MAX9491

Factory-Programmable, Single PLL Clock Generator

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Status Explanations for product status codes

Active: In Production.

Description

The MAX9491 multipurpose clock generator is ideal for communication applications. It offers a factory-programmable PLL output that can be set to almost any frequency, ranging from 4MHz to 200MHz. The MAX9491 uses a one-time-programmable (OTP) ROM to program the PLL output. The MAX9491 also features an integrated voltage-controlled crystal oscillator (VCXO) that is tuned by a DC voltage. The VCXO output is used as the PLL input. The VCXO has a wide ±200ppm (typ) tuning range. The OTP on the MAX9491 is factory preset, based upon the customer request. Contact the factory for samples with preferred frequencies.

The device operates from a 3.3V supply and is specified over the -40°C to +85°C extended temperature range. The MAX9491 is available in 14-pin TSSOP and 20-pin TQFN (5mm x 5mm) packages.

 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 304kB)
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Key Features

  • 5MHz to 35MHz for Crystal-Clock Reference
  • 5MHz to 50MHz for a Driver Clock Reference
  • One Fractional-N PLL with Buffered Output
  • 4MHz to 200MHz Output Frequency Range
  • Low RMS Jitter PLL (< 13ps) at 197 MHz
  • Integrated VCXO with ±200ppm Tuning Range
  • Available in 14-Pin TSSOP and 20-Pin TQFN Packages
  • +3.3V Supply
  • -40°C to +85°C Temperature Range
 

Applications/Uses

  • Data Networking Systems
  • Home Entertainment Centers
  • SOHO
  • Telecommunications
   

Key Specifications:

Clock Generators
Part Number Applications fIN
(MHz)
fIN
(MHz)
fOUT
(MHz)
fOUT
(MHz)
Fixed or Continuous Frequency Output Levels Out-
puts
PLLs Program-
mability
Spread Spectrum Output Jitter
(ps)
VSUPPLY
(V)
Package/Pins Budgetary Price
min max min max RMS See Notes
MAX9491 
Ethernet
General Purpose
5 50 4 200 Fixed LVCMOS 1 1 Factory One-Time Programmable (OTP) No 4 3.3
TQFN/20
$1.20 @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

MAX9491: Typical Operating Circuit
Typical Operating Circuit

More Information

New Product Press Release 2006-02-13 ]

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Information Index

Document Ref.: 19-3942 Rev 0; 2006-02-07
This page last modified: 2006-02-13




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