Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
NB2304AI2DG Sanyo Semiconductor/ON Semiconductor	IC BUFFER CLOCK QUAD 3.3V 8-SOIC	0
NBC12430FNR2G Sanyo Semiconductor/ON Semiconductor	IC CLK PLL SYNC 50-800MHZ 28PLCC	0
NB3N51044DTR2G Sanyo Semiconductor/ON Semiconductor	IC CLK GEN HCSL/LVDS 28W-TSSOP	0
NB3H63143G00MNR2G Sanyo Semiconductor/ON Semiconductor	IC CLOCK GENERATOR PROGR 16QFN	2919
NB3W1200LMNG Sanyo Semiconductor/ON Semiconductor	IC CLK ZDB/FANOUT BUFFER 64QFN	52
MC100LVEP34DG Sanyo Semiconductor/ON Semiconductor	IC CLOCK GEN ECL 2/4/8 16SOIC	888784
MCH12140DG Sanyo Semiconductor/ON Semiconductor	IC DETECTOR PHASE FREQ 8SOIC	0
NB3N1200KMNG Sanyo Semiconductor/ON Semiconductor	IC CLOCK ZDB FANOUT BUFFER 64QFN	260
MC100EP140DR2G Sanyo Semiconductor/ON Semiconductor	IC DETECT PHASE-FREQ ECL 8-SOIC	0
MC100LVEL40DWG Sanyo Semiconductor/ON Semiconductor	IC DETECT PHASE FREQ ECL 20SOIC	27152
NB4N507ADR2G Sanyo Semiconductor/ON Semiconductor	IC SYNTHESIZER CLK PECL 16-SOIC	0
NBC12430AFNG Sanyo Semiconductor/ON Semiconductor	IC CLOCK SYNTH 50-800MHZ 28-PLCC	15814
NB2304AI1DR2G Sanyo Semiconductor/ON Semiconductor	IC BUFFER CLOCK QUAD 3.3V 8-SOIC	4711
MC12093DG Sanyo Semiconductor/ON Semiconductor	IC PRESCALER 2/4/8 1.1GHZ 8SOIC	25593430
MC12080DR2G Sanyo Semiconductor/ON Semiconductor	IC PRESCALER SGL 1.1GHZ 8-SOIC	0
NB3N51034DTG Sanyo Semiconductor/ON Semiconductor	IC CLK GEN CRYST1:4 HCSL 20TSSOP	904950
NB2304AI2DR2G Sanyo Semiconductor/ON Semiconductor	IC BUFFER CLOCK QUAD 3.3V 8-SOIC	872
NB3N51054DTG Sanyo Semiconductor/ON Semiconductor	IC CLK GEN HCSL/LVDS 24-TSSOP	898990
NB2305AI1HDR2G Sanyo Semiconductor/ON Semiconductor	IC BUFFER CLOCK 5OUT 3.3V 8-SOIC	1960
LC72137MA-AE Sanyo Semiconductor/ON Semiconductor	IC PLL FREQ SYSTHESIZER MFP20	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.