Buy Crystal Oscillator >>

When you want to build a good crystal oscillator is also not difficult just by a simple circuit using integrated circuit or transistor can have a resultant very stable frequency. For example, if you use the IC, then you need to datasheet of the IC and quartz crystals. Even in the datasheet has been accompanied by examples of the use of additional component’s table capacitors and resistors. IC is used to generate a low frequency while the transistor can be used up to frequencies of hundreds MHz.

10 MHz Crystal Oscillator Test Circuit

So the above explanation is to consider the job specification quartz crystal itself, and the active components are used. Due to an integrated circuit (IC) or a transistor having its own operating frequency range. For example, the application of Phase Locked Loop (PLL) ICs, and transistors can be used both, because the frequency range between hundreds of KHZ up to MHz.

<< Buy Crystal Oscillator >>

Crystal Oscillator Tutorial

Some sites that can be used as a reference to learn about how to build a good crystal oscillator, you can follow the link here and here. Happy studying and good luck in working with a crystal oscillator.

See also: Water Level Sensor Circuit -  Solar Tracker Circuit

DC DC converter circuit is an important part for portable electronic devices that use batteries as main power supply, such as laptop computers, mobile phones, and other such devices. As in the usual laptop needs a DC voltage range 19V-20V to operate and to use battery operation has been mounted internally or use external power supply with AC power as a source.

What to do when the only available as a source of DC power that is even much lower than 19V? Here, it takes a DC DC converter circuit by using a lower voltage to produce the required output voltage of 19V. Most DC to DC converter also regulated the output.

Another reason, the voltage drop due to the use of dry batteries. So that a sub-circuit is required to maintain a fixed output voltage equal to input voltage change to the lowest possible voltage levels. Switched DC DC converter circuit to offer this feature, including the use of laptops in the vehicle where the available input voltage 12V battery.

Car DC DC Converter Circuit Diagram

The following DC DC converter circuit can function as a laptop power supply and can be used to charge your laptop battery. It can be connected to the cigar lighter socket of the car to produce a supply of clean and stable DC 19V/5A, from a 12V battery supply. Enough and more for a laptop!

Car DC DC Converter Circuit

Car DC DC Converter Circuit - PCB - Parts List

This DC DC Converter uses a SMPS controller IC UC3843 in the design, which is a fixed frequency current-mode PWM controller. It is specially designed for Off-Line and DC to DC converter applications with minimum external components. For the voltage amplifier transistor, used as a driver BD139/BD140 pair to amplify the final IRL2505 MOSFET transistor. Visit the following site to build a DC DC converter circuit.

See also: Touch Switch Circuit – Solar Tracker Circuit.