View nj88c33 datasheet:

DS2429 - 3.2 NJ88C33 FREQUENCY SYNTHESISER (I2C BUS PROGRAMMABLE) WITH CURRENT SOURCE PHASE DETECTOR OUTPUTS The NJ88C33 is a synthesiser circuit fabricated on GPS's 1.4 micron CMOS process, assuring very high performance. It is I2C compatible and can also be programmed at up to 5MHz. It contains a 16-bit R counter, a 12-bit N counter and a 7-bit A counter. A digital phase comparator gives improved loop stability with current source outputs to reduce loop components. A voltage doubler is provided for the loop driver to improve control voltage range to the VCO when operating at low supply voltages. DP14 FEATURES Easy to Use Low Power Consumption (15mW) Single Supply 2.5V to 5.5V Digital Phase Comparator with Current Source Outputs MP14 Serial (I2C Compatible) Progr