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MAX9486
8kHz Reference Clock Synthesizer with Multiple Outputs at 35.328MHz

Clock Generator Optimized for xDSL CO Line Cards and Telecom Systems Requiring Low-Jitter Clock Outputs


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Description
FULL DATA SHEET (PDF, 552kB)
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The MAX9486 low-cost, high-performance clock synthesizer with an 8kHz input reference clock provides six buffered LVTTL clock outputs at 35.328MHz. The clock synthesizer can be used to generate the clocks for T1, E1, T3, E3, and xDSL.

The MAX9486 has two phase-lock loops (PLLs). The first PLL uses a voltage-controlled crystal oscillator (VCXO). The second PLL is a frequency multiplier. With the two PLLs, the MAX9486 generates the output frequency at 35.328MHz. In addition, this device generates a jitter-suppressed 8kHz output that provides a better source for the reference clock relay.

The MAX9486 is available in a 24-pin TSSOP package and operates over the extended operating temperature range of -40°C to +85°C and a single +3V to +3.6V power-supply range.

Key Features   Applications/Uses
  • 8kHz Input Reference CLK
  • High-Jitter Rejection on the Reference CLK
  • Synthesizer Locks to the 8kHz Reference with a ±200ppm Range
  • Output Frequency: 35.328MHz
  • Six Buffered LVTTL Low-Jitter Outputs
  • One 8kHz Reference CLK Relay Output
  • +3.3V Supply Operation
  • 24-Pin TSSOP Package

     
  • Telecom Equipment Using T1, E1, T3, E3, and ISDN Protocols
  • xDSL Equipment in CO with Interface to the Telecom Protocols

    Key Specifications:   Clock Generators
    Part Number Applications fIN (min) (MHz) fIN (max) (MHz) fOUT (min) (MHz) fOUT (max) (MHz) Fixed or Continuous Frequency Output Levels Number of Outputs Number of PLLs Spread Spectrum Output Jitter (RMS) Supply Voltage (V) Package Price**
    MAX9486 
    T1/E1
    T3/E3
    xDSL
    0.008 0.008 35.328 35.328 Fixed LVCMOS 6 2 No 15 3.3 TSSOP/24 $6.75 @ 1k
    See All Clock Generators (23)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX9486: Typical Application Circuit
    Typical Application Circuit

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    Document Ref.: 19-3345; Rev 0; 2004-08-10
    This page last modified: 2005-07-06



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