DS1091LUB-033+

Clock Generators, PLLs, Frequency Synthesizers Overview

The DS1091LUB-033+ is a factory-trimmed, automotive-grade spread-spectrum clock generator operating from 3.0V to 3.6V. It provides a single output at 33.3MHz with ±0.25% nominal accuracy at 25°C and ±1.75% across the -40°C to +125°C temperature range. The device features down-dithered spread-spectrum output with pin-selectable magnitudes of 0%, -2%, -4%, or -8%. Packaged in an 8-pin µMAX, it includes pin-selectable dither rates and requires decoupling capacitors for optimal performance.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Down-dithered spread-spectrum output at 33.3MHz
• Pin-selectable dither magnitude: 0%, -2%, -4%, or -8%
• Automotive temperature range (-40°C to +125°C)
• ±1.75% frequency accuracy across voltage and temperature

Clock Generators, PLLs, Frequency Synthesizers Applications

• Automotive Infotainment
• POS Terminals
• LCD Displays
• Printers
• Industrial Control

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, lead finish status, and tape-and-reel availability. Confirm that the component meets RoHS compliance requirements as indicated by the '+' suffix in the part number.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a fixed 33.3MHz output with down-dithering is required. Ensure the application supports the 3.0V to 3.6V supply range. Verify that the 8-pin µMAX package dimensions fit the PCB layout constraints and that the thermal dissipation limits are respected within the operating environment.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the DS1091L EconOscillator family, designed to replace traditional crystals and resonators. The 'UB' designation specifically indicates a down-dithered output profile, distinguishing it from center-dithered variants like the DS1091LUA series.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

DS1091LUA-033+ (Center-dithered variant)

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the difference between DS1091LUA and DS1091LUB?

The DS1091LUA provides center-dithered output, while the DS1091LUB provides down-dithered output. The Dither Magnitude table specifies different selectable percentages for each variant.

How is the dither rate determined?

The dither rate is a function of the output frequency and the logic level on the DR pin. The value of 'n' in the rate equation depends on the output frequency range as defined in Table 2 of the datasheet.

What are the recommended decoupling capacitors?

Typical values of 0.01µF and 0.1µF high-quality ceramic surface-mount capacitors are recommended, mounted as close as possible to the VCC and GND pins.