The MC1451701 is a singlechip synthesizer capable of direct usage in the MF, HF, and VHF bands. A special architecture makes this PLL the easiest to program in the industry. Either a bit or byteoriented format may be used. Due to the patented BitGrabberTM registers, no address/steering bits are required for random access of the three registers. Thus, tuning can be accomplished via a 2byte serial transfer to the 16bit N register. The device features fully programmable R and N counters, an amplifier at the fin pin, onchip support of an external crystal, a programmable reference output, and both single and doubleended phase detectors with linear transfer functions (no dead zones). A configuration (C) 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 noise and interference. In order to reduce lock times and prevent erroneous data from being loaded into the counters, a patented jamload feature is included. Whenever a new divide ratio is loaded into the N register, both the N and R counters are jamloaded with their respective values and begin counting down together. The phase detectors are also initialized during the jam load. Operating Voltage Range: 2.5 to 5.5 V Maximum Operating Frequency: