DS1087LU-26A+

Overview

The DS1087LU-26A+ is a factory-programmed, spread-spectrum clock generator from the EconOscillator family. It produces a dithered square-wave output with frequencies ranging from 130kHz to 66.6MHz. The device operates on a single 2.7V to 3.6V supply and integrates nonvolatile EEPROM for standalone configuration without external timing components. Key features include selectable 2% or 4% dithering for EMI reduction, glitchless output enable control, and a 2-wire serial interface for user programmability via an internal divider.

Feature Summary

• Factory programmed square-wave generator covering 130kHz to 66.6MHz
• Integrated nonvolatile EEPROM stores settings for standalone operation
• Selectable 2% or 4% peak dithering reduces radiated emissions
• Glitchless output-enable and power-down control pins

Applications

• Printers
• Copiers
• PCs
• Computer Peripherals
• Cell Phones

Procurement Notes

Verify the specific frequency and dither percentage associated with the '26A' suffix against official manufacturer documentation, as standard listings typically use numeric codes (e.g., -266). Confirm package availability in 8-pin µSOP format and check current lifecycle status, as older Maxim Integrated parts may have limited stock or end-of-life designations.

Selection Notes

Select this component when a fixed-frequency, low-component-count clock source with inherent EMI spreading is required. Ensure the application voltage stays within the 2.7V to 3.6V range. If precise frequency tuning is needed post-production, utilize the 2-wire serial interface to adjust the prescaler divider, keeping in mind that the master oscillator frequency remains fixed.

Part Context

This part belongs to the DS1087L series of 3.3V Spread-Spectrum EconOscillators manufactured by Analog Devices Inc./Maxim Integrated. The series is designed to replace traditional crystal oscillators by integrating the oscillator circuitry directly into the IC, thereby reducing board space and assembly complexity while providing controlled spectral attenuation.

Replacement Considerations

Direct replacements must match the 8-pin µSOP package and 2.7V–3.6V supply range. Other DS1087L variants (e.g., DS1087LU-266+) offer similar functionality but differ in factory-programmed frequency and dither percentage. Verify electrical compatibility before substituting.