MM55108 PLL Frequency Synthesizer


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 BCD binary programmable divide-by-N counter.

1VccPositive Supply Voltage
2F inVCO Frequency Input
3RIReference Oscillator Input
4ROReference Oscillator Output
51/2RReference Oscillator Output divide by 2
6RBReference Oscillator Output (Buffered)
7PDPhase Detector Output
8LDLoop Detect - Unlocked=LOW Locked=HIGH
9P8Programmable input 8
10P7Programmable input 7
11P6Programmable input 6
12P5Programmable input 5
13P4Programmable input 4
14T/RTransmit=HIGH - Receive=LOW
15P3Programmable input 3
16P2Programmable input 2
17P1Programmable input 1

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