SOP Phase Locked Loops (PLL) & Frequency Synthesis Circuits 383

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Part	Manufacturer	Other IC type	Temperature Grade	No. of Terminals	Package Code	Package Shape	Surface Mount	Package Body Material	Maximum Supply Current (Isup)	No. of Functions	Technology	Terminal Form	Nominal Supply Voltage (Vsup)	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	JESD-30 Code	Moisture Sensitivity Level (MSL)	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width (mm)	Qualification	Minimum Supply Voltage (Vsup)	Additional Features	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length
TSA5526ATD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 5V TO 13.2V SUPPLY				9.9 mm
TSA5526AT-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				9.9 mm
TSA5512T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V					9.9 mm
TSA5060AT/C1,518	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V			40	260	9.9 mm
TSA5527T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				9.9 mm
UMA1014TD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	13.5 mA	1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	5-BIT AUXILIARY INPUT COUNTER; SELECTABLE 31/32 PRESCALER				9.9 mm
TSA6057TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	28 mA	1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE				85 Cel	-30 Cel		DUAL	R-PDSO-G16		5.5 V			Not Qualified	4.5 V	IT ALSO REQUIRES 8.5V TO OPERATE
NE564D	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	60 mA	1	BIPOLAR	GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	70 Cel	0 Cel		DUAL	R-PDSO-G16	1		1.93 mm	3.9 mm	Not Qualified						9.9 mm
SA567D	NXP Semiconductors	PHASE LOCKED LOOP		8	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING			SMALL OUTLINE			1.27 mm				DUAL	R-PDSO-G8			1.75 mm	3.9 mm	Not Qualified						4.9 mm
TSA5526TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 5V TO 13.2V SUPPLY				9.9 mm
TSA5511T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ADDITIONAL DIVIDE BY 8 PRESCALER				9.9 mm
SA568AD-T	NXP Semiconductors	PHASE LOCKED LOOP	INDUSTRIAL	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V	5	SMALL OUTLINE	SOP20,.4	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					12.8 mm
TSA5512AT	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					12.8 mm
TSA5514AT	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					12.8 mm
TSA5060AT	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	45 mA	1		GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V			40	260	9.9 mm
TSA6060T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					10.3 mm
SA568AD	NXP Semiconductors	PHASE LOCKED LOOP	INDUSTRIAL	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V	5	SMALL OUTLINE	SOP20,.4	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					12.8 mm
TSA6060T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					10.3 mm
TDA8735TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G16		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					10.3 mm
TSA5511T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ADDITIONAL DIVIDE BY 8 PRESCALER				9.9 mm
TSA5511TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G16			1.75 mm	3.9 mm	Not Qualified						9.9 mm
UMA1014TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	13.5 mA	1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	5-BIT AUXILIARY INPUT COUNTER; SELECTABLE 31/32 PRESCALER				9.9 mm
TSA5511AT-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	ADDITIONAL DIVIDE BY 8 PRESCALER				12.8 mm
NE568D	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	70 Cel	0 Cel		DUAL	R-PDSO-G20		5.25 V	2.65 mm	7.5 mm	Not Qualified	4.75 V					12.8 mm
TSA5526T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				9.9 mm
TSA5059AT	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	45 mA	1	BIPOLAR	GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.25 V	1.75 mm	3.9 mm	Not Qualified	4.75 V				260	9.9 mm
TSA5520TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				9.9 mm
TSA5055TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	70 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.75 V					9.9 mm
UMF1009T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	2.7 V					9.9 mm
TDA8735T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-30 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	ADDL SPLY OF 4.5V TO 12V REQD, SELECTABLE 3/4 PRESCALER; 2-BIT SWALLOW COUNTER	e4			10.3 mm
933809550653	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE			1.27 mm	125 Cel	-40 Cel		DUAL	R-PDSO-G16		6 V	1.75 mm	3.9 mm		3 V	ALSO OPERATES WITH 2V TO 6V IF VCO IS NOT USED		NOT SPECIFIED	NOT SPECIFIED	9.9 mm
TSA5055T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V					9.9 mm
TSA5514T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	80 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V					9.9 mm
TSA5526T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE			1.27 mm	85 Cel	-20 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY	e4			9.9 mm
TSA5512T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	50 mA	1	BIPOLAR	GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	80 Cel	-10 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V		e4			9.9 mm
933656140602	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE			1.27 mm	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16			1.93 mm	3.9 mm	Not Qualified			e4			9.9 mm
933656140623	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE			1.27 mm	70 Cel	0 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16			1.93 mm	3.9 mm	Not Qualified			e4			9.9 mm
NE568AD	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V	5	SMALL OUTLINE	SOP20,.4	PLL or Frequency Synthesis Circuits	1.27 mm	70 Cel	0 Cel		DUAL	R-PDSO-G20		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V					12.8 mm
MC12179D	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	8	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	5.6 mA	1	BIPOLAR	GULL WING	5 V		SMALL OUTLINE	SOP8,.25		1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G8		5.5 V	1.75 mm	3.9 mm		4.5 V					4.9 mm
MC12210D	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	16 mA	1	BIPOLAR	GULL WING	3 V		SMALL OUTLINE	SOP16,.23		1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm		2.7 V					9.9 mm
MC12181D	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	5.5 mA	1	BIPOLAR	GULL WING	3 V		SMALL OUTLINE	SOP16,.25		1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm		2.7 V					9.9 mm
74HC4046AD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V	2/6	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	R-PDSO-G16	1	6 V	1.75 mm	3.81 mm	Not Qualified	3 V	WITH THREE PHASE COMPARATORS	e4	30	260	9.9 mm
MC145220F	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	30 mA	1		GULL WING	3.5 V		SMALL OUTLINE	SOP20,.3		1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	2.05 mm	5.275 mm		2.7 V					12.575 mm
74HC4046ATD-T	NXP Semiconductors	PHASE LOCKED LOOP	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE			1.27 mm	125 Cel	-40 Cel		DUAL	R-PDSO-G16		6 V	1.75 mm	3.9 mm	Not Qualified	2 V					9.9 mm
74HCT9046ADB	NXP Semiconductors	PHASE LOCKED LOOP	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE				125 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V			Not Qualified	4.5 V
74HCT7046AD	NXP Semiconductors	PHASE LOCKED LOOP	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-40 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	R-PDSO-G16	1	5.5 V			Not Qualified	4.5 V	WITH TWO PHASE COMPARATORS	e4	30	260
74HC7046AT	NXP Semiconductors	PHASE LOCKED LOOP	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE			1.27 mm	125 Cel	-40 Cel		DUAL	R-PDSO-G16		6 V	1.75 mm	3.9 mm	Not Qualified	2 V					9.9 mm
74HC4046AD/S71,118	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	AUTOMOTIVE	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS	GULL WING	5 V		SMALL OUTLINE			1.27 mm	125 Cel	-40 Cel		DUAL	R-PDSO-G16		6 V	1.75 mm	3.81 mm		3 V	WITH THREE PHASE COMPARATORS				9.9 mm

