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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All versions are Not Recommended for New Designs.

Description

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.

Data Sheet

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Key Features

  • 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
 

Applications/Uses

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

Diagram

MAX9486: Typical Application Circuit
Typical Application Circuit

More Information

New Product Press Release   2004-08-27 ]

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