Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
LMK03806BISQE/NOPB Texas Instruments	IC CLOCK PROG GENERATOR 64WQFN	35510000
CDCV857DGGR Texas Instruments	PLL CLOCK DRIVER	32045
CDC9843DW Texas Instruments	CLOCK GENERATOR	1632
LMX2485SQ/NOPB Texas Instruments	IC PLL FREQ SYNTH 3GHZ 24WQFN	8146
CDCM7005ZVAT Texas Instruments	IC CLK SYNC/JITTER CLEANER 64BGA	0
CDCE949PWR Texas Instruments	IC 4-PLL VCXO LVCMOS 24-TSSOP	1037
TLC2943IDB Texas Instruments	PHASE LOCKED LOOP, CMOS, PDSO38	1030
74HCT4046AM Texas Instruments	IC PLL W/VCO 16-SOIC	1280
LMK04832W/EM Texas Instruments	SPACE GRADE ULTRA LOW-NOISE JESD	0
TLC320AC03CFNR Texas Instruments	5 VOLT AIC	7948
CDCE6214TWRGERQ1 Texas Instruments	CDCE6214 AUTOMOTIVE GRADE2	2541
TLC2942IDBR Texas Instruments	PHASE LOCKED LOOP, CMOS, PDSO38	16000
LMK5C33216RGCT Texas Instruments	ULTRA-LOW JITTER CLOCK SYNCHRONI	0
74HCT7046AM96 Texas Instruments	IC PLL W/VCO/LOCK DETECT 16SOIC	2500
PSN0209033PZP-1 Texas Instruments	TCON MINI-LVDS GREEN COMPOUND	0
TRF6151CRGZR Texas Instruments	TI-WCBU RITA 2.4	2500
HPA00394ZQLR Texas Instruments	IC PLL CLOCK DVR 1.8V 52BGA	10000
SN0209033PZP-1 Texas Instruments	TCON MINI-LVDS	2072
HPA00015PWR Texas Instruments	IC PLL CLOCK DRIVER 3.3V 24TSSOP	0
CDCE6214TWRGETQ1 Texas Instruments	CDCE6214 AUTOMOTIVE GRADE2	66

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.