CM309E20480000ABJT

Series:	CM309E
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	MHz Crystal
Frequency:	20.48MHz
Frequency Stability:	±50ppm
Frequency Tolerance:	±30ppm
Load Capacitance:	18pF
ESR (Equivalent Series Resistance):	40 Ohms
Operating Mode:	Fundamental
Operating Temperature:	-10°C ~ 60°C
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	4-SOJ, 9.60mm pitch
Size / Dimension:	0.461" L x 0.157" W (11.70mm x 4.00mm)
Height - Seated (Max):	0.146" (3.70mm)

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Introduction

CM309E20480000ABJT, or simply CM309E, is a highly optimized sensing crystal that can be used in a variety of applications. It is a highly sensitive crystal with excellent frequency accuracy, stability over a wide temperature range, and a range of mounting options. CM309E is an ideal choice for demanding applications requiring highly accurate frequency and reliability over a wide temperature range.

Application Field

CM309E has a wide range of applications in various industries, ranging from instrumentation, industrial and consumer markets to consumer electronics, automotive, and telecommunications. The most common applications of CM309E crystal include sensors, frequency dividers, filter networks, oscillators, and frequency reference circuits. CM309E crystals are used in various sensors, including optical sensors and piezoelectric sensors. Optical sensors are used in image capture systems and microscopy, while piezoelectric sensors measure pressure, acceleration, and vibration. CM309E crystals can also be used in gyroscopes and angular velocity sensors. In the consumer electronics market, CM309E crystals are used in consumer audio applications, such as digital audio players and gaming consoles. They are also used in PCs, MP3 players, and cell phones. In the automotive industry, CM309E crystals are used in automotive applications, such as engine timing and speed control. CM309E crystals are also used in airbag deployment systems, keyless entry systems, and anti-theft systems. In the telecommunications market, CM309E crystals are used in radio transmitters and receivers, frequency reference oscillators, and base stations.

Working Principle

CM309E crystals operate on the principle of piezoelectricity. Piezoelectricity is the application of a voltage to a crystal, resulting in an electric field that is proportional to the pressure applied to it. When a CM309E crystal is placed between two metal plates and a voltage is applied to the plates, the crystal will bend in response to the electric field, creating a mechanical vibration. The vibration and frequency of the crystal are determined by its dimensions and the amount of voltage applied. By selecting the appropriate dimensions, it is possible to tailor the properties and performance of the CM309E crystal to meet specific application requirements. CM309E has an inherent stability over a wide temperature range. This stability allows for highly reliable frequency accuracy and stability, which is very important in applications such as sensor and frequency reference circuits.

Conclusion

CM309E is an excellent choice for applications that require highly reliable frequency accuracy and stability over a wide temperature range. It is a highly sensitive crystal with excellent frequency accuracy and precision, making it a reliable solution for a variety of industrial and consumer sensors, frequency dividers, filter networks, oscillators, and frequency reference circuits.

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