TD-66.667MDE-T

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Oscillators -- TD-66.667MDE-T Application Field and Working Principle

TD-66.667MDE-T is a high-performance, low-power CCM-PLL clock oscillator which features a miniature 3.2mm x 2.5mm SMD package with only 1.2mm height. It is particularly suitable for applications that need to be integrated in a variety of portable and handheld devices.

Application Field

With its small size, and very low current consumption, the TD-66.667MDE-T is an ideal choice for integration into mobile and peripheral devices, including portable computers, games consoles, and GSM/GPRS mobile telephones where it is used to provide a stable and accurate clock source in PLL circuit. This oscillator has also been used in a variety of applications such as robotics, automotive, medical, broadcast, instrumentation, and laboratory equipment.

Working Principle

The TD-66.667MDE-T oscillator operates on the principle of the Constant Current Mode (CCM) phase locked loop (PLL) circuit. This circuit consists of an oscillator, a frequency divider, and a voltage-controlled oscillator (VCO). The VCO is modulated by voltage signals from the PLL filter which is a combination of the charge pump, discrete components and loop filter. The output of the PLL is the phase and frequency which is locked and generated by the VCO.

The TD-66.667MDE-T has its frequency range from 66.667MHz to 70.000MHz. Within this range, it has an operational temperature range from -40°C to 85°C, and a supply voltage of 2.5V ± 5%. It also features a long term on-board frequency stability of ±30ppm, and a fast start-up time of 1ms.

In addition to CCM-PLL mode, TD-66.667MDE-T can also be used in Crystal Oscillator (XO) mode when no PLL is needed. In this mode, the oscillator operates with a frequency source from an external crystal and is adjustable over a wide frequency range by using a single resistor.

Conclusion

The TD-66.667MDE-T is an excellent clock oscillator with its small size, low current consumption and wide range of operational temperatures. It is especially suitable for integration into mobile and peripheral devices, as well as a variety of applications, such as robotics, automotive, medical, broadcast, instrumentation, and laboratory equipment. With its state-of-the-art CCM-PLL circuit and adjustable frequency range, the TD-66.667MDE-T can provide a stable and accurate clock source to any system that needs precise timing.

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