DS1086LU-455+T

Overview

The DS1086LU-455+T is a 3.3V programmable clock generator from the DS1086L series, manufactured by Analog Devices/Maxim Integrated. It produces spread-spectrum square-wave outputs ranging from 130kHz to 66.6MHz. The device features selectable dithering of 0.5%, 1%, 2%, 4%, or 8% to reduce radiated emissions. It operates on a 2.7V to 3.6V supply and includes nonvolatile EEPROM memory for standalone configuration. Key electrical parameters include a master oscillator frequency range of 33.3MHz to 66.6MHz, a default factory frequency of 48.65MHz with ±0.5% tolerance at 25°C, and a 5kHz DAC step size. The unit is housed in an 8-pin μSOP package.

Feature Summary

• Programmable output frequencies from 130kHz to 66.6MHz using internal master oscillator and prescaler
• Selectable spread-spectrum dither levels (0.5%, 1%, 2%, 4%, 8%) controlled via SPRD pin or registers
• Nonvolatile EEPROM storage retains settings without external power
• Glitchless output enable and power-down modes for power-sensitive applications

Applications

• Printers and copiers
• PCs and computer peripherals
• Cell phones and cable modems

Procurement Notes

Verify the specific suffix '455' against official documentation, as standard listings typically use 'LU+' or 'LU-T'. Confirm availability status, as many DS1086 variants are marked as obsolete or end-of-life. Ensure the ordering code matches the required temperature range (-40°C to +85°C) and package type (μSOP).

Selection Notes

Select this component when EMI reduction is critical through spread-spectrum modulation. The device requires a 2-wire serial interface for programming unless SDA/SCL are tied high for fixed factory settings. Ensure the target frequency falls within the valid OFFSET ranges defined in the datasheet tables to guarantee correct operation.

Part Context

This part belongs to the DS1086L EconOscillator family, which integrates a voltage-controlled oscillator and prescaler into a single chip. Unlike discrete crystal solutions, it eliminates external timing components. The 'LU' designation indicates the industrial temperature grade and μSOP packaging.

Replacement Considerations

Direct replacements within the same footprint and function include other DS1086L variants such as DS1086LU+ or DS1086LU-834+T. Verify that substitute parts support the required output frequency and dither specifications.