DS1081L Datasheet PDF | Maxim Integrated

Maxim Integrated DS1081L

The DS1081L is a spread-spectrum clock modulator IC that reduces EMI in high clock-frequency-based, digital electronic equipment. 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. This same input pin also allows the DS1081L output to be tri-stated.

Part No.	DS1081L
Datasheet	DS1081L Download
Manufacturer	Maxim Integrated
Description	Spread-Spectrum Clock Modulator
Buy	Stock & Price

GENERAL DESCRIPTION

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. In addition, through an enable pin the dithering can be enabled or disabled for easy comparison of system performance during EMI testing. By dithering the system clock, all the address, data, and timing signals generated from this signal are also dithered so that the measured EMI at the fundamental and harmonic frequencies is greatly reduced. This is accomplished without changing clock rise/fall times or adding the space, weight, design time, and cost associated with mechanical shielding.

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 ♦ C...