SY89529L

Micrel, Inc. 3.3V 200MHz PRECISION SPREADSPECTRUM CLOCK SYNTHESIZER Precision Edge SY89529L Precision Edge® SY89529L ® FEATURES s Low voltage, 3.3V power supply operation s 200MHz precision LVPECL output from a low cost 16.66MHz crystal s 0.5% spread-spectrum modulation control s > 7dB reduction in EMI with spread-spectrum modulation s LVTTL/LVCMOS compatible control inputs s interfaces directly to a crystal s Precision PLL architecture ensures < 30ps peak-to-peak, cycle-to-cycle output jitter s 48%-to-52% precision duty cycle is ideal for doubledata-rate clocking applications s Available in low cost 32-pin TQFP and 28-pin SOIC packages DESCRIPTION The SY89529L is a high-speed, precision PLL-based LVPECL clock synthesizer with spread-spectrum modulation control. With an external 16.66MHz crystal providing a reference frequency to the internal PLL, the differential PECL output frequency will be 200MHz with < 30ps (20ps typ.) peak-to-peak, cycle-to-cycle output jitter. The SY89529L spread-spectrum mode operates with a 30kHz triangle modulation with 0.5% down-spread (+0.0%/ –0.5%). When spread-spectrum is activated, the output signal is modulated which spreads the peak amplitudes and, thus, decreases EMI (Electro-Magnetic Interference). APPLICATIONS s s s s High-speed synchronous systems CPU clock Multi-processor workstations and servers Networking www.DataSheet4U.com M9999-110405 [email protected] or (408) 955-1690 Rev.: E Amendment: /0 1 Issue Date: October 2005 ...