MAX31C80T-UGQ+

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX31C80T-UGQ+ is a spread-spectrum clock generator from the MAX31C80/MAX31D80 family, manufactured by Analog Devices / Maxim Integrated. It utilizes an internal phase-locked loop (PLL) to generate a frequency-modulated clock output ranging from 2MHz to 134MHz based on an input crystal or clock signal. This specific part provides a center-dithered spread-spectrum output with a factory-programmed configuration of 27MHz input and 100MHz output at a 31.25kHz dither rate. The device operates over an automotive temperature range (-40°C to +125°C), requires a 3.3V supply voltage, and is housed in a compact 10-pin TDFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates spread-spectrum clock outputs between 2MHz and 134MHz using an internal PLL
• Factory-programmable for specific input/output frequencies and dither rates
• Supports center-dithered modulation mode with user-configurable magnitude via SMSEL pins
• Operates within the -40°C to +125°C automotive temperature range

Clock Generators, PLLs, Frequency Synthesizers Applications

• Graphics Cards
• Set-Top Boxes
• Automotive Infotainment Systems
• Printers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging and '+' denotes lead-free/RoHS compliance. Confirm the specific factory-programmed parameters (27MHz input, 100MHz output, 31.25kHz dither rate) match the design requirements. Ensure the 10-pin TDFN footprint aligns with the PCB layout specifications.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a center-dithered spread-spectrum clock is required for EMI reduction. Compare against the MAX31D80 variant if down-dithering is preferred instead. Verify that the input source can be either an 8MHz–34MHz crystal or an 8MHz–134MHz clock signal. Check power supply decoupling requirements near the VCC pins.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the MAX31C80/MAX31D80 series of spread-spectrum clock generators. It shares the same physical package and core PLL architecture as other variants in the family, differing primarily in the factory-set output frequency, dither rate, and dither type (center vs. down).

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The MAX31D80T-UGQ+ serves as a functional substitute if down-dithering is acceptable instead of center-dithering. Other MAX31C80 variants with different output frequencies may replace this unit if the electrical parameters are adjusted accordingly.