MC145104 SM5104 MM55104 MN6040A 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.
1VccPositive Supply Voltage
2F inVCO Frequency Input
3RIReferency Oscillator Input
4ROReferency Oscillator Output
5FSHIGH=10kHz - LOW=5kHz
6PDPhase Detector Output
7LDLoop Detect - Unlocked=LOW Locked=HIGH
8P7Programmable input 7
9P6Programmable input 6
10P5Programmable input 5
11P4Programmable input 4
12P3Programmable input 3
13P2Programmable input 2
14P1Programmable input 1
15P1Programmable input 0

Explanation of pin function terms

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