655P156H5C3T

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Oscillators are electronic pulse circuits that generate an oscillating electric current or voltage and may be either a free-running or controlled oscillator. The 655P156H5C3T oscillator belongs to the 655 series of oscillators produced by STMicroelectronics. It is designed to deliver accurate frequency control with minimized jitter, low-phase noise and wide frequency range selection.

The 655P156H5C3T oscillator is available in 4 packages, which includes a surface-mounted package (100 LQFP) and two through-hole packages (50 LQFP and 8 PDIP). It has two different operating modes: crystal oscillator and VHC oscillator modes. In crystal oscillator mode, it operates with an external crystal for better frequency stability and potentially reduced phase noise. In VHC oscillator mode, it operates with an external resistor and capacitor for higher frequency range selection and frequency stabilization.

The 655P156H5C3T oscillator is ideal for use in microprocessor based applications such as embedded systems, routers, servers and computers. It is also suitable for other applications that require accurate frequency control, such as communications, audio and video equipment, medical devices and automotive electronics. Its features include low power consumption, low voltage operation, high frequency stability and wide temperature operations.

The working principle of the 655P156H5C3T oscillator is based on a linear feedback oscillator circuit. The oscillator is driven by a high gain amplifier and an oscillator circuit, which consists of an RC network and a voltage-controlled current source (VCIS). The VCIS generates a current proportional to the input voltage. This current is then fed into the RC network, which acts as a low pass filter, and the output is then fed back to the amplifier.

The frequency of the oscillator is determined by the RC network and the voltage-controlled current source. The amplifier provides gain and the RC network determines the frequency range. The voltage-controlled current source ensures the frequency stability and accuracy of the oscillator. The 555P156H5C3T oscillator can be adjusted using an external resistor and capacitor from a wide frequency range.

In conclusion, the 655P156H5C3T oscillator is a suitable choice for applications that require accurate frequency control and stable frequency. It is capable of providing high frequency stability and wide temperature operations with minimized jitter, low-phase noise and wide frequency range selection.

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