DS1087LU-447+T

Overview

The DS1087LU-447+T is a factory-programmed, spread-spectrum clock generator from the DS1087L series. It produces 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 a 2-wire serial interface for user programmability. Key specifications include a typical active supply current of 5mA at VCC = 3.3V and an operating temperature range of -40°C to +85°C. All settings are stored in nonvolatile EEPROM, allowing standalone operation without external timing components.

Feature Summary

• Factory programmed square-wave generator with frequencies up to 66.6MHz
• Spread-spectrum capability with selectable 2% or 4% dithering for EMI reduction
• Nonvolatile EEPROM storage retains all programming settings
• Glitchless output-enable control via OE pin

Applications

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

Procurement Notes

Verify the specific frequency and dither percentage associated with the '447' suffix against the manufacturer's custom frequency list, as this code does not appear in the standard fixed-frequency options table. Confirm that the T&R suffix indicates tape-and-reel packaging compatible with automated assembly processes.

Selection Notes

Select this component when a precise, factory-set clock frequency is required without external crystals. Ensure the application voltage stays within the 2.7V to 3.6V range. Consider the 2-wire interface requirements if in-circuit reprogramming is needed, or utilize the stand-alone mode by pulling SDA and SCL high if programming is unnecessary.

Part Context

This part belongs to the DS1087L EconOscillator family, designed to replace traditional crystal oscillators. The 'LU' designation typically indicates the commercial temperature grade (-40°C to +85°C) and the µSOP package. The '+T' suffix denotes RoHS compliance and tape-and-reel shipping format.

Replacement Considerations

Direct replacements must match the 8-pin µSOP footprint and 2.7V–3.6V supply range. Other DS1087L variants (e.g., DS1087LU-216) offer different standard frequencies but share identical pinouts and electrical characteristics.