416F271X2IST vs 416F271X3ADT
| Part Number |
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| Category | Crystals | Crystals |
| Manufacturer | CTS-Frequency Controls | CTS-Frequency Controls |
| Description | CRYSTAL 27.120 MHZ SERIES SMT | CRYSTAL 27.120 MHZ 18PF SMT |
| Package | 4-SMD, No Lead | 4-SMD, No Lead |
| Series | 416 | 416 |
| Type | MHz Crystal | MHz Crystal |
| Operating Temperature | -40°C ~ 85°C | -10°C ~ 60°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, No Lead | 4-SMD, No Lead |
| Size / Dimension | 0.063" L x 0.047" W (1.60mm x 1.20mm) | 0.063" L x 0.047" W (1.60mm x 1.20mm) |
| Frequency | 27.12MHz | 27.12MHz |
| Height - Seated (Max) | 0.018" (0.45mm) | 0.018" (0.45mm) |
| ESR (Equivalent Series Resistance) | 200 Ohms | 200 Ohms |
| Frequency Stability | ±20ppm | ±30ppm |
| Frequency Tolerance | ±15ppm | ±15ppm |
| Load Capacitance | Series | 18pF |
| Operating Mode | Fundamental | Fundamental |
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1. Why is quartz used in microchips?
The main reasons for using quartz in microchips include its multiple key roles in chip manufacturing and its unique physical and chemical properties.
Quartz has two main roles in chip manufacturing:
As a crystal oscillator: The crystal in quartz has certain mechanical elasticity and electrical properties, and can produce a specific form of mechanical oscillation under the action of an electric field. The frequency and stability of this oscillation are very high, making it very suitable as a time base for circuits such as electronic clocks, timers, and frequency synthesizers.
As a photolithography mask: In photolithography technology, quartz can be made into a high-precision, high-transparency mask, which is used to project the pattern on the chip onto the photoresist layer, and then transfer the pattern to the chip surface through etching.
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2. What is the crystal oscillator used for?
Crystal oscillators are mainly used to generate stable and accurate clock signals, and are widely used in various occasions that require high-precision and high-stability frequency sources. Crystal oscillators use the piezoelectric effect of quartz crystals to convert the resonant frequency of quartz crystals into electrical signal output through an oscillation circuit, thereby providing a high-precision and high-stability frequency source.
Working principle of crystal oscillators
The working principle of crystal oscillators is based on the piezoelectric effect of quartz crystals. When an electric field is applied, the quartz crystal will undergo mechanical deformation, which will generate an electric field and form mechanical vibration. The crystal oscillator converts this mechanical vibration into an electrical signal output through an oscillation circuit, thereby generating a stable frequency signal. -
3. What role does the crystal play in the circuit?
The role of the crystal in the circuit mainly includes the following aspects:
Role in the oscillator: In a series crystal oscillator, the main role of the crystal is to generate a stable oscillation frequency. As a resonant element, the crystal controls the oscillation frequency of the circuit through its natural frequency, ensuring the stability and accuracy of the oscillator.
Role in filters: Crystals can also be used to build filters, filtering out unwanted frequency components through their frequency selection characteristics, allowing only signals of specific frequencies to pass. This characteristic makes crystals very important in communications and signal processing.
Role in clock generators: Crystals play a key role in clock generators, generating accurate clock signals through their stable oscillation frequency. This signal is widely used in various electronic devices to ensure the synchronization and accuracy of the system.
Role in voltage-controlled oscillators (VCOs): In voltage-controlled oscillators, crystals work with varactor diodes to adjust the oscillation frequency by changing the voltage. This characteristic makes crystals very useful in devices such as communications and modems. -
4. Why do we use crystals in electronic products?
Crystals, especially quartz crystals, have a piezoelectric effect and can produce stable vibrations at a specific frequency. This characteristic makes crystals play a vital role in electronic devices. Specifically, the main roles of crystals in electronic products include:
Providing a stable reference frequency: Crystals are able to produce highly stable oscillation signals, which are essential for clock signals in digital circuits and high-frequency signals in analog circuits. Stable frequency ensures the normal operation and precise time control of electronic equipment.
Temperature stability: The inherent frequency stability of crystals is high and is less affected by changes in ambient temperature. This allows crystals to maintain stable performance under various environmental conditions, ensuring the reliable operation of electronic equipment.
Wide application: Crystals are not only used in oscillation circuits, but also widely used in electroacoustic musical instruments to ensure the accuracy and consistency of tone. In addition, crystals are used in various electronic products, such as computers, communication equipment, timers, etc.
Technological development: With the development of technology, crystals have gradually replaced early crystal oscillators because crystals have cost advantages and more demanding conditions of use than crystal oscillators. The core of the crystal is piezoelectric ceramics, which generate mechanical vibrations by applying voltage, thereby generating a stable frequency.
What is a crystal in a semiconductor?
A crystal in a semiconductor refers to a solid formed by the regular repetition of atoms, molecules or ions in three-dimensional space. This structure gives the crystal a long-range ordered atomic arrangement, exhibiting characteristics such as anisotropy and self-limitation.
Definition and characteristics of a crystal
A crystal is a solid formed by the regular repetition of atoms, molecules or ions in three-dimensional space. This long-range orderly arrangement gives crystals the following characteristics:
Crystallization uniformity: crystals show the same properties in any part.
Anisotropy: the properties measured along different directions of the crystal are not necessarily the same, such as electrical conductivity, thermal conductivity, optical properties, mechanical properties, etc.
Self-limitation: the crystal can spontaneously form a closed convex geometric polyhedron shape.
Symmetry: the same parts of the crystal, including crystal faces, crystal edges and crystal properties, can be repeated regularly in different directions or positions.
Minimum internal energy: under the same thermodynamic conditions, compared with gases, liquids and other non-crystals of the same composition, the crystal has the smallest internal energy, which also shows that the crystal is the most stable.
