Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
LMK04102SQE/NOPB Texas Instruments	IC CLOCK COND W/PLL 48WQFN	220
CDCV850IDGGG4 Texas Instruments	IC PLL CLOCK DRVR 2.5V 48TSSOP	0
CDC5801ADBQR Texas Instruments	CDC5801A LOW-JITTER CLOCK MULTIP	22450
LMK03033ISQ/NOPB Texas Instruments	LMK03033 PRECISION CLOCK CONDITI	1990
CDC586PAH Texas Instruments	PLL CLOCK DRIVER	3872
SN74LV4046AD Texas Instruments	IC PLL CMOS LOGIC W/VCO HS16SOIC	520
CDC2510BPWR Texas Instruments	PLL CLOCK DRIVER	37225
CDCM61002RHBR Texas Instruments	IC CLK GEN 1:2 LOW JITTER 32QFN	1990
CDCV850DGGR Texas Instruments	PLL CLOCK DRIVER	77500
CD74HC4046AMR3413 Texas Instruments	PHASE LOCKED LOOP, CMOS	0
LMK03033CISQ/NOPB Texas Instruments	IC CLOCK CONDITIONER PREC 48WQFN	805
TRF3761-GIRHAR Texas Instruments	PLL FREQUENCY SYNTHESIZER	7500
LMK04101SQE/NOPB Texas Instruments	IC CLOCK COND W/PLL 48WQFN	0
LMX2572RHAR Texas Instruments	IC FREQ SYNTHESIZER RF 40VQFN	0
TRF3762-EIRHAT Texas Instruments	RF AND BASEBAND CIRCUIT, PQCC40	7750
CDC706PWR Texas Instruments	IC 2:6PLL SYNTH/MULT/DIV 20TSSOP	0
CDCV855IPWRG4 Texas Instruments	IC PLL CLOCK DRVR 2.5V 28TSSOP	0
CDCE18005RGZR Texas Instruments	CDCE18005 5/10 OUTPUTS CLOCK BUF	17464
LMX2581SQE/NOPB Texas Instruments	IC RF FREQ SYNTHESIZER 32WQFN	320
CDCVF2510PWR Texas Instruments	CDCVF2510 3.3-V PHASE-LOCK LOOP	24863

Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

1. Overview

Clock and timing ICs are semiconductor devices that generate, regulate, and distribute timing signals in electronic systems. Key components include Clock Generators (produce stable clock signals), Phase-Locked Loops (PLLs, synchronize signals with phase alignment), and Frequency Synthesizers (generate precise frequencies from reference signals). These devices ensure synchronization across components in modern electronics, enabling reliable operation in communication systems, computing devices, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Clock Generators	Produce fixed or programmable clock signals with low jitter	Microprocessors, FPGAs, networking equipment
PLLs	Align output signal phase with reference input, enable frequency multiplication	Wireless transceivers, data recovery circuits
Frequency Synthesizers	Generate multiple frequencies from single reference with high precision	5G base stations, satellite communication systems

3. Structure and Components

Typical clock ICs feature: 1) Crystal oscillator interface for reference signal input; 2) Internal voltage-controlled oscillator (VCO); 3) Phase detector and loop filter (PLL components); 4) Programmable dividers; 5) Output buffers. Advanced packages include QFN (4x4mm to 8x8mm) and TSSOP with 8-48 pins. Integration levels vary from single-channel devices to multi-output clock generators with integrated EEPROM.

4. Key Technical Specifications

Parameter	Typical Range	Importance
Frequency Range	1 kHz - 3.6 GHz	Determines application compatibility
Phase Noise	-150 to -120 dBc/Hz	Impacts signal integrity
Jitter (RMS)	50 fs - 1 ps	Critical for high-speed systems
Power Consumption	10-300 mA	Affects thermal design
Temperature Stability	20-100 ppm	Ensures reliability in harsh environments

5. Application Fields

Telecommunications: 5G NR base stations, optical transceivers
Computing: Server motherboards, PCIe clocks
Industrial: Precision test equipment, motor control systems
Automotive: ADAS sensors, infotainment systems
Medical: MRI imaging systems, patient monitoring devices

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	LMX2594	15-GHz wideband PLL with integrated VCO
Analog Devices	AD9548	4-channel clock generator with 0.1 ppb accuracy
STMicroelectronics	CLK2692	Programmable 2-output synthesizer for automotive
Microchip	ZL30264	High-performance network synchronizer

7. Selection Guidelines

Key selection criteria: 1) Required output frequency and voltage levels; 2) Acceptable phase noise/jitter specifications; 3) Number of required outputs; 4) Operating temperature range; 5) Power budget constraints; 6) Integration level (e.g., single-chip vs. discrete VCO solutions). For wireless applications, prioritize low phase noise. For portable devices, emphasize power efficiency.

8. Industry Trends

Future developments include: 1) Higher integration with on-chip EEPROM and multi-phase outputs; 2) Advancement to sub-10fs jitter performance; 3) Development of radiation-hardened variants for aerospace; 4) Adoption of 3D packaging for reduced EMI; 5) Increased use of AI-enabled dynamic frequency scaling. The market is projected to grow at 7.2% CAGR through 2027 driven by 5G and automotive electrification.