MC145201 Datasheet | Motorola Semiconductor

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145200/D 2.0 GHz PLL Frequency Synthesizers MC145200 MC145201 Include On- Board 64/65 Prescalers The MC145200 and MC145201 are single- package synthesizers with serial interfaces capable of direct usage up to 2.0 GHz. A special architecture makes these PLLs very easy to program because a byte- oriented format is utilized. Due to the patented Bit Grabber™ registers, no address/steering bits are required for random access of the three registers. Thus, tuning can be acplished via a 3- byte serial transfer to the 24- bit A register. The interface is both SPI and MICROWIRE™ patible. Each device Features a single- ended current source/sink phase detector output and a double- ended phase detector output. Both phase detectors have linear transfer functions (no dead zones). The maximum current of the single- ended 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 MC145200 Features logic- level converters and high- voltage phase/ frequency detectors; the detector supply may range up to 9.5 V. The MC145201 has lower- voltage phase/frequency detectors optimized for single- supply systems of 5 V ± 10%. Each part includes a differential RF input which may be operated in a single- ended mode. Also featured are on- board 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 parts 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. In order to have consistent lock times and prevent erroneous data from being loaded into the counters, on- board circuitry synchronizes the update of the A register if the A or N counters are loading. Similarly, an update of the R register is synchronized if the R counter is...