MC-306 31.9990KA-G: ROHS

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Crystals

Crystals are widely used in all sorts of electronic application including frequency control, timing, switching and signal transfer. They can be divided into two main categories: mechanical resonator and electronic resonator. The MC-306 31.9990KA-G is an example of electronic resonator which works based on the piezoelectric effect.

Piezoelectric Effect

Piezoelectricity is the phenomenon by which certain materials, when stressed, generate an electric potential. On the other hand, when subjected to an electric field such materials will experience a mechanical deformation. This effect is well known in quartz crystals, when a voltage is applied to a quartz crystal, it will change its shape and determine a different frequency of oscillations.

In the MC-306 31.9990KA-G, the piezoelectric effect is used to create an oscillator. It is a high performance oscillator that exhibits excellent frequency stability, low jitter and very low aging.

ROHS Directive

The MC-306 31.9990KA-G is compliant with the Restriction of Hazardous Substances Directive 2002/95/EC (RoHS). RoHS is a European legislation that places restrictions on the use of certain hazardous substances in electrical and electronic equipment. The RoHS restricts the use of lead, cadmium, mercury, polybrominated biphenyls (PBB’s), polybrominated diphenyl ethers (PBDE’s), hexavalent chromium and polycyclic aromatic hydrocarbons (PAH’s).

The MC-306 31.9990KA-G is RoHS compliant and therefore suitable for applications where RoHS environmental constraints are required. This makes it an ideal choice for high-performance modules in a wide range of products.

Working Principle

The MC-306 31.9990KA-G is an AT-cut crystal oscillator. AT-cut crystals are cut at an angle which is usually between 30 and 40 degrees, to form a diamond shaped crystal unit. This design yields better temperature stability and higher resonance frequency.

The MC-306 31.9990KA-G consists of a quartz crystal sandwiched between two metal electrodes. The vibrational frequency of the crystal is determined by the size and shape of the quartz crystal, as well as the load capacitance. When an external electric field is applied, the crystal starts to vibrate, thus producing an oscillating electrical signal with a fixed frequency.

The MC-306 31.9990KA-G works on a frequency range of 1.500 MHz to 33.000 MHz with a crystal frequency tolerance of ±10 ppm. Its fundamental operating frequency is 31.9990 KHz with a load capacitance of 15 pF and a drive level of 10 μW.

Application fields

The MC-306 31.9990KA-G offers superior performance in harsh application environments due to its RoHS directive compliance and excellent frequency stability. It is therefore suitable for use in a variety of application fields such as computing, telecommunication, wireless communication, industrial electronics, consumer electronics and automotive.

The MC-306 31.9990KA-G is commonly used in frequency control, timing, switching and signal transfer applications including cellular phones, GPS, modems, routers, HDTV, set-top boxes, AC/DC power converters, gaming consoles, motor control, displays, security systems and X-ray equipment.

In conclusion, the MC-306 31.9990KA-G is an AT-cut quartz crystal oscillator that meets the requirements of the RoHS directive. It is ideal for use in a wide range of electronic applications due to its excellent frequency stability and reliability in harsh environments.

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