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TC9109 and MB8733 PLL Frequency Synthesizer

Overview

This 27 MHz band, PLL frequency synthesizer LSI chip is designed specifically for CB transceivers. The integrated circuit`s incorporates PLL circuitry and a controller for CB applications on a single CMOS chip.
This PLL-circuit use a 8 bit ROM programmable divide-by-N counter. The ROM-table is programmed from factory to 40 channels.
PinNameDescription
1VccPositive Supply Voltage
2RIReferency Oscillator Input
3CL
4LDLoop Detect - Unlocked=LOW Locked=HIGH
5PDPhase Detector Output
6AIAmp. Input
7AOAmp. Output
8T/RTransmit=HIGH Receive=LOW
9F inVCO Frequency Input
10P0Programmable input 0
11P1Programmable input 1
12P2Programmable input 2
13P3Programmable input 3
14P4Programmable input 4
15P5Programmable input 5
16P6Programmable input 6
17P7Programmable input 7
18GNDGround

Explanation of pin function terms


Programming Chart for TC9106

ChannelRX
Divided by
TX
Divided by
132545393
232565395
..........
4033425481
NOTES:
1. Spesial divided by 2 circuit in TX mode change Referency Divider output to 2.5kHz steps. The 2139 count upshifts produces a 13MHz VCO witch is then doubled for the direct on-channel TX-frequency.

Example of VCO Determination, Channel 1:
3254 x 5kHz = 16.270MHz (RX-Mode)
5393 x 2.5kHz = 134825MHz (TX-Mode)
(13.4825MHz x 2 = 26.965MHz)


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