MC145170-1

www.DataSheet4U.com MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145170–1/D MC145170-1 Advance Information PLL Frequency Synthesizer with Serial Interface CMOS The new MC145170–1 is pin–for–pin compatible with the MC145170. A comparison of the two parts is shown in the table below. The MC145170–1 is recommended for new designs. The MC145170–1 is a single–chip 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 byte–oriented format may be used. Due to the patented BitGrabber™ registers, no address/steering bits are required for random access of the three registers. Thus, tuning can be accomplished via a 2–byte serial transfer to the 16–bit N register. The device features fully programmable R and N counters, an amplifier at the fin pin, on–chip support of an external crystal, a programmable reference output, and both single– and double–ended 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 jam–load feature is included. Whenever a new divide ratio is loaded into the N register, both the N and R counters are jam–loaded with their re...