MAX9491

PRODUCTION

Factory-Programmable, Single PLL Clock Generator

Analog Devices MAX9491 Product Info

10 February 2026 4

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

Part details & applications

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.

Applications

Data Networking Systems
Home Entertainment Centers
SOHO
Telecommunications

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