MSM5807 PLL Frequency Synthesizer


This PLL-circuit use a 8 bit BCD binary programmable divide-by-N counter.

Down-converting of the frequency to the divider

This PLL Circuit use a Mixer and a X-Tal Oscillator to convert the output frequency f OUT to the f IN to the PLL Circuit.
The X-Tal frequency is f XTAL = f OUT - f IN
The output frequency can be changed by changing the mixing-xtal or add a new mixing-xtal to the oscillator.
1P5Programmable input 5
2P6Programmable input 6
3P7Programmable input 7
4P8Programmable input 8
5FSFunction Select - HIGH=Divided by 512 LOW=Divided by 1024
6RIReference Oscillator Input
7ROReference Oscillator Output
9PDPhase Detector Output
10LDLoop Detect - Unlocked=HIGH Locked=HIGH
11F inVCO Frequency Input
12P1Programmable input 1
13P2Programmable input 2
14P3Programmable input 3
15P4Programmable input 4
16VccPositive Supply Voltage

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