MAX3679
+3.3V, Low-Jitter Crystal to LVPECL Clock Generator
Industry's Lowest Jitter PLL Clock Generator for Ethernet Applications
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.RMS ) and excellent power-supply noise rejection, minimizing design risk for network equipment.
Key Features
Applications/Uses
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
Ethernet Networking Equipment
Key Specifications: Clock Generators
Part Number
Applications
fIN
fIN
fOUT
fOUT
Fixed or Continuous Frequency
Output Levels
Out-
PLLs
Program-
Spread Spectrum
Output Jitter
VSUPPLY
Package/Pins
Price
min
max
min
max
RMS
See Notes
DS1080CL General Purpose
8
16
8
64
Fixed
LVCMOS
1
1
Pin
Yes
75
3.3
$1.11 @1k
See All Clock Generators (25)
Diagram
Typical Application Circuit
Ordering Information
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. More: SeeFull Data Sheet or Part 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.
Free
Buy
Status
Recommended Replacement
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free?
MAX3679CTJ+T
NRND
MAX3679AETJ+
0°C to +70°C
See data sheet
MAX3679CTJ+
NRND
MAX3679AETJ+
TQFN;32 pin;26 mm²
21-0140 (PDF)
90-0001 (PDF)*
0°C to +70°C
RoHS/Lead-Free: Lead Free
Materials Analysis
Related Products
MAX3625 Low-Jitter, Precision Clock Generator with Three OutputsMAX3674 High-Performance, Dual-Output, Network Clock SynthesizerMAX3678 Low-Jitter Frequency Synthesizer with Intelligent Dynamic Switching
Didn't Find What You Need?
Document Ref.: 19-4374;
Rev 0;
2008-12-23
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