CM309E16000000ABIT

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Crystals

Crystals are widely used in electrical, mechanical, and acoustic devices such as watches, radios, speakers, and televisions. Quartz crystals, in particular, are commonly used in a wide range of electronic components, including oscillators and frequency synthesizers. The CM309E16000000ABIT Crystal is a subminiature quartz crystal manufactured by CML Microcircuits. It is an ultra-accurate, low-cost device with superb stability and an extended operating temperature range. In this article, we will discuss the application field and working principle of the CM309E16000000ABIT Crystal.

Application Field

The CM309E16000000ABIT Crystal is ideal for applications requiring high frequency accuracy in an ultra-small form factor due to its excellent stability, low cost, and extended temperature range. It is commonly used in consumer electronic products, including car navigation systems, GPS systems, digital cameras, PDAs, cellular phones, and computers. It is also used in medical equipment, security devices, test and measurement instruments, audio and video devices, and telecom systems.

The CM309E16000000ABIT Crystal is specifically designed for AT-E and AT-U type crystal-controlled oscillators. It uses a Cassegrain-type resonator structure, which helps to maintain highly stable frequency output over a wide temperature range. It also has an ultra-small form factor, with an overall height of 0.25mm, and a footprint of 1.6mm by 0.8mm. This makes it ideal for space-constrained applications where a high frequency accuracy is required.

Working Principle

The CM309E16000000ABIT Crystal is a Cassegrain-type crystal oscillator. It works in 2 stages. In the first stage, a small quartz crystal is enclosed in a small metal housing, with two metal electrodes on the bottom of the quartz crystal. This arrangement forms a piezoelectric circuit, through which electric charges are converted directly into physical vibrations. The crystal vibrates in an extremely predictable and consistent manner, resulting in very accurate and reliable timing signals.

In the second stage, these vibrations are further amplified by an electromechanical oscillator, allowing for a much wider frequency range and greater frequency stability. The CM309E16000000ABIT Crystal is designed to be used in AT-E and AT-U type oscillators, which integrate the two stages in one package. This enables a wide range of frequencies and a very stable performance over a wide temperature range.

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