7C-77.760MBE-T

Oscillators

Oscillators are devices used to generate a repeated signal. The signal can be either electrical, physical or mechanical in nature. Examples of oscillators include quartz crystal oscillators, rotary engines, alternators, spark generators, electric transformers and thermionic vacuum tubes. Each type of oscillator has its own set of characteristics and applications.

7C-77.760MBE-T application field and working principle

The 7C-77.760MBE-T oscillator is an example of a miniature BiCMOS oscillator designed to provide precise frequency control. It utilizes two CMOS switching transistors and a quartz crystal resonator to produce a precise frequency. The oscillator utilizes a TTL compatible logic input for frequency adjustment, making it convenient for use in both embedded or standalone systems. Its high precision and wide temperature stability make it suitable for a variety of applications such as clock and data systems, Wi-Fi, and Bluetooth.

The 7C-77.760MBE-T oscillator operates in a closed loop system. When power is applied, the first switching transistor is turned on and signal is transmitted from the quartz crystal resonator. The transmitted signal is then amplified by another switching transistor and fed back to the resonator. The resonator is designed to vibrate at a certain frequency determined by the value of the crystal, and thus a signal of a fixed frequency is produced.

The output frequency can be adjusted by varying the Frequency Control Register (FCR) input, which is a TTL compatible logic input. The FCR input is used to set the frequency offset in terms of a certain percentage ratio of the rated nominal frequency of the crystal. Thus, by varying the FCR input, the output frequency of the 7C-77.760MBE-T oscillator can be precisely adjusted to provide the desired frequency.

Conclusion

The 7C-77.760MBE-T oscillator is a reliable CMOS oscillator designed to provide precision and stability at wide operating temperature. It is suitable for applications such as clock and data systems, Wi-Fi, and Bluetooth. The high precision and wide temperature stability make it an attractive choice for a variety of applications.