ICS950810 Datasheet, PDF (1/19 Pages) Integrated Circuit Systems – Frequency Generator with 200MHz Differential CPU Clocks

Integrated
Circuit
Systems, Inc.
ICS950810
Frequency Generator with 200MHz Differential CPU Clocks
Recommended Application:
CK-408 clock for BANIAS processor/ ODEM and
MONTARA-G chipsets.
Output Features:
• 3 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
• 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%. (CPU, 3V66, PCI)
• Efficient power management scheme through PD#,
CPU_STOP# and PCI_STOP#.
Key Specifications:
• CPU Output Jitter <150ps
• 3V66 Output Jitter <250ps
• CPU Output Skew <100ps
Pin Configuration
VDDREF 1
X1 2
X2 3
GND 4
PCICLK_F0 5
PCICLK_F1 6
PCICLK_F2 7
VDDPCI 8
GND 9
PCICLK0 10
PCICLK1 11
PCICLK2 12
PCICLK3 13
VDDPCI 14
GND 15
PCICLK4 16
PCICLK5 17
PCICLK6 18
VDD3V66 19
GND 20
3V66_2 21
3V66_3 22
3V66_4 23
3V66_5 24
*PD# 25
VDDA 26
GND 27
Vtt_PWRGD# 28
56 REF
55 FS1
54 FS0
53 CPU_STOP#*
52 CPUCLKT0
51 CPUCLKC0
50 VDDCPU
49 CPUCLKT1
48 CPUCLKC1
47 GND
46 VDDCPU
45 CPUCLKT2
44 CPUCLKC2
43 MULTSEL0*
42 IREF
41 GND
40 FS2
39 48MHz_USB
38 48MHz_DOT
37 VDD48
36 GND
35 3V66_1/VCH_CLK
34 PCI_STOP#*
33 3V66_0
32 VDD3V66
31 GND
30 SCLK
29 SDATA
56-Pin 300mil SSOP
6.10 mm. Body, 0.50 mm. pitch TSSOP
* These inputs have 150K internal pull-up resistor to VDD.
Block Diagram
Functionality
PLL2
X1
XTAL
X2
OSC
PLL1
Spread
Spectrum
PD#
CPU_STOP#
PCI_STOP#
MULTSEL0
FS (2:0)
SDATA
SCLK
Control
Logic
Config.
Reg.
CPU
DIVDER
Stop
PCI
DIVDER
Stop
3V66
DIVDER
48MHz_USB
48MHz_DOT
3V66_5
3V66_3
3V66_(4,2)
REF
3 ^{CPUCLKT (2:0)}
3 ^{CPUCLKC (2:0)}
PCICLK (6:0)
7
PCICLK_F (2:0)
3
3V66_0
3V66_1/VCH_CLK
I REF
FS2 FS1 FS0
CPU
(MHz)
X00
X0 1
X 10
X 11
Mid 0 0
Mid 0 1
Mid 1 0
Mid 1 1
166.66
100.00
200.00
133.33
Tristate
TCLK/2
Reserved
Reserved
3V66(5:0)
(MHz)
66.66
66.66
66.66
66.66
Tristate
TCLK/4
Reserved
Reserved
PCI_F
PCI
(MHz)
33.33
33.33
33.33
33.33
Tristate
TCLK/8
Reserved
Reserved
0472F—01/12/04