DS1080LU+T

Overview

The DS1080LU+T is a low-jitter, crystal-based spread-spectrum clock generator manufactured by Analog Devices (Maxim Integrated). It utilizes an integrated phase-locked loop to generate output frequencies from 16MHz to 134MHz. The device supports selectable clock multiplier rates of 1x, 2x, and 4x, along with center spread-spectrum dithering magnitudes of ±0.5%, ±1.0%, and ±1.5%. It operates on a single 3.0V to 3.6V supply within a temperature range of -40°C to +125°C. The component is housed in an 8-lead µSOP package and includes power-down and spread-spectrum disable modes.

Feature Summary

• Generates spread-spectrum clocks from 16MHz to 134MHz using a crystal or external clock input
• Pin-programmable clock multipliers: 1x, 2x, and 4x via CMSEL pin
• Selectable dither magnitudes: ±0.5%, ±1.0%, and ±1.5% via SMSEL pin
• Low cycle-to-cycle jitter (75ps typical at 16MHz) and high-impedance power-down mode

Applications

• Automotive systems
• Cable modems
• PCs and computer peripherals
• Printers and copiers
• Infotainment units

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging as specified in the ordering information. Confirm RoHS compliance status for the specific lot. Check current availability as distribution may vary. Ensure the design accommodates the 8-lead µSOP footprint and required load capacitors for the connected crystal.

Selection Notes

Select this component when a fixed-frequency crystal multiplier with spread-spectrum capabilities is required. Verify that the input crystal frequency falls between 16MHz and 33.4MHz and has an ESR below 90Ω. Ensure the target output frequency does not exceed 134MHz. Consider the ±1.5% maximum dither magnitude if EMC reduction is critical.

Part Context

The DS1080L belongs to Maxim's EconOscillator family of silicon oscillators designed to replace traditional crystals and resonators. The LU+ designation indicates a lead-free/RoHS-compliant version operating in the industrial temperature range (-40°C to +125°C). The T suffix specifically denotes the reel packaging format for automated assembly.

Replacement Considerations

Datasheet references indicate the DS1086LU and DS1089LU are related spread-spectrum oscillator models within the same product family. These alternatives should be evaluated based on specific frequency requirements and dither characteristics.