MAS9278

www.DataSheet4U.com DA9278.004 13 July 2006 MAS9278 IC for 10.00 – 30.00 MHz VCXO DESCRIPTION The MAS9278 is an integrated circuit well suited to build VCXO for mobile communication. The crystal offset trimming is done through a serial bus and the calibration information is stored in an internal PROM. To build a VCXO only one additional component, a crystal, is needed. Low Power Wide Supply Voltage Range True Sine Wave Output Very High Level of Integration Integrated Varactor Electrically Trimmable Very Low Phase Noise Low Cost FEATURES Very small size Minor current draw Wide operating temperature range Phase noise <-130 dBc/Hz at 1 kHz offset Programmable Vc sensitivity APPLICATIONS VCXO for mobile phones VCXO for other telecommunications systems Replacement for TCXO modules BLOCK DIAGRAM VC 2 OUT MAS9278 DA CLK PV VDD Digital 5 2 VSS X1 XO1 X2 1 (5) DA9278.004 13 July 2006 PIN DESCRIPTION Pin Description Power Supply Voltage Serial Bus Data Input Serial Bus Clock Input Programming Input Voltage Control Input Crystal Oscillator Output Power Supply Ground Crystal/Varactor Oscillator Input Buffer Output Symbol VDD DA CLK PV VC X1 VSS X2 OUT x-coordinate 177 435 201 1042 1012 374 830 817 665 y-coordinate 172 1015 1015 1015 158 158 1008 158 1015 Note: Because the substrate of the die is internally connected to GND, the die has to be connected to GND or left floating. Make sure that GND is the first pad to be bonded. Pick-and-place...