The MC145106 is a phase locked loop (PLL) frequency synthesizer constructed in CMOS on a single monolithic structure. This synthesizer finds applications in such areas as CB and FM transceivers. The device contains an oscillator/amplifier, a 1024 or 2048 divider chain for the oscillator signal, a programmable divider chain for the input signal, and a phase detector.
The MC145106 has circuitry for a 10.24 MHz oscillator or may operate with an external signal. The circuit provides a 5.12 MHz output signal, which can be used for frequency tripling. A 512 programmable divider divides the input signal frequency for channel selection. The inputs to the programmable divider are standard ground to supply binary signals. Pull down resistors on these inputs normally set these inputs to ground enabling these programmable inputs to be controlled from a mechanical switch or electronic circuitry.
MC145106 PLL IC
Pin Name Description 1 VDD Positive Power Supply 2 F in Frequency input to programmable divider - Max. 3MHz 3 OSC in Oscillator input 4 OSC out Oscillator output 5 F out Reference OSC frequency divide by 2 output 6 FS Reference Oscillator Frequency Division Select. 1=10 kHz, 0=5 kHz 7 D out Detector output (for control of external VCO) 8 LD Lock Detector 9 P8 Programmable inputs (Binary) 10 P7 Programmable inputs (Binary) 11 P6 Programmable inputs (Binary) 12 P5 Programmable inputs (Binary) 13 P4 Programmable inputs (Binary) 14 P3 Programmable inputs (Binary) 15 P2 Programmable inputs (Binary) 16 P1 Programmable inputs (Binary) 17 P0 Programmable inputs (Binary) 18 VSS Ground
