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MAX3679
+3.3V, Low-Jitter Crystal to LVPECL Clock Generator
Industry's Lowest Jitter PLL Clock Generator for Ethernet Applications
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Status
All versions are Not Recommended for New Designs. See Ordering Information for recommended replacements.
Description
The MAX3679 is a low-jitter precision clock generator with the integration of three LVPECL and one LVCMOS outputs optimized for Ethernet applications. The device integrates a crystal oscillator and a phase-locked loop (PLL) clock multiplier to generate high-frequency clock outputs for Ethernet applications.
Maxim's proprietary PLL design features ultra-low jitter (0.36psRMS) and excellent power-supply noise rejection, minimizing design risk for network equipment.
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Data Sheet
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Key Features
- Crystal Oscillator Interface: 25MHz
- CMOS Input: 25MHz
- Output Frequencies for Ethernet
- 62.5MHz, 125MHz, 156.25MHz, 312.5MHz
- Low Jitter
- 0.14psRMS (1.875MHz to 20MHz)
- 0.36psRMS (12kHz to 20MHz)
- Excellent Power-Supply Noise Rejection
- No External Loop Filter Capacitor Required
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Applications/Uses
- Ethernet Networking Equipment
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Diagram
Typical Application Circuit
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX3679CTJ+
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NRND |
MAX3679AETJ+
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TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0001 (PDF)
Use pkgcode/variation: T3255+3*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX3679CTJ+T
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NRND |
MAX3679AETJ+
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QFN;
Land Pattern: Not Available
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0°C to +70°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Similar Products by Function
| MAX3625 |
Low-Jitter, Precision Clock Generator with Three Outputs |
| MAX3674 |
High-Performance, Dual-Output, Network Clock Synthesizer |
| MAX3678 |
Low-Jitter Frequency Synthesizer with Intelligent Dynamic Switching |
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Information Index
Document Ref.: 19-4374
Rev 0;
2008-12-23
This page last modified: 2009-07-08
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