SIT8009BCU21-25S

Series:	SiT8009B
Part Status:	Active
Base Resonator:	MEMS
Type:	XO (Standard)
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Available Frequency Range:	115MHz ~ 137MHz
Function:	Standby
Output:	HCMOS, LVCMOS
Voltage - Supply:	2.25 V ~ 2.75 V
Frequency Stability:	±20ppm
Frequency Stability (Total):	±20ppm
Operating Temperature:	-20°C ~ 70°C
Spread Spectrum Bandwidth:	--
Current - Supply (Max):	6.4mA
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	4-SMD, No Lead
Size / Dimension:	0.126" L x 0.098" W (3.20mm x 2.50mm)
Height:	0.032" (0.80mm)
Current - Supply (Disable) (Max):	4.2mA

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Programmable Oscillators

Programmable oscillators have a wide range of application fields, from telecommunications to medical electronics, and from radio communications to industrial controlling. SIT8009BCU21-25S is one of such programmable oscillators, and in this article we will discuss its application fields and working principle. Applications of SIT8009BCU21-25SSIT8009BCU21-25S is a programmable oscillator designed for use in highly demanding fields of communications and telecommunications, such as base stations, data communications and mobile communications. With a switching frequency falling within the range of 5.5 MHz to 20 MHz and an operating voltage ranging from 1.8 to 5.0V, the SIT8009BCU21-25S is specifically tailored for use in GSM and CDMA mobile networks. This oscillator has a total operating range of -40°C to +85°C, meaning it can withstand temperature variations without compromising its performance and reliability.Apart from telecommunications, SIT8009BCU21-25S can be used in medical electronics, such as pulse oximeters and intra-ocular lenses. It is also used in RFID readers, digital watches, modems and cable TV converters.Working Principle of SIT8009BCU21-25SThe SIT8009BCU21-25S is a crystal oscillator that is based on a crystal-oscillator circuit with an integrated PLL circuit. This provides excellent stability and frequency accuracy, and ensures that the frequency output is synchronized with the reference signal. The oscillator uses an external 32.768 kHz crystal for a reference signal and an integrated voltage-controlled oscillator. This integrated oscillator is used to produce a high-frequency sinusoidal output. The output voltage is controlled by the voltage applied to the external capacitor. The PLL circuit has a wide range of control signals, enabling it to adjust the output frequency with a high degree of accuracy. By changing the voltage of the external capacitor, the PLL can select different frequencies, ranging from 5.5 MHz to 20 MHz. This allows the user to tailor the oscillator to the current application and ensure that it operates at the optimal frequency.The SIT8009BCU21-25S is a low noise oscillator that is designed to provide a low jitter and stable output. It provides an excellent level of noise and phase noise performance, which ensures that the reference signal is accurately maintained without any interruptions or distortions in the output.ConclusionIn conclusion, the SIT8009BCU21-25S is a programmable oscillator designed for use in highly demanding fields of communications and telecommunications. It has a switching frequency of 5.5 MHz to 20 MHz and an operating voltage of 1.8 to 5.0V, making the SIT8009BCU21-25S suitable for use in GSM and CDMA mobile network applications. It also has use in medical electronics, RFID readers, digital watches, modems, and cable TV converters. This oscillator uses an external 32.768 kHz crystal for a reference signal and an integrated voltage-controlled oscillator, which is used to produce a high-frequency sinusoidal output. The oscillator has a low noise, low jitter and stable output, providing an excellent level of noise and phase noise performance.

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