Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
CY22389ZXC-26 IR (Infineon Technologies)	IC CLOCK GENERATOR	3972
CY2309CZXI-1H IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 2309 SER	20255
CY7B9910-7SXC IR (Infineon Technologies)	PLL CLOCK DRIVER	1072
CY7B995AXC IR (Infineon Technologies)	PLL CLOCK DRIVER	12898
CY7B9911V-5JC IR (Infineon Technologies)	LOW SKEW CLOCK DRIVER	4644
CY23FP12OXI IR (Infineon Technologies)	PLL CLOCK DRIVER	868
CY26580KOI-2 IR (Infineon Technologies)	CLOCK GENERATOR, 133.33MHZ, CMOS	5001
CY22395FXCT IR (Infineon Technologies)	CLOCK GENERATOR, 200MHZ PDSO16	2300
CY220501KFZXI IR (Infineon Technologies)	GENERAL-PURPOSE FLASH PROGRAMMAB	804
CY22M1LCALGXC-00 IR (Infineon Technologies)	CLOCK GENERATOR, 80MHZ, CMOS	22676
CY25100ZXI08T IR (Infineon Technologies)	CLOCKS	12500
CY22381SXI-146 IR (Infineon Technologies)	IC CLOCK GENERATOR	4453
CY29775AXI IR (Infineon Technologies)	PLL BASED CLOCK DRIVER	10566
CY2544FI IR (Infineon Technologies)	CLOCK GENERATOR, 166MHZ, CMOS	2134
CY2292SXL-1J4 IR (Infineon Technologies)	THREE-PLL GENERAL-PURPOSEEPROM P	11889
CY23S09SXC-1H IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 23S SERI	12755
CY25200K-ZXC009B IR (Infineon Technologies)	CLOCK GENERATOR	5091
CY7B994V-2BBC IR (Infineon Technologies)	PLL CLOCK DRIVER	1883
CY7B994V-2BBXI IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 7B SERIE	483
CY24130ZXC-1 IR (Infineon Technologies)	CLOCK GENERATOR	2400

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.