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Oscillating frequency is actual frequency of oscillation circuit which works with crystal. It is mainly determined by cristal unit and influenced by MCU, external load capacitance, stray capacitance of PCB and so on.
Oscillation frequency is calculated by below formula. fL : Load resonant frequency, fr : Resonant frequency, Cs : Load capacitance, C0, C1 : Equivalent circuit contents
It is important to measure frequency without any contact to oscillation circuit to prevent influence of probe and so on. Oscillation frequency will shift if probe touches to oscillation circuit by its capacitance.
Murata Manufacturing's crystal units provide outstanding quality, mass producibility, and cost effectiveness by utilizing our world-first proprietary packaging technology, which is not found in conventional crystal units.
Murata Manufacturing provides reference designs to quickly and efficiently support our customers' product development. Here, you can view a list of timing device products recommended by IC manufacturers.
Murata Manufacturing borrows the customer's mounted board and offers the optimum recommended circuit based on our evaluation of IC matching. Here, we explain our IC matching service and design support tool.
After logging in to my Murata, please click on "Request Sample" on the page for the specific part number of the product you want to request.
We describe the technical terms frequently used with crystal units such as the resonance frequency, equivalent circuits, and pulling sensitivity.
Explains the oscillation margin and how to calculate (determine) it, as well as how to measure or make a quick check of the negative resistance, etc.
Describes the drive level, explains how to calculate (determine) it, and gives an example of how to measure drive level, etc.
Describes the oscillation amplitude, shows what is required to measure it, and presents notes on things to consider, etc.
We describe the strengths of Murata's crystal units, which use our world-first unique packaging technology.
We describe selected products most suitable for your application among ceramic resonators (CERALOCK) and crystal units.
We provide support information by application for ceramic resonators (CERALOCK) and crystal units.
The software 'SimSurfing' simulates the characteristics of Murata products.