PLL702-02

Low EMI Peripheral Clock Generator for Notebook & Motherboards FEATURES w w w Single Low EMI IC to replace multiple crystals and oscillators on Notebooks and Motherboards (27MHz, 10MHz, 14.318MHz, 8MHz, 12MHz, 24.576MHz, 25MHz). Selectable crystal input: 24.576MHz or 14.318MHz (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. 12MHz for USB 2.0. Selectable 10MHz and 8MHz for Keyboard controller. Dual power source selection for 24.576MHz, 10MHz, and 12MHz. Available in 16-Pin SOIC or TSSOP. .D at h S a t e e 4U . m o c Preliminary PLL702-02 PIN ASSIGNMENT VDDOSC XIN XOUT VSSOSC VSSB1 24.576MHz/SST0* T 24.576MHz/SST1*v VDDB1 1 2 16 15 VDDB2 27_14.318MHz/XTAL_SEL* v VSSB2 10_8MHz/SEL10_8* T 12MHz/VDD_SEL* v VSS25M 25MHzx2 VDD25M *: Bi-directional pin Tri-level input PLL 702-02 3 4 5 6 7 14 13 12 11 10 Note: 25MHzx2: double drive strength v: Internal pull-down resistor (120k Ω) Table 1. SPREAD SPECTRUM SELECTION SST1 1 1 1 0 0 0 SST0 1 0 M 1 0 M SST Modulation only on 27MHz. (pin 15) +/- 1.5 % +/- 1 % +/- 1.25 % Notes: M = Do not connect. 1 = Pulled up. 0 = Pulled down. w w SST OFF (Default) w +/- 0.75 % +/- 0.5 % .D 12MHz...