Clock/Timing - Application Specific

Image	Part Number	Description / PDF	Quantity	Rfq
	9EX21831AKLFT Renesas Electronics America	IC FANOUT/BUFFER DIFF 72VFQFN	0
	952601EFLF Renesas Electronics America	IC TIMING CTRL HUB P4 56-SSOP	0
	ICS9248DF-39T Renesas Electronics America	IC GEN/BUFFER PENTIUM PRO 48SSOP	0
	93789DFLFT Renesas Electronics America	IC DDR FANOUT BUFFER 28-SSOP	0
	ICS9169M-01 Renesas Electronics America	IC FREQUENCY GENERATOR 28-SOIC	0
	ICS9FG104CGLF Renesas Electronics America	IC FREQ TIMING GENERATOR 28TSSOP	0
	9SQL4958CNDGI Renesas Electronics America	IC CLK GENERATOR PCIE 48VFQFPN	0
	ICS9161A-01CW16 Renesas Electronics America	IC FREQUENCY GENERATOR 16-SOIC	0
	IDT5T929-30NLGI8 Renesas Electronics America	IC CLOCK GENERATOR PREC 28VFQFPN	0
	ICS954129BFLF Renesas Electronics America	IC TIMING CTRL HUB P4 56-SSOP	0
	93732AFLF Renesas Electronics America	IC CLK BUF DDR 340MHZ 1CIRC	0
	93777BFLF Renesas Electronics America	IC DDR PLL ZD BUFFER 28-SSOP	0
	95V850AGLFT Renesas Electronics America	IC CLK BUF DDR 210MHZ 1CIRC	0
	95V857AHLFT Renesas Electronics America	IC CLK BUF DDR 233MHZ 1CIRC	0
	ICS95V857AKT Renesas Electronics America	IC CLK BUF DDR 233MHZ 1CIRC	0
	9FG1200DF-1LF Renesas Electronics America	IC FREQUENCY GENERATOR 56-SSOP	0
	IDT5T940-10NLGI8 Renesas Electronics America	IC CLK GENERATOR PREC 28-VFQFPN	0
	ICS952101CFT Renesas Electronics America	IC FREQ GENERATOR 56-SSOP	0
	93V855AGIT Renesas Electronics America	IC CLK BUF DDR 233MHZ 1CIRC	0
	93716BGLF Renesas Electronics America	IC CLK BUF DDR 233MHZ 1CIRC	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