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PLL701-31SIR Datasheet(PDF) 1 Page - PhaseLink Corporation |
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PLL701-31SIR Datasheet(HTML) 1 Page - PhaseLink Corporation |
1 / 5 page PLL701-31 Low EMI Spread Spectrum Multiplier Clock 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 11/28/05 Page 1 FEATURE • Spread Spectrum Clock Generator with 1x outputs. • Output frequency ranges: 10MHz to 30MHz. • Accepts input from crystal or reference clock. • Selectable Center, Down or Asymmetric Spread Modulation. • Selectable Modulation magnitude. • TTL/CMOS compatible outputs. • 3.0V (+/-10%) Supply Voltage. • Low short-term jitter. • Available in 8-Pin 150mil SOIC. DESCRIPTION The PLL701-31 is a Spread Spectrum Clock Generator designed to reduce EMI in high-speed digital systems. The device is designed to operate from a crystal or reference clock input and provides a 1x modulated clock output. Center, Down and Asymmetric spread types are selectable as well as the modulation magnitude. PIN CONFIGURATION Note: ^: Internal pull-up resistor (120k Ω for SD, 30 kΩ for SC0-SC2). *: The value of SD is latched upon power-up. The internal pull-up resistor results in a default high value when no pull-down resistor is connected to this pin (recommended external pull-down resistor of 27 k Ω). OUTPUT CLOCK SELECTION SST Modulation SD SC2 SC1 SC0 Magnitude Freq. Type 0 1 1 0 3.75% D -3.75% 1 0 0 1 3.50% D -3.50% 1 0 1 0 3.75% A +0.125%, -3.625% 1 1 0 0 3.25% D -3.25% 1 1 0 1 3.50% A +0.125%, -3.375% 1 1 1 0 3.75% A +0.25%, -3.5% 0 0 0 0 3.25% C +/-1.625 % 0 0 0 1 3.50% C +/-1.75% 0 0 1 0 3.75% C +/-1.875% 0 0 1 1 0.00% Fin / 512 SST OFF Notes: A: Asymmetric Spread. D: Down Spread. C: Center Spread. 1 2 3 45 6 7 8 XIN/FIN XOUT/SD*^ SC0^ SC1^ VDD FOUT GND SC2^ XIN/FIN = 10 ~ 30 MHz |
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