MAX9491ETP080+T

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX9491ETP080+T is a factory-programmable, single PLL clock generator from Analog Devices/Maxim Integrated. It generates LVCMOS output frequencies ranging from 4MHz to 200MHz using an internal fractional-N PLL and integrated VCXO. The device operates on a +3.0V to +3.6V supply with total current consumption of 10mA at 45MHz output. It features low RMS jitter (<13ps at 197MHz) and supports crystal or reference clock inputs (5MHz–50MHz). The component is housed in a 20-pin TQFN package and functions within the -40°C to +85°C temperature range.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Factory-programmable OTP ROM for precise PLL frequency setting
• Integrated VCXO with ±200ppm tuning range via DC voltage input
• Low RMS jitter performance (<13ps typical at 197MHz)
• Single buffered LVCMOS clock output

Clock Generators, PLLs, Frequency Synthesizers Applications

• Telecommunications systems
• Data networking equipment
• Home entertainment centers
• Small office/home office (SOHO) devices

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the ordering suffix '080' corresponds to the specific factory-programmed frequency required for the application. Confirm the package type matches the design footprint, as the MAX9491 is also available in 14-pin TSSOP. Ensure compatibility with the 3.3V power domain and check for any end-of-life notices regarding this specific variant.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a fixed, factory-set clock frequency between 4MHz and 200MHz is needed without external programming. Choose the TQFN package for compact layouts requiring thermal dissipation via the exposed pad. Ensure the system requires LVCMOS outputs and can accommodate the 10mA supply current. Verify that the required frequency is supported by Maxim's factory programming options.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MAX9491 belongs to a family of multipurpose clock generators designed for communication applications. Variants like the MAX9491ETP045+T and MAX9491ETP095+T differ primarily in their factory-programmed output frequencies. The ETP suffix denotes the 20-pin TQFN package with an exposed paddle, distinguishing it from the EUD series which uses a 14-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other MAX9491 variants such as MAX9491ETP045+T or MAX9491ETP095+T if the specific frequency differs but pinout and functionality remain identical. For different packages, the MAX9491EUD series offers the same electrical characteristics in a 14-pin TSSOP form factor.