DS1089LU-22F+

Clock Generators, PLLs, Frequency Synthesizers Overview

The DS1089LU-22F+ is a factory-programmed clock generator from the EconOscillator family, designed to produce a spread-spectrum square-wave output. It operates at a fixed center frequency of 24.576 MHz with ±1% dithering enabled by default. The device functions within a supply voltage range of 2.7V to 3.6V and supports an operating temperature range of -40°C to +85°C. It features an I²C-compatible serial interface for user programmability of the prescaler divider, dither percentage, and dither rate. All settings are stored in nonvolatile EEPROM, allowing standalone operation without external timing components.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Factory-programmed 24.576 MHz center frequency with ±1% symmetric dither
• I²C-compatible serial interface for programmable prescaler (down to 130kHz) and dither settings
• Nonvolatile EEPROM storage retains configuration after power loss
• Glitchless output enable and power-down control pins for low-power applications

Clock Generators, PLLs, Frequency Synthesizers Applications

• Printers
• Copiers
• Computer Peripherals
• POS Terminals
• Cable Modems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via the specific datasheet revision. Note that ordering suffixes such as /T indicate tape-and-reel packaging variations; ensure the selected package matches assembly requirements. Check current lifecycle status as availability may vary.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a fixed 24.576 MHz clock with EMI reduction is required. Ensure the application utilizes a 3.3V logic level compatible with the 2.7V–3.6V supply range. Verify that the 8-pin µSOP package fits the PCB footprint. If frequencies outside the standard options are needed, contact the factory for custom programming.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The DS1089LU-22F+ belongs to the DS1089L series of 3.3V Center Spread-Spectrum EconOscillators. It is pin-for-pin compatible with the DS1087L but provides bidirectional dithering around the center frequency. The 'LU' designation indicates the specific frequency and dither configuration, while the '+' suffix denotes RoHS compliance.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The DS1089L is pin-for-pin compatible with the DS1087L. However, verify that the replacement part supports the required bidirectional dithering characteristics if EMI reduction is critical. Custom frequency variants require direct factory consultation.