DS1087LU-40K+

Overview

The DS1087LU-40K+ is a factory-programmed clock generator producing a spread-spectrum square-wave output from 130kHz to 66.6MHz. It operates on a 2.7V to 3.6V supply and features nonvolatile EEPROM storage for settings, enabling standalone operation without external timing components. The device includes a user-accessible internal frequency divider, selectable 2% or 4% dithered output via the SPRD pin, and programmable power-down modes controlled by dedicated pins.

Feature Summary

• Factory programmed square-wave generator with frequencies up to 66.6MHz
• Spread-spectrum capability with 2% or 4% selectable dithering for EMI reduction
• Nonvolatile EEPROM storage retains settings in standalone applications
• Glitchless output-enable control and programmable power-down mode

Applications

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

Procurement Notes

Verify the specific meaning of the 'K' suffix against official documentation, as standard listings typically use numeric codes for frequency and dither percentage. Confirm current availability status, as many variants in this series are marked as obsolete or end-of-life. Ensure the component meets RoHS compliance requirements for the intended application environment.

Selection Notes

Select this component when a fixed-frequency, low-component-count clock source with EMI reduction is required. The DS1087L supports a master oscillator range of 33.3MHz to 66.6MHz, divided down to 130kHz. Verify that the 2-wire serial interface compatibility matches the system controller's I/O capabilities and voltage levels.

Part Context

This part belongs to the DS1087L EconOscillator family, which provides spread-spectrum clock generation in an 8-pin µSOP package. The series is designed to replace discrete crystal oscillators, reducing board space and simplifying design by integrating the oscillator, divider, and control logic into a single IC.

Replacement Considerations

Direct replacements include other DS1087LU variants with different frequency/dither codes (e.g., DS1087LU-216). Cross-family alternatives like the DS1089 require verification of pinout and feature compatibility.