YES Phase Locked Loops (PLL) & Frequency Synthesis Circuits 2,400+

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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
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
UMA1015M/C2-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.6 V					6.5 mm
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
TSA5059TS/C2	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.25 V	1.5 mm	4.4 mm	Not Qualified	4.75 V					5.2 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
SA8015DK	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.5 mm
UMA1005T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	5 mA	1	CMOS	GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	70 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.9 V					6.5 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
UMA1017MDK-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	.025 mA	1	BICMOS	GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.575 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
SA8016DH-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16		5.5 V	1.1 mm	4.4 mm	Not Qualified	2.7 V					5 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
UMA1022M/C1	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-30 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V		e4			6.5 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
SA7026DH-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20		5.5 V	1.1 mm	4.4 mm	Not Qualified	2.7 V					6.5 mm
TSA5527AM-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				5.2 mm
UMA1015MDK	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	70 Cel	-20 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.575 mm
UMA1022M	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	2.1 mA	1	BICMOS	GULL WING	3 V	3/5	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SSOP20,.25	PLL or Frequency Synthesis Circuits	.65 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.5 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
SA8016	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.1 mm	4.4 mm	Not Qualified	2.7 V		e4			5 mm
SA8027DH,518	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G20	1	3.6 V	1.1 mm	4.4 mm	Not Qualified	2.7 V		e4			6.5 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
935260845112	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-30 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V		e4			5.2 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
UMA1021MDK-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING			SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.5 mm
UMA1021AM	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	9.5 mA	1	BICMOS	GULL WING	3 V	3/5	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SSOP16,.25	PLL or Frequency Synthesis Circuits	.65 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					5.2 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
SA8025ADK	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	3 V	3/5	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SSOP20,.25	PLL or Frequency Synthesis Circuits	.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20	1	5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.5 mm
UMA1018MDK-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	.025 mA	1	BICMOS	GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	70 Cel	-20 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.575 mm
TSA5527M	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY	e4			5.2 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
SA8016WC	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	24	VQCCN	SQUARE	YES	PLASTIC/EPOXY	9.5 mA	1	BICMOS	NO LEAD	3 V	3/5	CHIP CARRIER, VERY THIN PROFILE	LCC24,.19SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N24		5.5 V	.8 mm	4 mm	Not Qualified	2.7 V					4 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
UMA1015M/C2	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS	GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.6 V					6.5 mm
935268498557	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	24	HBCC	SQUARE	YES	PLASTIC/EPOXY		1	BICMOS	BUTT	3 V		CHIP CARRIER, HEAT SINK/SLUG			.5 mm	85 Cel	-40 Cel		BOTTOM	S-PBCC-B24		3.6 V	.8 mm	4 mm	Not Qualified	2.7 V			NOT SPECIFIED	NOT SPECIFIED	4 mm
TSA5526M-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				5.2 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
TSA5520M	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel		DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY				5.2 mm
TSA5526M	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1		GULL WING	5 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-20 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES 4.5V TO 13.5V SUPPLY	e4			5.2 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

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.