402F25011CAT

Series:	402
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Type:	MHz Crystal
Frequency:	25MHz
Frequency Stability:	±10ppm
Frequency Tolerance:	±10ppm
Load Capacitance:	10pF
ESR (Equivalent Series Resistance):	100 Ohms
Operating Mode:	Fundamental
Operating Temperature:	-20°C ~ 70°C
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	4-SMD, No Lead
Size / Dimension:	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max):	0.022" (0.55mm)

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Crystals: 402F25011CAT Application Field and Working Principle

Crystals are substances with a three-dimensional symmetrical repeating structure built of ions and molecules. They are a type of inorganic solid material which form due to the orderly and repetitive packing of atoms or ions. Crystals belong to the classification of solids, and their properties are commonly known as "crystal properties". The 402F25011CAT Crystal is a type of crystal produced by Shenzhen Hanwin Electronic Technology Co., Ltd. It is a specialized provider of low-kV crystal products. In terms of size, the 402F25011CAT is a miniature crystal with a nominal frequency of 25MHz and a frequency tolerance of ±20ppm. In terms of clock accuracy and stability, its frequency temperature coefficient, aging rate and frequency tolerance are among the best in all types of crystals. In terms of application fields, the 402F25011CAT is widely used in digital products, communication devices, auto electronics, medical equipment, instruments, calculators and audio products. This crystal is also good at separating and receiving strong signals, so it can be used to detect missing pulses in mobile phones. Moreover, one of its main applications is controlling the clock frequency of modern high-end chips.In terms of working principle, the 402F25011CAT crystal uses a high-precision quartz crystal unit as the core. After the quartz rod is cut according to certain matching conditions, electrodes are attached to both ends of it, and then the connection capacitor is connected. A reliable oscillator oscillation circuit is formed, which will adjust its electrical characteristics according to the different effective capacitance of the oscillator circuit. Finally, it can output an accurate and stable square wave signal. The exact working method of the 402F25011CAT crystal oscillator can be further divided into four steps. First, the quartz crystal is subjected to a mechanical stress. This is because the quartz crystal is easily deformed under the action of external forces, and the variation in size affects the frequency of vibration. Therefore, the vibration frequency of the crystal can be easily changed by adjusting the mechanical stress. The second step is to create a high impedance state. In this step, a high impedance oscillator circuit is connected to the quartz crystal to make it easier to detect its resonance frequency. The third step is the detection of oscillation amplitude. In this step, the oscillation amplitude of the quartz crystal is detected as a reference value. The relative motion between the electrodes and the quartz crystal directly affects the deformation of the crystal and thus its resonant frequency. The last step is the adjustment of resonance frequency. By adjusting the oscillator circuit to change the effective capacitance of the quartz crystal, the frequency of the oscillator can be fine-tuned to obtain an accurate clock frequency.In conclusion, the 402F25011CAT Crystal is a high-precision miniature crystal produced by Shenzhen Hanwin Electronic Technology Co., Ltd. It has excellent frequency temperature coefficient, aging rate and frequency tolerance, making it suitable for use in many electronics-related fields. In addition, its working principle is based on the mechanical stress and oscillation amplitude of quartz crystal, which allow it to produce accurate and stable clock signals.

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