ICS83023

Integrated Circuit Systems, Inc. ICS932S203 Frequency Generator with 133MHz Differential CPU Clocks Recommended Application: Servers based on Intel CK408 processors Output Features: 4 Differential CPU Clock Pairs @ 3.3V 7 PCI (3.3V) @ 33.3MHz 3 PCI_F (3.3V) @ 33.3MHz 1 USB (3.3V) @ 48MHz 1 DOT (3.3V) @ 48MHz 1 REF (3.3V) @ 14.318MHz 1 3V66 (3.3V) @ 66.6MHz 1 VCH/3V66 (3.3V) @ 48MHz or 66.6MHz 3 66MHz_OUT/3V66 (3.3V) @ 66.6MHz_IN or 66.6MHz 1 66MHz_IN/3V66 (3.3V) @ Input/66MHz Features: Supports spread spectrum modulation, down spread 0 to -0.5%. Efficient power management scheme through PD# and PCI_STOP#. Uses external 14.318MHz crystal Stop clocks and functional control available through SMBus interface. Key Specifications: CPU Output Jitter <150ps 3V66 Output Jitter <250ps CPU Output Skew <150ps Pin Configuration 56-Pin 300mil SSOP/TSSOP * These inputs have 150K internal pull-up resistor to VDD. Block Diagram Functionality CPU (MHz) 100 133.3 100 133.3 Hi-Z Tclk/2 3V66 (MHz) 66.6 66.6 66.6 66.6 Hi-Z Tclk/4 66Buff[2:0] 3V66[4:2] (MHz) 66.6 In path 66. In path 66.6 66.6 Hi-Z Tclk/4 PCI_F PCI (MHz) 66.6 in/2 66.6 in/2 33.3 33.3 Hi-Z Tclk/8 FS1 FS0 1 1 0 0 mid mid 0 1 0 1 0 1 0601E—12/22/04 ICS932S203 Pin Configuration PIN NUMBER 1, 8, 14, 19, 26, 32, 37, 46, 50 2 3 7, 6, 5 4, 9, 15, 20, 27, 31, 36, 41, 47 18, 17, 16, 13, 12,11, 10 23, 22, 21 24 25 PIN NAME VDD X1 X2 PCICLK_F (2:0) GND PCICLK (6:0) 66MHz_OUT (2:0) 3V66 (4:2) 66MHz_IN...