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PLL702-03OM Datasheet(PDF) 1 Page - PhaseLink Corporation |
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PLL702-03OM Datasheet(HTML) 1 Page - PhaseLink Corporation |
1 / 7 page Preliminary PLL702-03 Low EMI Peripheral Clock Generator for Notebook PCs 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 10/06/02 Page 1 FEATURES • Single Low EMI IC to replace multiple crystals and oscillators on Notebooks and Motherboards (27MHz, 8MHz, 12MHz, 24.576MHz, 25MHz). • Single crystal input: 24.576MHz (accuracy requirement +/- 20ppm) • Less than 10ppm Frequency Synthesis error, meeting AC97, IEEE1394, IEEE802 and USB2.0 frequency precision specification. • 27MHz clock with 5 levels of Selectable Spread Spectrum modulation form +/- 0.5% to +/- 1.5% center. • 25MHz clock with double drive strength (Ethernet PHY and MAC). • 24.576MHz clocks for Audio Codec and IEEE1394. • Selectable 12MHz (USB 2.0) or 8MHz (Keyboard controller). • Dual power source selection for 24.576MHz, 8MHz, and 12MHz. • Available in 16-Pin SOIC or TSSOP. Table 1. SPREAD SPECTRUM SELECTION SST1 SST0 SST Modulation only on 27MHz. (pin 15) 1 1 +/- 1.5 % 1 0 +/- 1.25 % 1 M +/- 1 % 0 1 +/- 0.75 % 0 0 +/- 0.5 % 0 M SST OFF (Default) Notes: M = Do not connect. 1 = Pulled up. 0 = Pulled down. Table 2. POWER SELECTION TABLE VDD_SEL 24.576MHz (pin 7) 12MHz (pin 12) 8MHz (pin 13) 0 VDDB1 VDDB2 1 VDD25M VDD25M PIN ASSIGNMENT POWER GROUPS • VDDOSC –VSSOSC: XIN, XOUT, analog core and digital part. • VDDB1 –VSSB1: 24.576MHz. • VDDB2 –VSSB2: 27MHz, 8MHz, and 12MHz. • VDD25M –VSS25M: 25MHz, (also used for 12MHz, 8MHz when power VDDB2 is not present, and 24.576MHz when power VDDB1 is not present). 1 2 3 4 5 6 7 8 VDDOSC 9 10 11 12 13 14 15 16 XIN XOUT VSSOSC VSSB1 24.576MHz/SST0* T 24.576MHz/SST1* v VDDB1 VDDB2 27MHz VSSB2 8MHz 12MHz/VDD_SEL* v VSS25M 25MHzx2 VDD25M Note: 25MHzx2: double drive strength *: Bi-directional pin v : Internal pull-down resistor (120k Ω) T: Tri-level input |
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