CY28322-2

PRELIMINARY CY28322-2 133-MHz Spread Spectrum Clock Synthesizer with Differential CPU Outputs Features Compliant with Intel CK-Titan and CK-408 clock synthesizer/driver specifications Multiple output clocks at different frequencies — Two pairs of differential CPU outputs, up to 200 MHz — Nine synchronous PCI clocks, three free-running — Six 3V66 clocks — Two 48-MHz clocks — One reference clock at 14.318 MHz — One VCH clock Spread Spectrum clocking (down spread) Power-down features (PCI_STOP#, CPU_STOP# PWR_DWN#) 48-pin TSSOP package Enables reduction of EMI and overall system cost Enables ACPI-compliant designs  Benefits Supports next generation Pentium processors using differential clock drivers Motherboard clock generator — Support multiple CPUs and a chipset — Support for PCI slots and chipset — Supports AGP, DRCG reference, and Hub Link — Supports USB host and graphic controllers — Supports ISA slots and I/O chip Two select inputs (Mode select & IC Frequency Select) Supports up to four CPU clock frequencies Widely available, standard package enables lower cost Logic Block Diagram VDD_REF PWR Pin Configurations TSSOP Top View XTAL_IN XTAL_OUT GND_REF PCI_F0 PCI_F1 Stop Clock Control X1 X2 XTAL OSC 1 2 3 4 5 6 7 8 9 10 48 47 46 45 44 43 42 41 40 39 VDD_REF REF0 S1 CPU_STOP# VDD_CPU CPU1 CPU#1 GND_CPU VDD_CPU CPU2 CPU#2 IREF S2 USB DOT VDD_48 MHz GND_48 MHz 3V66_1/VCH PCI_STOP# 3V66_0 VDD_3V66 GND_3V66 SCLK SDATA REF PLL Ref Freq PLL 1 S1:2 PWR_GD#...