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ICS9250YF-19 Datasheet

  • ICS9250YF-19

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

  • 15頁

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS9250-19
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: 1 - 4ns
鈥?/div>
PCI 鈥?PCI: <500ps
鈥?/div>
SDRAM - SDRAM: <250ps
Pin Configuration
56-Pin SSOP
Block Diagram
* Internal Pull-up Resistor of 240K to 3.3V on indicated inputs
** Internal Pull-down resistor of 240K to GND on indicated inputs.
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
100.0
133
112
103
66.6
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)
9250-19 Rev C 4/12/01
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.

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