Programmable Oscillators

Programmable oscillators are a kind of oscillator with programmable output frequency. The SIT8008BIT7-25N is one of the most commonly used programmable oscillators produced by SiTime Corporation. It has a wide range of uses in traditional electronic clock and data communications applications, as well as a wide range of embedded applications. This article will discuss the application field and working principles of SIT8008BIT7-25N.

Application Field

The SIT8008BIT7-25N programmable oscillator is a standard clock device with a single output enabled by a selectable frequency. It has a range of possible output frequencies from 24 to 25MHz, and is suitable for traditional clock generation, radio clock generation, data communication and microprocessor applications. It is also suitable for embedded applications such as memory, display/graphics and network communications.

Working Principle

The working principle of the SIT8008BIT7-25N is based on the use of a phase-locked loop (PLL) integrated circuit operating in a closed loop. This type of oscillator uses the combination of voltage-controlled oscillator (VCO) and frequency divider (FD) elements to achieve stable operation. The input signal is applied to the VCO, which then produces an output waveform at a frequency determined by the settings of the frequency divider. The output waveform is then compared with the input waveform, and any differences are corrected by the PLL circuit, ensuring that the output waveform is a pure sine wave.

In addition to the PLL circuit, the SIT8008BIT7-25N includes an integrated logic circuit to decode the serial programming data. This enables the output frequency of the oscillator to be quickly and easily reconfigured to any within its range. The programming data is sent to the logic circuit via a simple serial data line, and this then controls the settings of the frequency divider.

Conclusion

The SIT8008BIT7-25N programmable oscillator is a reliable and low-cost device for applications requiring a stable output frequency. It has a wide range of possible output frequencies, enabling it to be used for a variety of traditional and embedded applications. The working principle of the oscillator is based on the use of a phase-locked loop circuit and frequency divider, ensuring a pure sine wave output.