28 Phase Locked Loops (PLL) & Frequency Synthesis Circuits 111

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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)	Maximum Output Frequency	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
LMX2522LQX1635	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	21 mA	1			NO LEAD	2.8 V	2.8		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	Tin/Lead (Sn85Pb15)	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.7 V		e0	40	260	5 mm
LMX2515LQ1321	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	17.8 mA	1			NO LEAD	2.8 V	3		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	TIN LEAD	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.5 V		e0		260	5 mm
LMX2502LQX1635	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	21 mA	1			NO LEAD	2.8 V	2.8		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	Tin/Lead (Sn85Pb15)	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.7 V		e0	40	260	5 mm
LMX2532LQX1065	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	21 mA	1			NO LEAD	2.8 V	2.8		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	TIN LEAD	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.7 V		e0		260	5 mm
LMX2512LQ0967/NOPB	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	21 mA	1			NO LEAD	2.8 V	2.8		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	MATTE TIN	QUAD	S-XQCC-N28	3	3.3 V	.8 mm	5 mm	Not Qualified	2.7 V		e3	30	260	5 mm
LMX2522LQ1635/NOPB	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	21 mA	1			NO LEAD	2.8 V	2.8	1649.62 GHz	CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	MATTE TIN	QUAD	S-XQCC-N28	3	3.3 V	.8 mm	5 mm	Not Qualified	2.7 V		e3	30	260	5 mm
LMX2515LQX0701	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	13.3 mA	1			NO LEAD	2.8 V	3		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	TIN LEAD	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.5 V		e0		260	5 mm
LMX2515LQX1321	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	28	VQCCN	SQUARE	YES	UNSPECIFIED	17.8 mA	1			NO LEAD	2.8 V	3		CHIP CARRIER, VERY THIN PROFILE	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-30 Cel	TIN LEAD	QUAD	S-XQCC-N28	2	3.3 V	.8 mm	5 mm	Not Qualified	2.5 V		e0		260	5 mm
LTC6945IUFD#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28	1	3.45 V	.8 mm	4 mm		3.15 V		e3	30	260	5 mm
LTC6948IUFD-2#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V		e3			5 mm
LTC6946IUFD-3#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY	.5 mA	1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC28,.16X.2,20		.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28	1	3.45 V	.8 mm	4 mm		3.15 V	ALSO OPERATES IN SUPPLY VOLTAGE 4 TO 5.25V	e3	30	260	5 mm
LTC6948IUFD-1#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V		e3			5 mm
LTC6945IUFD#PBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28	1	3.45 V	.8 mm	4 mm		3.15 V		e3	30	260	5 mm
LTC6948IUFD-4#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V		e3			5 mm
LTC6948IUFD-3#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V		e3			5 mm
LTC6946IUFD-4#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY	.5 mA	1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	LCC28,.16X.2,20		.5 mm	105 Cel	-40 Cel	MATTE TIN	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V	ALSO OPERATES IN SUPPLY VOLTAGE 4 TO 5.25V	e3			5 mm
LTC6946IUFD-1	Analog Devices	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm	105 Cel	-40 Cel	TIN LEAD	QUAD	R-PQCC-N28		3.45 V	.8 mm	4 mm		3.15 V		e0			5 mm
LTC6946IUFD-2#TRPBF	Analog Devices	PLL FREQUENCY SYNTHESIZER		28	HVQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		NO LEAD	3.3 V			CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE			.5 mm			MATTE TIN	QUAD	R-PQCC-N28	1	3.45 V	.8 mm	4 mm		3.15 V	ALSO OPERATES IN SUPPLY VOLTAGE 4 TO 5.25V	e3	30	260	5 mm
TDA7427AD1	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING	5 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G28		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	ALSO REQUIRES A 10V NOMINAL SUPPLY	e4			17.9 mm
TDA7327D1	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1			GULL WING	5 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDSO-G28		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	IT ALSO REQUIRES 9V TO OPERATE	e0			17.9 mm
STW81100ATR	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
STW81100AT	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
TDA7427AAD1	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1			GULL WING	5 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G28		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V		e4			17.9 mm
TDA7427ADTR	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING	5 V			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		5.5 V	1.2 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES A 10V NOMINAL SUPPLY				9.7 mm
