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DS1081L - Spread-Spectrum Clock Modulator

General Description

The DS1081L is a spread-spectrum clock modulator IC that reduces EMI in high clock-frequency-based, digital electronic equipment.

Key Features

  • Modulates a 20MHz to 134MHz Clock with Center Spread-Spectrum Dithering.
  • Selectable Spread-Spectrum Modulation Magnitudes of: ±0.5% ±1.0% ±1.5% ±2.0%.
  • Low 75ps Cycle-to-Cycle Jitter.
  • Spread-Spectrum Disable Mode.
  • Pin Compatible with Alliance/PulseCore Semiconductor P2040 Series Devices.
  • Clock Output Disable.
  • Low Cost.
  • Low Power Consumption.
  • 3.3V Single Voltage Supply.
  • -40°C to +125°C Temperature Range.

📥 Download Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Rev 0; 4/07 20MHz to 134MHz Spread-Spectrum Clock Modulator for LCD Panels General Description The DS1081L is a spread-spectrum clock modulator IC that reduces EMI in high clock-frequency-based, digital electronic equipment. Using an integrated phase-locked loop (PLL), the DS1081L accepts an input clock signal in the range of 20MHz to 134MHz and delivers a spread-spectrum modulated output clock signal. The PLL modulates, or dithers, the output clock about the center input frequency at a pin-selectable magnitude and dither rate, allowing direct EMI control and optimization. In addition, through an enable pin the dithering can be enabled or disabled for easy comparison of system performance during EMI testing. This same input pin also allows the DS1081L output to be tri-stated.