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.

Pin	Name	Description
1	Vcc	Positive Supply Voltage
2	RI	Referency Oscillator Input
3	CL
4	LD	Loop Detect - Unlocked=LOW Locked=HIGH
5	PD	Phase Detector Output
6	AI	Amp. Input
7	AO	Amp. Output
8	T/R	Transmit=HIGH Receive=LOW
9	F in	VCO Frequency Input
10	P0	Programmable input 0
11	P1	Programmable input 1
12	P2	Programmable input 2
13	P3	Programmable input 3
14	P4	Programmable input 4
15	P5	Programmable input 5
16	P6	Programmable input 6
17	P7	Programmable input 7
18	GND	Ground

Programming Chart for TC9109

Channel	RX Divided by	TX Divided by
1	3254	5393
2	3256	5395
..	....	....
40	3342	5481

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)

This counter shows the number of hits since the 29th January 2000

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