552AH000122DG

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:	125MHz
Frequency - Output 1:	106.25MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tray

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Pin Configurable/Selectable Oscillators

Pin configurable/selectable oscillators, including 552AH000122DG, are oscillators with essential parameters that can be selected from respective pins. Conventional oscillators require different designs for different oscillation frequencies; pin configurable/selectable oscillators, however, can cover a wide range of frequencies and temperature perturbations with the same design. By applying different logic values to the pins, the oscillator can adjust the output frequency accordingly. Their flexibility and convenience have made them particularly popular in various electronic systems.The 552AH000122DG is a high-performance 40MHz oscillator with CMOS-compatible input-signal-dependent frequency accuracy and electrical characteristics. This oscillator is capable of working at all temperatures, providing a wide range of application, such as testing equipment, portable communications, small peripherals, robotics, military and aerospace systems, instrumentation and loop-time-measurement applications.Pin configurable/selectable oscillators, such as 552AH000122DG, work by applying logic values to the respective pins for the selection of output frequency and corresponding parameters. This technique involves dynamically varying the electrical characteristics of the flip-flop, either through the internally driven bias voltage or by the external circuitry. The frequency selection of 552AH000122DG oscillator involves applying logic values to the select and bias pins, which are typically used for selecting the output frequency. The output frequency of 552AH000122DG is a function of the logic levels on the select and bias pins and is given by the following equation:Fout = (Vth - Vbias)*KWhere Fout is the output frequency, Vth is the threshold voltage, Vbias is the bias voltage, and K is a constant. Since the threshold voltage of the CMOS flip-flop varies with temperature, the frequency varies accordingly. The temperature coefficient of 552AH000122DG oscillator is designed to be very low so that it can maintain a good frequency stability at various temperatures. This is accomplished by using compensation capacitors on each pin to stabilize the threshold voltage.The 552AH000122DG oscillator also has a wide dynamic frequency range from 25 to 140 Hz and an input voltage range from 2.7 to 4.5 V. Its power supply requirements are low, typically 10 mA at 5 V or 8 mA at 3.3 V. It has a low noise level of 6ns max at -20°C to +70°C, and provides an excellent jitter of 3ps max. In summary, pin configurable oscillators, such as 552AH000122DG, are a perfect solution when an oscillator needs to be adjustable to different frequencies, temperatures and electrical characteristics. They are highly flexible and can be easily programmed to the desired outputs. Coupled with its wide dynamic frequency range, low power consumption, and low noise and jitter levels, 552AH000122DG is one of the most popular pin configurable/selectable oscillators in the market today.

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