The device features a singleended current source/sink phase detector A output and a doubleended phase detector B output. Both phase detectors have linear transfer functions (no dead zones). The maximum current of the singleended phase detector output is determined by an external resistor tied from the Rx pin to ground. This current can be varied via the serial port. The MC145192 phase/frequency detector B R and V outputs can be powered from 2.7 to 5.5 V. This is optimized for 3.0 V systems. The phase/frequency detector A PDout output must be powered from 4.5 to 5.5 V, and is optimized for a 5 volt supply. This part includes a differential RF input which may be operated in a singleended mode. Also featured are onboard support of an external crystal and a programmable reference output. The R, A, and N counters are fully programmable. The C register (configuration register) allows the part to be configured to meet various applications. A patented feature allows the C register to shut off unused outputs, thereby minimizing system noise and interference.