M685-02-AE-AH

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Pin Configurable/Selectable Oscillators (PCS/SO) enable users to customize and select their required frequencies and characteristics for their system clocks with great ease and flexibility. This article will focus on a specific product within this range, the M685-02-AE-AH, and delve into the range of applications and its working principle.

The M685-02-AE-AH is an ultra-low power oscillator that is highly reliable and offers very low jitter and skew over an extended frequency range. It is a low profile, tiny surface-mount device and is available in a variety of frequency ranges and tolerance options. It is also one of the few devices of its kind that is compliant to safety standards CE and FCC.

This device is ideal for use in many applications such as cellular phones, handheld devices, personal digital assistants (PDAs), laptop computers, digital video recorders (DVRs), set-top boxes and many more. It can be used in logic designs, power management, D/A/A-D conversion and other applications where low power and low jitter are important.

The key feature of the M685-02-AE-AH is its built-in frequency selection capability, which enables the user to choose from a range of frequencies with the help of two pins. During selection, the pins on the device configure the oscillator without needing any external circuitry. An external resistor is also provided to provide additional fine tuning of the frequency.

The working principle of this device is very simple and efficient. It utilizes a quartz crystal as its resonator, which is coupled to the active circuit to make the oscillator work. The frequency of the oscillator is determined by the resonant frequency of the crystal, which is dependent on its capacitance and inductance. By altering the capacitance and inductance of the crystal, the user can adjust the frequency of the oscillator.

The M685-02-AE-AH is driven by a master oscillator, which is controlled by an oscillator circuit based on a ring oscillator. A control logic is used to adjust the reference frequency of the master oscillator and to select the desired frequency range. It then passes the selected frequency to the oscillator through a divider and filters the output frequencies to ensure low distortion.

Additionally, the device employs a dual-modulus counter that enables the user to select either one of the two available frequencies by setting the value of the variable resistor. This further enhances the user’s flexibility in selecting the precise frequency desired.

In conclusion, the M685-02-AE-AH is a versatile PCS/SO that offers a wide frequency range, high stability and low power consumption. It is ideal for many applications that require low-power and highly precise timing signals, and its selection procedure is quick and easy. Moreover, its built-in frequency selection capability adds to its flexibility.

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