Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
CY24271ZXC IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 24271 SE	5819
CY22050KZXI-133 IR (Infineon Technologies)	IC CLOCK GENERATOR	7203
CY7B9910-5SXC IR (Infineon Technologies)	PLL CLOCK DRIVER	742
CY25403FSXC IR (Infineon Technologies)	CLOCK GENERATOR, 166MHZ PDSO8	2383
CY23S08SXI-2 IR (Infineon Technologies)	PLL CLOCK DRIVER	4983
CY22388ZXC-28 IR (Infineon Technologies)	CLOCKS	6791
CY23FS04ZXI IR (Infineon Technologies)	CLOCK GENERATOR	3201
CY7B994V-5BBXC IR (Infineon Technologies)	PLL CLOCK DRIVER	187
CY22381SXI-292 IR (Infineon Technologies)	TRIPLE PLL CLOCK MULTIPLIER	0
CY22U1SCALGXC-00 IR (Infineon Technologies)	CLOCK GENERATOR, 200MHZ, CMOS	19639
CY23EP05SXC-1T IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 23EP SER	2300
CY29422FLXI IR (Infineon Technologies)	HIGH-PERFORMANCE PROGRAMMABLE OI	115
CY26121ZC-21 IR (Infineon Technologies)	CLOCK GENERATOR	3026
CY2077FZXI IR (Infineon Technologies)	HIGH-ACCURACY EPROM PROGRAMMABLE	7786
CY241V8ASXC-16 IR (Infineon Technologies)	CLOCKS	26176
CY7B9911V-5JXC IR (Infineon Technologies)	LOW SKEW CLOCK DRIVER, 7B SERIES	215
CY2302SC-1 IR (Infineon Technologies)	PLL CLOCK DRIVER	7478
CY2077FSXC IR (Infineon Technologies)	CLOCK GENERATOR	11269
CY23S08SXC-1 IR (Infineon Technologies)	PLL CLOCK DRIVER	4385
CY25823ZXC IR (Infineon Technologies)	CLOCK GENERATOR, 100MHZ PDSO16	0

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.