ICS950811 Datasheet, PDF (1/18 Pages) Integrated Circuit Systems – Frequency Generator with 200MHz Differential CPU Clocks

Integrated
Circuit
Systems, Inc.
ICS950811
Frequency Generator with 200MHz Differential CPU Clocks
Recommended Application:
CK-408 clock for Brookdale-Mobile chipsets.
Programmable for group to group skew.
Output Features:
• 3 Differential CPU Clock Pairs (differential current
mode)
• 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
• 5 3V66 (3.3V) @ 66.6MHz
• 1 VCH/3V66 (3.3V) @ 48MHz or 66.6MHz
Features:
• Supports spread spectrum modulation,
down spread 0 to -0.5%.
• Efficient power management scheme through PD#,
CPU_STOP# and PCI_STOP#.
Key Specifications:
• CPU Output Jitter <150ps
• 3V66 Output Jitter <250ps
• 66MHz Output Jitter (Buffered Mode Only) <100ps
• CPU Output Skew <100ps
Pin Configuration
56 pin SSOP/TSSOP
* These inputs have 150K internal pull-up resistor to VDD.
Block Diagram
Functionality
FS2 FS1 FS0
CPU
(MHz)
3V66(1:0)
(MHz)
66MHzOut(2:0)
3V66(4:2)
(MHz)
PCI_F
PCI
(MHz)
0 0 0 66.66 66.66
66.66
33.33
0 0 1 100.00 66.66
66.66
33.33
0 1 0 200.00 66.66
66.66
33.33
0 1 1 133.33 66.66
66.66
33.33
1 0 0 66.66 66.66
1 0 1 100.00 66.66
1 1 0 200.00 66.66
1 1 1 133.33 66.66
Buffered Mode
Not Supported
See ICS950805
Mid 0 0 Tristate Tristate
Tristate
Tristate
Mid 0 1 TCLK/2 TCLK/4
TCLK/4
TCLK/8
Mid 1
0
Reserv-
ed
Reserved
Reserved
Reserved
Mid 1
1
Reserv-
ed
Reserved
Reserved
Reserved
66MHzIn
3V66(5)
(MHz)
66.66
66.66
66.66
66.66
Tristate
TCLK/4
Reserved
Reserved
0482E—08/09/07