MAX3629

+3.3V, Low-Jitter, Precision Clock Generator with Multiple Outputs

Generates All Ethernet Frequencies with Multiple Outputs Using a Low-Frequency Crystal

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Status Explanations for product status codes

Active: In Production.

Description

The MAX3629 is a low-jitter precision clock generator optimized for network applications. The device integrates a crystal oscillator and a phase-locked loop (PLL) to generate high-frequency clock outputs for Ethernet applications.

Maxim's proprietary PLL design features ultra-low jitter (0.4psRMS) and excellent power-supply noise rejection (PSNR), minimizing design risk for network equipment.

The MAX3629 contains five LVDS outputs and three LVCMOS outputs. The output frequencies are selectable among 125MHz, 156.25MHz, and 312.5MHz by pin control.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 540kB)
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Key Features

  • Crystal Oscillator Interface: 25MHz
  • OSC_IN Interface:
    • PLL Enabled: 25MHz
    • PLL Disabled: 20MHz to 320MHz
  • Outputs:
    • One LVDS Output at 125MHz/156.25MHz/312.5MHz (Selectable with FSELA)
    • Four LVDS Outputs at 125MHz/156.25MHz/312.5MHz (Selectable with FSELB)
    • Three LVCMOS Outputs at 125MHz/156.25MHz (Selectable with FSELB)
  • Low Phase Jitter: 0.4psRMS (12kHz to 20MHz)
  • Excellent PSNR
  • Operating Temperature Range: 0°C to +70°C
 

Applications/Uses

  • Ethernet Networking Equipment
   

Key Specifications:

Clock Generators
Part Number Applications fIN
(MHz)
fIN
(MHz)
fOUT
(MHz)
fOUT
(MHz)
Fixed or Continuous Frequency Output Levels Out-
puts
PLLs Spread Spectrum Output Jitter
(ps)
VSUPPLY
(V)
Package/Pins Budgetary Price
min max min max RMS See Notes
MAX3629  Ethernet 25 25 125 312.5 Fixed
LVCMOS
LVDS
8 1 No 0.4 3.3
TQFN/32
$9.41 @1k
See All Clock Generators (34)
Pricing 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

MAX3629: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release 2009-08-03 ]

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Information Index

Document Ref.: 19-4467 Rev 0; 2009-02-10
This page last modified: 2009-07-08




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