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Datasheet Microchip SY89228UMG-TR

Part NumberSY89228UMG-TR

The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output


  • Download » Datasheet PDF, 535 Kb, File published: Nov 11, 2015
    SY89228U Data Sheet
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    1GHz Precision, LVPECL Г 3, Г 5 Clock Divider
    with Fail-Safe Input and Internal Termination General Description
    The SY89228U is a precision, low jitter 1GHz Г 3, Г 5
    clock divider with an LVPECL output. A unique FailSafe Input (FSI) protection prevents metastable
    output conditions when the input clock voltage swing
    drops significantly below 100mV or input is removed.
    The differential input includes Micrel’s unique, 3-pin
    internal termination architecture that allows the input
    to interface to any differential signal (AC-or DCcoupled) as small as 100mV (200mVPP) without any
    level shifting or termination resistor networks in the
    signal path. The outputs are 800mV, 100Kcompatible LVPECL with fast rise/fall times
    guaranteed to be less than 270ps.
    The SY89228U operates from a 2.5V В±5% or 3.3V
    В±10% supply and is guaranteed over the full
    industrial temperature range of –40°C to +85°C. The
    SY89228U is part of Micrel’s high-speed, Precision
    Edge product line.
    All support documentation can be found on Micrel’s
    web site at: Block Diagram Precision Edge В® Features Accepts a high-speed input and provides a precision
    Г 3 and Г 5 sub-rate, LVPECL output Fail-Safe Input
    – Prevents oscillations when input is invalid Guaranteed AC performance over temperature and ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




DescriptionГ·3, Г·5;1 Output
Fail-Safe InputYes FSI
Input TypeANY
Output Frequency1 Max
Output TypeLVPECL
Propagation Delay1500 Max
Supply Voltage2.5/3.3V V
Within Device Skew450 Max

Eco Plan


Moldel Line

Series: SY89228U (2)

Manufacturer's Classification

  • Clock and Timing > Clock and Data Distribution > Dividers

Other Names:


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