DS1087LU-255+

Overview

The DS1087LU-255+T 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, eliminating the need for external timing components. The device operates on a 2.7V to 3.6V supply and features a 2-wire serial interface for user programmability. Key specifications include selectable 2% or 4% dithering, glitchless output enable control, and nonvolatile EEPROM storage for settings. It is housed in an 8-pin µSOP package.

Feature Summary

• Factory programmed square-wave generator covering 130kHz to 66.6MHz
• Spread-spectrum capability with selectable 2% or 4% dithering for EMI reduction
• Nonvolatile EEPROM storage retains settings without external power
• Glitchless output-enable control and dedicated power-down mode

Applications

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

Procurement Notes

Verify the specific frequency and dither percentage associated with the '255' suffix against official documentation, as standard options are explicitly listed (e.g., -216, -266). Confirm current availability status, as this component may be discontinued. Ensure the ordering suffix matches the required voltage range (-40°C to +85°C) and package type (µSOP).

Selection Notes

Select this component when a fixed-frequency, low-component-count clock source is required. Verify that the master oscillator frequency supports the desired output division ratio. Ensure the system design accommodates the 2-wire serial interface requirements if dynamic configuration is needed. Check load capacitance limits to maintain signal integrity at higher frequencies.

Part Context

This part belongs to the DS1087L series of 3.3V Spread-Spectrum EconOscillators manufactured by Analog Devices / Maxim Integrated. The 'LU' designation indicates the commercial temperature range (-40°C to +85°C) and the µSOP package. The '+T' suffix typically denotes tape-and-reel packaging, though verification with the manufacturer is recommended.

Replacement Considerations

Direct replacements within the same series include DS1087LU-216 (16.6MHz, 2%) and DS1087LU-266 (66.6MHz, 2%). If the specific '255' frequency is not a standard option, contact the manufacturer for custom programming services or equivalent cross-reference data.