DS1091LUA-172/V+T

Clock Generators, PLLs, Frequency Synthesizers Overview

The DS1091LUA-172/V+T is an automotive-grade spread-spectrum clock generator from the EconOscillator family. It provides a single center-dithered output at a factory-trimmed frequency of 1.7 MHz with ±0.25% nominal accuracy. The device operates on a 3.0V to 3.6V supply and supports dither magnitudes of 0%, ±1%, ±2%, or ±4% via SEL0/SEL1 pins, alongside two selectable dither rates controlled by the DR pin. Packaged in an 8-pin µMAX format, it functions reliably across the -40°C to +125°C temperature range.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Center-dithered spread-spectrum output at 1.7 MHz
• Automotive qualification (-40°C to +125°C)
• Pin-selectable dither magnitude (0%, ±1%, ±2%, ±4%)
• Factory trimmed for ±0.25% initial accuracy

Clock Generators, PLLs, Frequency Synthesizers Applications

• Automotive infotainment systems
• Industrial control units
• LCD displays
• POS terminals

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the 'V' suffix confirms automotive grade qualification and the 'T' suffix indicates tape-and-reel packaging. Confirm the '172' code corresponds to the specific 1.7 MHz frequency setting required for the design. Check current availability status as automotive components may have restricted supply chains.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed 1.7 MHz center-dithered clock is needed for automotive applications. Ensure SEL0 and SEL1 pins are configured correctly for the desired dither percentage. Verify that the load capacitance requirements align with the system's input impedance to maintain frequency accuracy.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the DS1091L series of low-cost, factory-programmable oscillators. The 'U' designation specifies the center-dither variant, distinguishing it from the down-dither LUB models. It replaces older discrete oscillator solutions in space-constrained PCB layouts requiring spread-spectrum capabilities.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other DS1091LUA variants with different frequencies. For non-automotive use, standard commercial grade parts without the '/V' suffix may be considered if temperature constraints allow.