Frequency Generator
Integrated Circuit Systems, Inc.
ICS932S203
Frequency Generator with 133MHz Differential CPU Clocks
Recommended Applic...
Description
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...
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