552AH000449DG

Function:	Enable/Disable
Current - Supply (Disable) (Max):	75mA
Package / Case:	6-SMD, No Lead
Height:	0.071" (1.80mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Current - Supply (Max):	130mA
Operating Temperature:	-40°C ~ 85°C
Frequency Stability:	±20ppm
Voltage - Supply:	3.3V
Output:	LVPECL
Series:	Si552
Frequency - Output 4:	--
Frequency - Output 3:	--
Frequency - Output 2:	716.5732MHz
Frequency - Output 1:	709.526MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tray

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Pin Configurable/Selectable Oscillators

Oscillators are key components in most of the control and timing circuits. Their importance is indisputable, because they stabilize the operation of the entire circuit and provide precision in the timing of sequential operations. Pin configurable or selectable oscillators are a popular option when it comes to selecting the right oscillator for a particular application. Obtaining the right frequency is just a matter of selecting the right pins on the oscillator. The 552AH000449DG is a member of this family of oscillators, and it is important to understand its application field and working principle.The 552AH000449DG is a temperature-compensated oscillator (TCXO) with selectable frequency. This TCXO is a highly stable and reliability device that can be used in applications where RF transmissions are required and exceptional phase noise performance is essential. There are nine different frequency options available with this oscillator, ranging from 12 MHz to 68MHz. This allows for plenty of flexibility when the oscillator is being tailored for the desired application.The 552AH000449DG offers two ECL compatible digital compatible High/Low select pins, allowing the user to choose up to four separate output frequencies. The device is also equipped with a serial logic input pin to control the digital logic used to determine which frequency setting is output. This allows users to switch between different frequencies quickly and easily program a signal.The working principle of the 552AH000449DG is relatively simple. The oscillator consists of an undamped LC circuit which is connected to a transistor. The ringing frequency in the LC circuit determines the oscillation frequency of the output. By controlling the select pin, the impedance of the LC circuit can be altered, changing the frequency of the output signal. The select pins also determine the voltage levels that the output signal is generated at. This is another factor taken into account when choosing the right oscillator. For instance, if a low voltage application is desired, then the 552AH000449DG would be the perfect choice. The output signal always has to be amplified beyond this low voltage to meet the requirements of most applications.The 552AH000449DG is a good choice for applications where reliability and frequency stability is essential. Its wide range of output frequencies make it easy to use in many different types of control and timing circuits. As it is an ECL compatible device, integration into existing systems is also easy. The fact that it can be digitally programmed to switch between two separate frequencies, with up to four different options, makes it even more flexible and easily tailored to the desired application.

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