Clock/Timing - Application Specific

Part Number	Description / PDF	Quantity
9FGU0441AKILFT Renesas Electronics America	VFQFPN 5.00X5.00X0.90 MM, 0.50MM	0
9DB1933AKLFT Renesas Electronics America	IC CLK FANOUT/BUFF ZD 72VFQFN	0
9EPRS525AGLF Renesas Electronics America	IC EMBEDDED PC MAIN CLK 56TSSOP	24
9248DF-39LF Renesas Electronics America	IC GEN/BUFFER PENTIUM PRO 48SSOP	2
82V3001APVG8 Renesas Electronics America	IC PLL WAN W/SGL REF INP 56-SSOP	0
8430S10BYI-02LFT Renesas Electronics America	IC CLK GENERATOR PLL 48TQFP	0
MK1491-09FILNTR Renesas Electronics America	IC CLK FREQ SYNTH CPU 66MHZ	857
98ULPA877AHLF Renesas Electronics America	IC CLOCK DRIVER 1.8V LP 52-BGA	0
9LRS3197AKLFT Renesas Electronics America	IC PC MAIN CLOCK 32VFQFPN	0
9DBL0452BKILFT Renesas Electronics America	IC CLK BUFFER ZD 32-VFQFPN	0
9FGV0231AKLF Renesas Electronics America	IC CLOCK GENERATOR 24VFQFPN	136
954201BGLFT Renesas Electronics America	IC TIMING CTRL HUB PROGR 56TSSOP	1202
5V41234NLGI Renesas Electronics America	IC CLK GEN SPRED SPECTRM 16QFN	2757
843441AM-100LF Renesas Electronics America	IC CLK GEN SAS/SATA 8SOIC	97
9LRS3187BKLFT Renesas Electronics America	IC TIMING CTRL HUB PROG 32MLF	0
9FGV0441AKLF Renesas Electronics America	IC CLOCK GENERATOR 32MLF	1737
952906BGLFT Renesas Electronics America	IC TIMING CTRL HUB P4 48-TSSOP	0
9DB433AGLFT Renesas Electronics America	IC CLK FANOUT/BUFF ZD 28TSSOP	9542
4RCD0124KC0ATG Renesas Electronics America	DDR4 REGISTER	67
9FGL0251BKILF Renesas Electronics America	IC CLK GENERATOR 24QFN	0

Clock/Timing - Application Specific

1. Overview

Application-Specific Clock/Timing ICs are specialized semiconductor devices designed to generate, distribute, and manage precise timing signals for targeted system requirements. Unlike general-purpose timing solutions, these ICs integrate optimized architectures for specific performance metrics such as ultra-low jitter, high-frequency stability, or specialized synchronization protocols. They play a critical role in ensuring system reliability, data integrity, and operational efficiency across modern electronics, from telecommunications infrastructure to automotive control systems.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
Real-Time Clocks (RTC)	Low-power timekeeping with calendar functions, often integrated with memory	Computers, smart meters, medical devices
Clock Generators	Multi-output frequency synthesis with programmable phase alignment	Networking equipment, FPGAs, servers
Jitter Attenuators	Phase noise reduction using advanced PLL architectures	5G base stations, high-speed transceivers
Fanout Buffers	Signal replication with skew control and impedance matching	Industrial automation, PCIe systems
Clock Controllers	Dynamic frequency switching and redundancy management	Automotive ADAS, aerospace systems

3. Structure and Composition

Typical devices feature:

Package Types: QFN, BGA, TSSOP (sizes from 2x2mm to 14x14mm)
Core Components: Crystal oscillator interface, fractional-N PLL, programmable dividers, LVDS/CML output drivers
Specialized Circuits: Spread-spectrum control, failover multiplexers, temperature compensation modules
Power Management: Multiple voltage domains, low-dropout regulators for analog/digital isolation

4. Key Technical Specifications

Parameter	Significance	Typical Values
Frequency Range	Determines application suitability	1kHz 1GHz
Phase Jitter (RMS)	Impacts signal integrity in high-speed systems	50fs 5ps
Power Supply Range	Affects system design flexibility	1.8V 5.5V
Operating Temperature	Defines environmental robustness	-40 C to +125 C
Phase Noise @1MHz Offset	Critical for RF/wireless applications	-155dBc/Hz

5. Application Fields

Telecommunications: 5G massive MIMO arrays, optical transceivers
Industrial: Programmable logic controllers (PLCs), precision test equipment
Automotive: Advanced driver assistance systems (ADAS), vehicle networking
Consumer Electronics: High-resolution displays, AR/VR headsets

6. Leading Manufacturers and Products

Vendor	Product Series	Key Features
TI (Texas Instruments)	CDCM62xx	3.2GHz clock generator with 50fs jitter
STMicroelectronics	M41Txx RTC	2ppm accuracy with embedded EEPROM
Microchip Technology	ZL303xx	IEEE 1588 boundary clock synchronization
Analog Devices	HMC7044	14-output jitter attenuator for RF systems

7. Selection Guidelines

Application Requirements: Prioritize jitter specifications for communications vs. power consumption for portable devices
Frequency Precision: Use MEMS-based oscillators for vibration resistance in automotive applications
Environmental Factors: Select industrial-grade (-40 to +85 C) for outdoor equipment
Integration Level: Combine clock generation + buffering in single chip for space-constrained designs
Compliance: Verify automotive (AEC-Q100), aerospace (ECSS) certifications

8. Industry Trends

Emerging directions include:

Integration of AI-driven phase calibration algorithms
Development of chip-scale atomic clock (CSAC) technology for sub-ppb stability
Adoption of 3D packaging to minimize parasitic capacitance
Increasing demand for multi-standard timing solutions (5G+GNSS+Ethernet)
Growth of energy-harvesting RTC ICs for IoT edge devices