Clock/Timing - Application Specific

Part Number	Description / PDF	Quantity
SY87739LHY Roving Networks / Microchip Technology	IC SYNTHESIZER FRACTION N 32TQFP	180
ZL30121GGG2V2 Roving Networks / Microchip Technology	IC SONET/SDH SYNCH 100CABGA	520
DSC557-0344FI0T Roving Networks / Microchip Technology	MEMS OSC XO 100.0000MHZ HCSL SMD	0
ZL30621LFF7 Roving Networks / Microchip Technology	SINGLE CHANNEL ULTRA LOW JITTER	0
SY897132LKG Roving Networks / Microchip Technology	IC CLK LINK REPLICATOR HDTV	0
ZL30111QDG1 Roving Networks / Microchip Technology	IC POTS LINE CARD PLL 64TQFP	0
MAX24188ETK2 Roving Networks / Microchip Technology	IC CLOCK SYNCHRONIZER 68TQFN	0
ZL30110LDG1 Roving Networks / Microchip Technology	IC DPLL RATE CONVERSION 32QFN	0
SY87701VZH Roving Networks / Microchip Technology	IC CLOCK/DATA RECOVERY 28-SOIC	47
ZL30123GGG2 Roving Networks / Microchip Technology	IC SONET/SDH SYNCH 100CABGA	0
ZL30131GGG2 Roving Networks / Microchip Technology	IC NETWORK SYNCHRONIZER 100LFBGA	0
ZL30722LDG1 Roving Networks / Microchip Technology	SINGLE CHANNEL SYNCE & IEEE 1588	0
DSC557-054444KI1 Roving Networks / Microchip Technology	MEMS OSC XO 100.0000MHZ HCSL SMD	148
ZL30132GGG2 Roving Networks / Microchip Technology	IC NETWORK SYNCHRONIZER 64CABGA	0
ZL30255LFG7 Roving Networks / Microchip Technology	DUAL-CHANNEL ANY-TO-ANY CLOCK MU	0
ZL30723LFG7 Roving Networks / Microchip Technology	DUAL CHANNEL SYNCE & IEEE 1588 T	0
ZL30117GGG2 Roving Networks / Microchip Technology	IC SONET/SDH SYNCH 64CABGA	0
ZL30138GGG2 Roving Networks / Microchip Technology	IC SONET/SDH SYNCH 100LFBGA	0
VSC7227YKV Roving Networks / Microchip Technology	MULTIRATE 14.5 GBPS 12-CHANNEL R	157
ZL30343GGG2 Roving Networks / Microchip Technology	IC SYNCE/SONET/SDH 100LFBGA	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