TDA7427AD	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING	5 V			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDSO-G28	3	5.5 V	1.2 mm	4.4 mm	Not Qualified	4.5 V	ALSO REQUIRES A 10V NOMINAL SUPPLY	e4			9.7 mm
A888ATR	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
TDA7427AD1TR	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING	5 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDSO-G28		5.5 V	2.65 mm	7.5 mm	Not Qualified	4.5 V	ALSO REQUIRES A 10V NOMINAL SUPPLY	e0			17.9 mm
A888AT	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
TDA7427AAD	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1			GULL WING	5 V			SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G28		5.5 V	1.2 mm	4.4 mm	Not Qualified	4.5 V		e0			9.7 mm
STW81100ATR-1	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
STW81100AT-1	STMicroelectronics		INDUSTRIAL	28	QCCN	SQUARE	YES	PLASTIC/EPOXY	100 mA		BICMOS		NO LEAD	3.3 V	3.3		CHIP CARRIER	LCC28,.2SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N28					Not Qualified
TDD1742T-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	1.5 mA	1	CMOS		GULL WING	7.4 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		10 V	2.65 mm	7.5 mm	Not Qualified	7 V					17.9 mm
TDD1742TD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	1.5 mA	1	CMOS		GULL WING	7.4 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		10 V	2.65 mm	7.5 mm	Not Qualified	7 V					17.9 mm
TDD1742T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	1.5 mA	1	CMOS		GULL WING	7.4 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		10 V	2.65 mm	7.5 mm	Not Qualified	7 V					17.9 mm
TDD1742TD-T	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY	1.5 mA	1	CMOS		GULL WING	7.4 V			SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		10 V	2.65 mm	7.5 mm	Not Qualified	7 V					17.9 mm
5962-9231301MXA	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1		MIL-STD-883	THROUGH-HOLE	5 V			IN-LINE				125 Cel	-55 Cel		DUAL	R-GDIP-T28		9 V				3 V
5962-9231301MXX	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1		MIL-STD-883	THROUGH-HOLE	5 V			IN-LINE				125 Cel	-55 Cel		DUAL	R-GDIP-T28		9 V				3 V
933520180112	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	CMOS		THROUGH-HOLE	10 V			IN-LINE			2.54 mm	85 Cel	-40 Cel		DUAL	R-GDIP-T28		10.5 V	5.84 mm	15.24 mm	Not Qualified	9.5 V			NOT SPECIFIED	NOT SPECIFIED
HEC4750VD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1	CMOS		THROUGH-HOLE				IN-LINE				125 Cel	-55 Cel		DUAL	R-CDIP-T28		15 V			Not Qualified	3 V
HEC4750VDF	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.75 mA	1	CMOS		THROUGH-HOLE	10 V			IN-LINE			2.54 mm	125 Cel	-55 Cel	TIN/NICKEL PALLADIUM GOLD	DUAL	R-GDIP-T28		10.5 V	5.72 mm	15.24 mm	Not Qualified	9.5 V		e3/e4			37.1475 mm
HEF4750VD,112	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.75 mA	1	CMOS		THROUGH-HOLE	10 V	10		IN-LINE	DIP28,.6	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	TIN/NICKEL PALLADIUM GOLD	DUAL	R-GDIP-T28		10.5 V	5.84 mm	15.24 mm	Not Qualified	9.5 V		e3/e4
HEF4750VDF	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	CMOS		THROUGH-HOLE	10 V			IN-LINE			2.54 mm	85 Cel	-40 Cel		DUAL	R-GDIP-T28		10.5 V	5.84 mm	15.24 mm	Not Qualified	9.5 V
HEF4750VD	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.75 mA	1	CMOS		THROUGH-HOLE	10 V	10		IN-LINE	DIP28,.6	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	TIN/NICKEL PALLADIUM GOLD	DUAL	R-GDIP-T28		10.5 V	5.84 mm	15.24 mm	Not Qualified	9.5 V		e3/e4
HEF4750VF	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	CMOS		THROUGH-HOLE	10 V			IN-LINE			2.54 mm	85 Cel	-40 Cel	TIN/NICKEL PALLADIUM GOLD	DUAL	R-GDIP-T28		10.5 V	5.84 mm	15.24 mm	Not Qualified	9.5 V		e3/e4
MC145151DW2	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	CMOS		GULL WING				SMALL OUTLINE			1.27 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G28		9 V	2.65 mm	7.5 mm		3 V			40	260	17.925 mm
PMB2251V1.3	Infineon Technologies		OTHER	28	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY					GULL WING		3/5		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP28,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-30 Cel		DUAL	R-PDSO-G28					Not Qualified
IMI145152028XB	Infineon Technologies		INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY			CMOS		GULL WING		3/9		SMALL OUTLINE	SOP28,.4	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G28					Not Qualified			e0
IMI145152028ST	Infineon Technologies		MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC			CMOS		THROUGH-HOLE		3/9		IN-LINE	DIP28,.6	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-XDIP-T28					Not Qualified			e0

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.