DS1087LU-23C+T

Overview

The DS1087LU-23C+T is a 3.3V Spread-Spectrum EconOscillator manufactured by Analog Devices / Maxim Integrated. It generates a dithered square-wave output with frequencies ranging from 130kHz to 66.6MHz. The device operates on a 2.7V to 3.6V supply and features factory-programmed frequency and spread-spectrum settings stored in nonvolatile EEPROM. Key electrical parameters include an active supply current of 5mA (typical) at 3.3V, a standby current of 5µA in power-down mode, and a master oscillator frequency tolerance of ±0.5% at +25°C. It supports selectable 2% or 4% dithering via a 2-wire serial interface.

Feature Summary

• Factory programmed square-wave generator covering 130kHz to 66.6MHz range
• Nonvolatile EEPROM storage for user-programmable settings without external components
• Selectable 2% or 4% peak dither deviation for EMI reduction
• Glitchless output-enable control and programmable power-down mode

Applications

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

Procurement Notes

Verify the specific ordering suffix '+T' indicates tape-and-reel packaging rather than tube, as standard DS1087LU variants often ship in tubes. Confirm availability status, as this component family may be subject to limited supply or end-of-life restrictions. Ensure the 2-wire interface voltage levels match the system's SDA/SCL requirements within the 2.7V to 3.6V operating range.

Selection Notes

Select this component when a low-pin-count, single-output clock source with built-in EMI reduction is required. The DS1087LU-23C provides a fixed factory-set frequency; use the internal prescaler if lower frequencies down to 130kHz are needed. Ensure the application environment stays within the -40°C to +85°C temperature range and that the 2-wire bus timing constraints are met for reliable programming.

Part Context

The DS1087L belongs to the Maxim Integrated EconOscillator family, designed to replace traditional crystal oscillators in space-constrained designs. The 'LU' designation typically refers to the µSOP-8 package variant. This series integrates the oscillator, divider, and EEPROM into a single chip, simplifying PCB layout by eliminating external timing components.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.