Phase Locked Loops (PLL) & Frequency Synthesis Circuits

Phase Locked Loops (PLL) and Frequency Synthesis Circuits are electronic circuits used to generate and control stable and precise frequencies for use in various applications, such as communication systems, signal processing, and instrumentation.

A PLL is a feedback system that compares the phase of an input signal to the phase of a reference signal and adjusts the output frequency to match the reference frequency. The basic components of a PLL include a phase detector, a low-pass filter, a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares the phase of the input and reference signals and generates an error signal that is filtered and used to adjust the frequency of the VCO. The output of the VCO is divided by a frequency divider to generate the output frequency. PLLs are commonly used for frequency synthesis, clock recovery, and phase modulation/demodulation.

Frequency synthesis circuits are electronic circuits used to generate precise and stable frequencies by combining multiple signals with different frequencies. These circuits use various techniques, such as direct digital synthesis (DDS), fractional-N synthesis, and frequency mixing to generate frequencies. DDS is a technique that uses a digital signal generator to generate a waveform with a specific frequency, phase, and amplitude. Fractional-N synthesis is a technique that uses a PLL to generate a frequency that is a fraction of the reference frequency. Frequency mixing is a technique that combines two signals with different frequencies to generate a signal with a frequency equal to the difference between the two frequencies.

PLLs and frequency synthesis circuits are critical components in many electronic systems that require precise and stable frequencies. These circuits are used in communication systems, signal processing, instrumentation, and other applications where accurate frequency generation and control is required.