DS1086LU-21D+

Overview

The DS1086LU-21D+ is a 3.3V programmable clock generator from the DS1086L family, housed in an 8-pin µSOP package. It generates spread-spectrum square-wave outputs ranging from 130kHz to 66.6MHz. The device features selectable dither magnitudes 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 controls include power-down mode and glitchless output enable via dedicated pins.

Feature Summary

• Programmable frequency range from 130kHz to 66.6MHz with 5kHz master frequency step size
• Selectable spread-spectrum dither levels: 0.5%, 1%, 2%, 4%, or 8%
• Nonvolatile EEPROM storage for settings, enabling standalone operation without external programming
• Glitchless output-enable control and power-down mode for power-sensitive applications

Applications

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

Procurement Notes

Verify the specific suffix '21D+' against official manufacturer documentation to confirm pinout, temperature range, and compliance status. Suffixes often denote specific factory trim values or packaging variations that affect electrical characteristics. Ensure the source document explicitly defines this variant's parameters before integration.

Selection Notes

Select this component when EMI reduction is critical for low-frequency clock signals up to 66.6MHz. The internal oscillator eliminates the need for external timing components. Verify that the required dither rate and magnitude align with the available prescaler and jitter register settings. Ensure the system voltage remains within the 2.7V to 3.6V operating range.

Part Context

This part belongs to the Maxim Integrated (now Analog Devices) DS1086L EconOscillator series. These devices are designed as direct replacements for crystal oscillators in systems requiring spread-spectrum clocking. The µSOP package provides a compact footprint suitable for dense PCB layouts in consumer electronics and computer peripherals.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing, ensure the new device supports the same 2-wire serial interface protocol and voltage levels. Verify that the replacement offers compatible dither capabilities and fits the existing 8-pin µSOP footprint.