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MB8719 MB8734 RCI8719 PLL Synthesizer

Overview

This PLL-circuit use a 6 bit (MB8734 and RCI8719) or 7 bit (MB8719) 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.
PinNameDescription
1OutInverter out
2InInverter in
3OutInverter out
4InInverter in
5CPCharge Pump
6LDLoop Detect
7OSC inOscillator input
8OSC outOscillator output
9VDDPositive Power Supply
10P6Programmable inputs (Binary) (Only MB8719)
11P5Programmable inputs (Binary)
12P4Programmable inputs (Binary)
13P3Programmable inputs (Binary)
14P2Programmable inputs (Binary)
15P1Programmable inputs (Binary)
16P0Programmable inputs (Binary)
17F inFrequency input
18VSSGND Ground

Explanation of pin function terms


TRUTH TABLE FOR RCI8719 AND MB8734
P5P4P3P2P1P0Divide by N
0000000 + 128
0000011 + 128
0000102 + 128
0000113 + 128
0001004 + 128
-------
-------
11111164 + 128

TRUTH TABLE FOR MB8719
P6P5P4P3P2P1P0Divide by N
00000000 + 128
00000011 + 128
00000102 + 128
00000113 + 128
00001004 + 128
--------
--------
011111164 + 128
10000000 + 64
10000011 + 64
10000102 + 64
10000113 + 64
10001004 + 64
1-------
1-------
111111164 + 64

Uniden AM/FM/SSB Chassis



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