MB8719

RETOUR SOMMAIRE DES COMPOSANTS

RETOUR

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MB8719 MB8734 RCI8719 PLL Synthesizer

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Overview

This PLL-circuit use a 6 bit (MB8734 and RCI8719) or 7 bit (MB8719) BCD binary programmable divide-by-N counter.

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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. |

Pin | Name | Description
--- | --- | ---
1 | Out | Inverter out
2 | In | Inverter in
3 | Out | Inverter out
4 | In | Inverter in
5 | CP | Charge Pump
6 | LD | Loop Detect
7 | OSC in | Oscillator input
8 | OSC out | Oscillator output
9 | VDD | Positive Power Supply
10 | P6 | Programmable inputs (Binary) (Only MB8719)
11 | P5 | Programmable inputs (Binary)
12 | P4 | Programmable inputs (Binary)
13 | P3 | Programmable inputs (Binary)
14 | P2 | Programmable inputs (Binary)
15 | P1 | Programmable inputs (Binary)
16 | P0 | Programmable inputs (Binary)
17 | F in | Frequency input
18 | VSS | GND Ground

TRUTH TABLE

P6 | P5 | P4 | P3 | P2 | P1 | P0 | Divide by N
--- | --- | --- | --- | --- | --- | --- | ---
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
0 | 0 | 0 | 0 | 0 | 0 | 1 | 1
0 | 0 | 0 | 0 | 0 | 1 | 0 | 2
0 | 0 | 0 | 0 | 0 | 1 | 1 | 3
0 | 0 | 0 | 0 | 1 | 0 | 0 | 4
- | - | - | - | - | - | - | -
- | - | - | - | - | - | - | -
1 | 1 | 1 | 1 | 1 | 1 | 1 | 128