DS1087LU-450+

Overview

The DS1087LU-450+ is a factory-programmed spread-spectrum clock generator producing square-wave outputs 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 2-wire serial interface for user programmability of the internal frequency divider and selectable 2% or 4% dithered output. It incorporates glitchless output-enable control and power-down modes to support power-sensitive applications.

Feature Summary

• Factory programmed square-wave generator with frequencies up to 66.6MHz
• Spread-spectrum capability with 2% or 4% selectable dither for EMI reduction
• Nonvolatile EEPROM stores settings for standalone operation
• Glitchless output enable and power-down control via dedicated pins

Applications

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

Procurement Notes

Verify the specific frequency and dither percentage associated with the '450' suffix against official documentation, as this code denotes a custom factory setting rather than a standard option. Confirm package availability in 8-pin µSOP format. Check current lifecycle status, as many variants in this series are discontinued.

Selection Notes

Select this component when a fixed-frequency, spread-spectrum clock source is required to minimize electromagnetic interference. Ensure the application voltage remains within the 2.7V to 3.6V range. Verify that the 2-wire serial interface is compatible with the system controller if dynamic reconfiguration is needed.

Part Context

The DS1087LU-450+ belongs to the DS1087L EconOscillator family from Analog Devices/Maxim Integrated. This series provides low-cost, single-output clock generators designed to replace crystal oscillators while offering spread-spectrum benefits. The 'LU' designation indicates the industrial temperature range (-40°C to +85°C) and µSOP packaging.

Replacement Considerations

Standard replacements include DS1087LU-2xx (2% dither) or DS1087LU-4xx (4% dither) variants for common frequencies like 16.6MHz or 66.6MHz. For custom frequencies, contact the manufacturer directly as the '450' suffix represents a specific factory program.