552AJ000987DGR

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:	993.40969MHz
Frequency - Output 1:	873.515414MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Pin Configurable/Selectable Oscillators

The 552AJ000987DGR oscillator offers a great degree of flexibility in its pin configuration, allowing users to specify their oscillator’s output signal type, frequency range and its range of operating temperature. All oscillator frequencies are internally programmed, eliminating the need for external frequency setting resistors or resistors networks, making it ideal for use in industrial, automotive and computer-controlled electronics. Furthermore, the device contains Selectable/Pin Configurable software that may be used to configure oscillator output wave-forms from simple square wave signals to more complex sine waves and triangular waves.

Features

The 552AJ000987DGR provides users with a wide range of features:• An adjustable frequency range of 1.0kHz to 150KHz• Range of operating temperature from - 50°C to + 150°C• Built-in automatic compensation• Output wave-forms may be configured for sine, square and triangular wave signals• Configurable by Pin• Built-in programming software• On-chip power-on reset circuit provides reliable operation

Applications

The device is ideal for many applications, including:• High frequency oscillators• Frequency switching circuits• Clock generators• Timer circuits• Frequency measuring and tuning circuits• Low power applications

Working Principle

The 552AJ000987DGR operates by generating an oscillating signal using two internal PNP transistors. A voltage is applied to the base of the first transistor (Q1) which causes current to flow through it, creating a voltage drop across the resistor connected to the transistor’s collector. This creates a positive voltage at the collector and a negative voltage on the emitter. The negative voltage is then applied to the base of the second transistor (Q2) which in turn causes current to flow through it, creating a voltage drop across the resistor connected to the transistor’s collector. This creates a negative voltage at the collector and a positive voltage on the emitter. The positive voltage is then applied back to the base of the first transistor, which then causes a current to flow through it again creating a voltage drop across the resistor connected to its collector. This creates a positive voltage at the collector and a negative voltage on the emitter. The cycle then repeats itself infinitely, creating an oscillating signal at the frequency determined by the external components.

Conclusion

The 552AJ000987DGR offers users a wide range of applications and is an excellent choice for those seeking a reliable, flexible and configurable oscillator. The device’s internal selectable/pin configurable software makes it simple to configure the oscillator’s output waveforms and frequency range, while its range of operating temperature makes it a suitable choice for many industrial and automotive applications.

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