SIT9121AI-1D1-33E156.332033Y

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	35mA
Height - Seated (Max):	0.039" (1.00mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	69mA
Operating Temperature:	-40°C ~ 85°C
Series:	SiT9121
Voltage - Supply:	3.3V
Output:	LVPECL
Function:	Enable/Disable
Frequency:	156.332033MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The SIT9121AI-1D1-33E156.332033Y is an oscillator, which belongs to a system-in-package (SiP) family of devices that provide integrated circuit solutions for real-time clocks, programmable timers, frequency synthesizers, and clock buffers. It is an integrated, CMOS-based oscillator that requires minimal external circuitry and provides superior phase noise and frequency accuracy over a wide frequency range. The device is a highly-integrated, fully-automated, programmable oscillator based on the latest integrated circuit technology and advanced frequency synthesizer techniques.

Application Field

The SIT9121AI-1D1-33E156.332033Y oscillator is primarily used for the generation and control of clock and frequency signals. The oscillator can be applied in communication systems, audio/video systems, automotive systems, and consumer products. It is especially suitable to provide high-accuracy frequency reference for baseband parts of cellular radios, digital communication systems, digital broadcast systems, etc. The oscillator can also be used in a variety of applications, such as clock/data synchronization of computer systems, digital signal processing systems, digital video broadcast systems, cable television systems, and sensor networks.

Working Principle

The SIT9121AI-1D1-33E156.332033Y oscillator operates by generating a stable quartz crystal-based reference signal via a voltage-controlled oscillator (VCO). The output frequency is generated by the VCO and can be adjusted through a programmable, tunable divider. The oscillator incorporates a highly linear phase-locked-loop (PLL) based on a dedicated microcontroller unit, providing superior phase noise and frequency accuracy over a wide frequency range.The oscillator works by generating an oscillating waveform of specific frequency, which is then divided in an integer ratio to produce a scaled-down version of the original signal. This scaled-down signal is then compared to an internal reference signal to generate an error signal used to modify the oscillator\'s frequency until it matches the reference signal. This method of frequency control allows the oscillator to generate precisely-controlled output signals.

Conclusion

In conclusion, the SIT9121AI-1D1-33E156.332033Y oscillator is an integrated SiP device, optimized for providing superior phase noise and frequency accuracy over a wide frequency range. It has a wide range of applications in communication, audio/video, automotive, and consumer products to generate and control clock and frequency signals. The oscillator operates by generating a stable quartz crystal-based reference signal via a VCO and adjusting the output frequency through a programmable, tunable divider. The oscillator also incorporates a highly linear PLL based on a dedicated microcontroller unit.

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