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Maxim > Products > Optoelectronics > MAX9491
Maxim > Products > Timekeeping, Timers, and Counters > MAX9491

MAX9491

Factory-Programmable, Single PLL Clock Generator

Overview

Technical Documents

Ordering Info

Status

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	Rev 0	(PDF, 304kB)
E-Mail

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

f_IN
(MHz)

f_OUT
(MHz)

Fixed or Continuous Frequency

Output Levels

Out-
puts

PLLs

Program-
mability

Spread Spectrum

Output Jitter
(ps)

V_SUPPLY
(V)

Package/Pins

Budgetary Price

min

max

min

max

RMS

See Notes

MAX9491

Ethernet

General Purpose

200

Fixed

LVCMOS

Factory One-Time Programmable (OTP)

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

Typical Operating Circuit

Application Notes

Application Note 3437		Solutions for Integrated Clock Sources Using the MAX9489/MAX9471 Multiple-Output Clock Generators
Application Note 3578		Audio Data Transmission in MAX9217/MAX9218 Video Link
Application Note 3736		How to Test the Crystal's Power Level in the MAX9485

Reliability Reports

Reliability Report:	MAX9491.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9491ETP010			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP010+			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP010+T			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP010-T			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP045			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP045+			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP045+T			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP045-T			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP080+			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP080+T			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9491ETP095			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491ETP095+			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP095+T			Active	TQFN;20 pin;26 mm² Outline Drawing:21-0140 (PDF) Land Pattern: 90-0010 (PDF) Use pkgcode/variation: T2055+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9491ETP095-T			Active	QFN;20 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491EUD			Active	TSSOP;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9491EUD-T			Active	TSSOP;14 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

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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[ 2006-02-13 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

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