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CITIZEN FINEDEVICE 40MHz Crystal Unit ±30ppm 2-Pin 11.5 x 4.66 x 3.5mm

CITIZEN FINEDEVICE 9.21MHz Crystal Unit ±30ppm 2-Pin 11.5 x 4.66 x 3.5mm

CITIZEN FINEDEVICE 20MHz Crystal Unit ±30ppm 2-Pin 11.5 x 4.66 x 3.5mm

CITIZEN FINEDEVICE 18MHz Crystal Unit ±30ppm 2-Pin 11.5 x 4.66 x 3.5mm


Crystal units are used as resonators in [crystal oscillator](/web/c/semiconductors/crystals-oscillators-resonators/crystal-oscillators/) circuits and have a highly accurate frequency, tight tolerance and long-term stability. They come in a wide range of frequencies and provide the clock source. Specifications include resonance frequency, resonance mode, load capacitance and series resistance. The mode of oscillation in the resonance frequency operation is specified at the fundamental frequency or the third overtone.

### Crystal Unit Modes

Crystals have two resonance modes, parallel and series. Load capacitance is an important specification when using parallel-resonant oscillation mode. Oscillator circuits can tolerate some degree of series resistance. Metal, ceramic epoxy and plastic package variety for crystals offer excellent environmental and heat resistance. Applications of a crystal are found in mobile phones, clock circuit for microprocessors, GPS clocks, and ISM band radio frequency communications.



Crystal Units

Crystals, Oscillators & Resonators

Passive Components

1228569899

1805640584

1950438482

3047907070

3089561311

3379516231

3577158573

3702440375

3893962904

3999174723

4084450865

4292484756

595160564

607105215

1953764780

2854130884

3031041232

3694170890

4239710393

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Finedevice Crystal Units

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