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uPD2814, uPD2816, HD42853, KM5624 PLL Integrated Circuits

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 6 bit ROM programmable divide-by-N counter. The ROM-table is programmed from factory to 40 channels CEPT.


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.
PinNameDecription
1P1Binary programable input 1
2P2Binary programable input 2
3P3Binary programable input 3
4P4Binary programable input 4
5P5Binary programable input 5
6P6Binary programable input 6
7TDivided by 2 input
8QDivided by 2 output
9T/RTransmit=LOW Receive=HIGH
101/2RReferency frequency divided by 2
11VDDPositive Power Supply (+5Volt)
12ROReferency oscillator Output (X-tal)
13RIReferency oscillator Input (X-tal)
14RBReference Oscillator Output (Buffered)
15LDLoop Detector output
16VDDPositive Power Supply (+5Volt)
17PDPhase Detector output
18AILoop filter Amplifier Input
19AOLoop filter Amplifier Output
20FSFunction Select - HIGH=10kHz step LOW=5kHz step
21GNDGround
22FINVCO Oscillator Input

ROM Code Table

ChannelP6P5P4P3P2P1
01000001
02000010
03000011
04000100
05000101
06000110
07000111
08001000
09001001
10010000
11010001
12010010
13010011
14010100
15010101
16010110
17010111
18011000
19011001
20100000
21100001
22100010
23100011
24100100
25100101
26100110
27100111
28101000
29101001
30110000
31110001
32110010
33110011
34110100
35110101
36110110
37110111
38111000
39111001
40000000

Explanation of pin function terms



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