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ICS9250YF-08 Datasheet

  • ICS9250YF-08

  • Frequency Generator & Integrated Buffers for Celeron & PII/I...

  • 15頁

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS9250-08
Frequency Generator & Integrated Buffers for Celeron & PII/III鈩?/div>
Recommended Application:
BX, Appollo Pro 133 type of chip set.
Output Features:
鈥?/div>
3 - CPUs @2.5V, up to 150MHz.
鈥?/div>
17 - SDRAM @ 3.3V, up to 150MHz.
鈥?/div>
7 - PCI @3.3V
鈥?/div>
2 - IOAPIC @ 2.5V
鈥?/div>
1 - 48MHz, @3.3V fixed.
鈥?/div>
1 - 24MHz @ 3.3V
鈥?/div>
2 - REF @3.3V, 14.318MHz.
Features:
鈥?/div>
Up to 150MHz frequency support
鈥?/div>
Support power management: CPU, PCI, stop and Power
down Mode form I
2
C programming.
鈥?/div>
Spread spectrum for EMI control (0 to -0.5%, 鹵 0.25%).
鈥?/div>
Uses external 14.318MHz crystal
Key Specifications:
鈥?/div>
CPU 鈥?CPU: <175ps
鈥?/div>
CPU 鈥?PCI: min = 1ns max = 4ns
鈥?/div>
PCI 鈥?PCI: <250ps
鈥?/div>
SDRAM - SDRAM: <500ps
Pin Configuration
VDDREF
*FS2/REF1
*PCI_STOP/REF0
GND
X1
X2
VDDPCI
*MODE/PCICLK_F
**FS3/PCICLK0
GND
PCICLK1
PCICLK2
PCICLK3
PCICLK4
VDDPCI
PCICLK5
BUFFERIN
SDRAM11
SDRAM10
VDDSDR
SDRAM9
SDRAM8
GND
SDRAM15
SDRAM14
GND
SDATA
2
I C
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
VDDLIOAPIC
IOAPIC0
IOAPIC_F
GND
CPUCLK_F
CPUCLK1
VDDLCPU
CPUCLK2
GND
CPU_STOP#
SDRAM_F
VDDSDR
SDRAM0
SDRAM1
GND
SDRAM2
SDRAM3
SDRAM4
SDRAM5
VDDSDR
SDRAM6
SDRAM7
GND
SDRAM12
SDRAM13
VDD48
24MHz/FS0*
48MHz/FS1*
{
56-Pin SSOP
Block Diagram
PLL2
梅2
* Internal Pull-up Resistor of 240K to 3.3V on indicated inputs
** Internal Pull-down resistor of 240K to GND on indicated inputs.
48MHz
24MHz
IOAPIC_F
Functionality
FS3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
FS2
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
FS1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
FS0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
CPU
(MHz)
133
124
150
140
105
110
115
120
100.3
133
112
103
66.8
83.3
75
124
PCICLK (MHz)
33.3 (CPU/4)
31 (CPU/4)
37.5 (CPU/4)
35 (CPU/4)
35 (CPU/3)
36.67 (CPU/3)
38.33 (CPU/3)
40.00 (CPU/3)
33.43 (CPU/3)
44.33 (CPU/3)
37.33 (CPU/3)
34.33 (CPU/2)
33.40 (CPU/2)
41.65 (CPU/2)
37.5 (CPU/2)
41.33 (CPU/2)
X1
X2
XTAL
OSC
STOP
IOAPIC0
2
REF [1:0]
CPUCLK_F
CPUCLK [2:1]
PLL1
Spread
Spectrum
FS[3:0]
MODE
POR
LATCH
1
STOP
2
4
PCI
CLOCK
DIVDER
STOP
6
PCICLK [5:0]
PCICLK_F
CPU_STOP#
PCI_STOP#
2
Control
Logic
Config.
Reg.
STOP
I C
SCLK
{
SDATA
16
SDRAM [15:0]
SDRAM_F
BUFFERIN
9250-08 Rev H 10/8/99
Third party brands and names are the property of their respective owners.
ICS reserves the right to make changes in the device data identified in
this publication without further notice. ICS advises its customers to
obtain the latest version of all device data to verify that any
information being relied upon by the customer is current and accurate.
ICS9250-08

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