Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
CY24902ZXCT IR (Infineon Technologies)	IC CLOCK GEN FIELD PRG 8-TSSOP	12500
CY22388ZXC-25 IR (Infineon Technologies)	CLOCK GENERATOR, 74.25MHZ, CMOS,	10899
CY23FS08OXI-05 IR (Infineon Technologies)	IC CLK ZDB 8OUT 200MHZ 28SSOP	87
CY2305CSXC-1T IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 2305 SER	5000
CY22391LTXC IR (Infineon Technologies)	CLOCK GENERATOR, PQCC32	94
CY22381SXI-190 IR (Infineon Technologies)	IC CLOCK GENERATOR	2681
CY26114KZCT IR (Infineon Technologies)	CLOCK GENERATOR	2500
CY22150FZXIT IR (Infineon Technologies)	CLOCK GENERATOR, 166.6MHZ PDSO16	5000
CY22180FSXC IR (Infineon Technologies)	PROCESSOR CLOCK GENERATOR	14715
CY25404ZXI011 IR (Infineon Technologies)	QUAD PLL PROGRAMMABLE CLOCK GENE	3368
CY2XP22ZXI IR (Infineon Technologies)	CLOCK GENERATOR, 125MHZ PDSO8	8528
CY241V8ASXC-14 IR (Infineon Technologies)	IC CLOCK GEN MPEG W/VCXO 8SOIC	4850
CY7B9910-2SXCT IR (Infineon Technologies)	PLL CLOCK DRIVER	132
CY25100SXCFT IR (Infineon Technologies)	CLOCK GENERATOR, 200MHZ PDSO8	10000
CY23S08SXC-2 IR (Infineon Technologies)	PLL CLOCK DRIVER	4731
CY2308ZXC-1HT IR (Infineon Technologies)	PLL BASED CLOCK DRIVER, 2308 SER	2500
CY22381FC IR (Infineon Technologies)	CLOCK GENERATOR	3548
CY2292SL-808 IR (Infineon Technologies)	PROGRAMMABLE PLL CLOCK GENERATOR	7578
W48C111-16H IR (Infineon Technologies)	PROCESSOR CLOCK GENERATOR	4197
CY25422FSXI IR (Infineon Technologies)	CLOCK GENERATOR, 166MHZ, CMOS, P	2509

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.