DS1087LU-266+

Overview

The DS1087LU-266+ is a factory-programmed clock generator producing a spread-spectrum square-wave output at 66.6MHz with 2% dither. Operating on a 2.7V to 3.6V supply, it integrates a master oscillator and nonvolatile EEPROM for standalone configuration. The device features a 2-wire serial interface for programmable frequency division down to 130kHz, selectable dither levels, and glitchless output enable control. Packaged in an 8-pin µSOP, it supports power-down modes and synchronous gating to minimize electromagnetic interference in digital systems.

Feature Summary

• Factory programmed 66.6MHz output with 2% spread-spectrum dither
• Internal master oscillator eliminates external timing components
• Nonvolatile EEPROM stores settings for standalone operation
• 2-wire serial interface allows user programming of divider and dither

Applications

• Printers
• Copiers
• PCs
• Computer Peripherals
• Cable Modems

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature range. Confirm RoHS compliance status as some variants may differ. Check current availability through authorized distributors, as lead times and stock levels fluctuate. Ensure the component matches the required 8-pin µSOP footprint for PCB integration.

Selection Notes

Select this model when a fixed 66.6MHz clock with 2% spectral spreading is required. It is suitable for applications needing EMI reduction without external crystals. Consider the 2-wire interface if dynamic reconfiguration via a microcontroller is necessary. Verify that the 2.7V to 3.6V supply voltage aligns with the system design constraints.

Part Context

The DS1087L belongs to Maxim Integrated's EconOscillator family of spread-spectrum clock generators. This series provides factory-programmed frequencies ranging from 130kHz to 66.6MHz. The DS1087LU-266+ specifically denotes the 66.6MHz variant with 2% dither in the lead-free (indicated by '+') µSOP package, designed for low-power, space-constrained digital circuits.

Replacement Considerations

Direct replacements within the same family include DS1087LU-466 for 66.6MHz with 4% dither, or DS1087LU-216 for 16.6MHz with 2% dither. Other frequencies are available by contacting the manufacturer for custom programming. Cross-model substitution requires verifying pin compatibility and electrical specifications.