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Pin Configurable/Selectable Oscillators
• Application Field
Pin configurable/selectable oscillators, or PSCOs, are programmable, frequency-controlled oscillators manufactured by Electronic Manufacturers Inc. (EMI). These oscillators are designed to provide consumers with a cost-effective and efficient means of frequency control and regulation. In addition, they have the capability of being configured to meet design specification requirements while preserving timing accuracy. PSCOs are a perfect choice for applications that require multiple frequency range and tight tolerances, like timekeeping modules, portable communication systems, and embedded systems.
• Working Principle
The working principle of these oscillators is based on their ability to be programmed and configured to generate frequencies meeting customer needs. This is done by controlling the frequency with a digital programming program. Depending on the device, the frequency of the PSCO can be chosen from three or four bands, or it can be infinitely variable. The band values are specified in the technical data sheets and are typically around 100kHz, 500kHz, and 500MHz. Some variable devices can reach even higher frequencies. Common input parameters include frequency range and accuracy, as well as output voltage.
When programming the oscillator, the user chooses a frequency band and then inputs the desired frequency and accuracy into the program. The program then automatically applies the selected configuration to the oscillator. This feature ensures that the programmed frequency range and accuracy requirements are met. The benefit of this feature is that the user does not have to manually set up or recalibrate the oscillator each time.
• Advantages
The main advantages of PSCOs include cost and ease of use. The oscillators require a minimal amount of soldering and programming; all that is needed is for the user to select the appropriate frequency band and accuracy. Other advantages include their low power consumption, robustness, and accuracy in frequency control. Additionally, these oscillators have wide frequency range and tight tolerance, making them perfect for a wide variety of applications.

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