QuickView - MAX3678 Low-Jitter Frequency Synthesizer with Intelligent Dynamic Switching Page 1 of 2 ENGLISH • 简体中文 • 日本語 • 한국어 Login | Register Enter keywords or part number What's New Products Solutions Design AppNotes Support Sales About Us Members Maxim > Products > [Optoelectronics] [Storage Products (SAS/SATA/Enclosure Management)] MAX3678 Low-Jitter Frequency Synthesizer with Intelligent Dynamic Switching Industry's Best Jitter Performance Exceeds SerDes Reference Clock Specification QuickView Technical Documents Ordering Info More Information User Comments (0) All Status Active: In Production. Description The MAX3678 is a low-jitter frequency synthesizer with intelligent dynamic clock switching optimized for Request Full Data Sheet systems where redundant clock failover switching is needed. It contains a monolithic phase-locked loop (PLL) that accepts two reference clock inputs and generates nine phase-aligned outputs. The device continuously monitors the signal status for both reference clock inputs. In the event that the primary clock fails, the PLL automatically switches to the secondary clock input without generating a phase bump at the clock outputs, using a glitchless switchover mechanism. A manual switch mode is also provided for user-controlled switching. The device features ultra-low jitter generation of 0.3psRMS (integrated 12kHz to 20MHz) and excellent power-supply noise rejection. The MAX3678 operates from a single +3.3V supply and typically consumes 400mW. The operating temperature range is from 0°C to +85°C, and is available in a 8mm x 8mm, 56-pin TQFN package. An evaluation kit is available: MAX3678EVKIT Key Features z z z z z z Two Reference Clock Inputs: LVPECL Nine Phase-Aligned Clock Outputs: LVPECL Automatic or Manual Dynamic Switching Between Two Reference Clock Inputs Input Frequencies: 66.67MHz, 133.33MHz, 266.67MHz, 333.33MHz Output Frequencies: 66.67MHz, 133.33MHz, 266.67MHz, 333.33MHz Low-Jitter Generation: 0.3psRMS (12kHz to 20MHz) z z z z z Clock Failure Indicator for Both Reference Clocks External Feedback Provides Zero-Delay Capability Low Output Skew: 20ps Typical Typical Power Dissipation: 400mW at +3.3V Operating Temperature: 0°C to +85°C Key Specifications: Clock Generators Part Applications Number fIN fOUT fOUT fIN (MHz) (MHz) (MHz) (MHz) min MAX3678 General Purpose max min max Output Price Jitter Fixed or VSUPPLY Output OutProgram- Spread (ps) Package/Pins Continuous PLLs Levels puts mability Spectrum (V) Frequency See RMS Notes 66.67 333.33 66.67 333.33 Fixed LVPECL 9 1 Pin No 0.28 3.3 TQFN/56 $14.66 @1k See All Clock Generators (27) Didn't Find What You Need? z Next Day Product Selection Assistance from Applications Engineers z Parametric Search z Applications Help QuickView Technical Documents Ordering Info More Information Description Key Features Applications/Uses Key Specifications Data Sheet Application Notes Design Guides Engineering Journals Price and Availability Samples Buy Online Package Information Related Products Notes and Comments Evaluation Kits http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5690 11/9/2009 QuickView - MAX3678 Low-Jitter Frequency Synthesizer with Intelligent Dynamic Switching Diagram Reliability Reports Software/Models Evaluation Kits Page 2 of 2 Lead-Free Information Document Ref.: 19-4115; Rev 0; 2008-05-23 This page last modified: 2008-09-12 Contact Us • Rate This Page • Mail This Page • Privacy Policy • Legal Notices Copyright © 2009 by Maxim Integrated Products http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5690 11/9/2009