MC145159-1 Datasheet (Motorola) - Serial-Input PLL Frequency Synthesizer

MC145159-1, Serial-Input PLL Frequency Synthesizer

INPUT PINS OSCin, OSCout Oscillator Input and Oscillator Output (PDIP, SOG * Pins 2, 3; SSOP * Pins 7, 8) These pins form an on *chip reference oscillator when connected to terminals of an external parallel *resonant crystal.

Frequency *setting capacitors of app

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Serial-Input PLL Frequency Synthesizer with Analog Phase Detector Interfaces with Dual Modulus Prescalers The MC145159 1 has a programmable 14 bit reference counter, as well as fully programmable divide by N/divide by A counters.

The counters are programmed serially through a common data input and latched into the appropriate counter latch, according to the last data bit (control bit) entered.

When comb

MC145159-1 Features

* ch. The divide

* by

* A/divide

* by

* N counter latch is loaded, regardless of the contents of the control register, when ENB goes high. The data entry format is shown in Figure 1. ENB Transparent Latch Enable (PDIP, SOG

* Pin 13, SSOP

* Pin 18) A logic high o