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ICS9148-111 Datasheet

  • ICS9148-111

  • Frequency Generator & Integrated Buffers for PENTIUM/ProTM

  • 18頁

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS9148-111
Frequency Generator & Integrated Buffers for PENTIUM/Pro
TM
Recommended Application:
ALI (Aladdin V
聶
) mobile.
Output Features:
鈥?/div>
3 - CPUs @ 2.5V/3.3V, up to 100MHz.
鈥?/div>
3 - AGPCLK @ 3.3V
鈥?/div>
13 - SDRAM @ 3.3V, up to 100MHz.
鈥?/div>
6 - PCI @ 3.3V, including one free running.
鈥?/div>
1 - 48MHz, @ 3.3V fixed.
鈥?/div>
1 - REF @ 3.3V, 14.318MHz.
Features:
鈥?/div>
Up to 100MHz frequency support
鈥?/div>
Support power management: CPU, PCI, AGP stop and,
Power down Mode from I
2
C programming.
鈥?/div>
Spread spectrum for EMI control (0 to -0.6%, 鹵 0.25%).
鈥?/div>
Uses external 14.318MHz crystal
鈥?/div>
FS pins for frequency select
Key Specifications:
鈥?/div>
CPU 鈥?CPU:
<250ps
鈥?/div>
SDRAM - SDRAM:
<250ps
鈥?/div>
AGP-AGP:
<250ps
鈥?/div>
PCI 鈥?PCI:
<500ps
鈥?/div>
CPU-SDRAM <500ps
鈥?/div>
CPU(early)-PCI: 1-4ns, Center 2-6ns
鈥?/div>
CPU-AGP
<500ps
Pin Configuration
48-Pin 300mil SSOP
* Internal Pull-up Resistor of
240K to 3.3V on indicated inputs
Block Diagram
Functionality
CPU,
PCI
AGP
FS2 FS1 FS0 SDRAM (MHz) (MHz)
(MHz)
1
1
1
100
33.33 66.67
1
1
0
95.25
31.75 63.50
1
0
1
83.3
33.30 66.60
1
0
0
75
30.00 60.00
0
1
1
91.5
30.50 61.00
0
1
0
96.22
32.07 64.15
0
0
1
66.8
33.40 66.80
0
0
0
60
30.00 60.00
REF,
IOAPIC
(MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
9148-111 Rev A 10/19/99
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.

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