NXP Semiconductors Phase Locked Loops (PLL) & Frequency Synthesis Circuits 407

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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	Screening Level	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
SA7016DH	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	7.3 mA	1	BICMOS		GULL WING	3 V	3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	PLL or Frequency Synthesis Circuits	.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
TSA5526MDK-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 5V TO 13.2V SUPPLY				5.2 mm
TSA5055T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	80 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		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V					9.9 mm
UMA1016AT	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BIPOLAR		GULL WING	5 V	5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	70 Cel	-10 Cel		DUAL	R-PDSO-G16		5.5 V	1.75 mm	3.9 mm	Not Qualified	4.5 V					9.9 mm
5962-9464101QRX	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	MILITARY	20	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1		MIL-PRF-38535 Class Q	THROUGH-HOLE	5 V		IN-LINE				125 Cel	-55 Cel		DUAL	R-GDIP-T20		9 V				3 V
SA8025DK	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		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	1.7 mm	4.4 mm	Not Qualified	2.7 V	SELECTABLE 64/65/68/73 PRESCALER				6.575 mm
935268498518	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
UMA1016AT-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BIPOLAR		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	4.5 V					9.9 mm
UMA1022MDK-T	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		DUAL	R-PDSO-G20		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					6.5 mm
TSA6057T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BIPOLAR		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	4-BIT AUXILIARY INPUT COUNTER				10.3 mm
TSA5521M	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
933372900652	NXP Semiconductors	PHASE LOCKED LOOP	INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G16	1	15 V	1.75 mm	3.9 mm	Not Qualified	3 V		e4			9.9 mm
UMA1017M	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	8.5 mA	1	BICMOS		GULL WING	5 V	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
TSA5520M-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
SA7016	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
UMA1021AMDK	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		DUAL	R-PDSO-G16		5.5 V	1.5 mm	4.4 mm	Not Qualified	2.7 V					5.2 mm
TSA5521MDK-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
935044170112	NXP Semiconductors	PHASE LOCKED LOOP	AUTOMOTIVE	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE	5 V		IN-LINE			2.54 mm	125 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		5.5 V	4.7 mm	7.62 mm	Not Qualified	4.5 V		e4			21.6 mm
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
UMA1005TD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	20	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	5 mA	1	CMOS		GULL WING			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
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
SE567FE/883B	NXP Semiconductors		MILITARY	8	DIP	RECTANGULAR	NO	CERAMIC			BIPOLAR	MIL-STD-883 Class B (Modified)	THROUGH-HOLE	5 V	5	IN-LINE	DIP8,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel		DUAL	R-XDIP-T8					Not Qualified
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
933350660602	NXP Semiconductors	PHASE LOCKED LOOP	COMMERCIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	BIPOLAR		THROUGH-HOLE	5 V		IN-LINE			2.54 mm	70 Cel	0 Cel		DUAL	R-PDIP-T16			4.2 mm	7.62 mm	Not Qualified				40	245	19.025 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
TSA5511/C4	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	COMMERCIAL EXTENDED	18	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE	5 V		IN-LINE			2.54 mm	80 Cel	-10 Cel		DUAL	R-PDIP-T18		5.5 V	4.7 mm	7.62 mm	Not Qualified	4.5 V					21.6 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
567/BCA	NXP Semiconductors	PHASE LOCKED LOOP	MILITARY	14	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1			THROUGH-HOLE	5 V		IN-LINE			2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T14		9 V	5.08 mm	7.62 mm	Not Qualified	4.75 V					19.43 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

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.