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参数资料
| 型号： | 9248YF-65 |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | SSOP-48 |
| 文件页数： | 1/10页 |
| 文件大小： | 264K |
| 代理商： | 9248YF-65 |
Integrated
Circuit
Systems, Inc.
ICS9248-65
Third party brands and names are the property of their respective owners.
Block Diagram
Frequency Timing Generator for PENTIUM IISystems
9248-65 Rev C 7/28/99
Pin Configuration
48-pin SSOP
Generates the following system clocks:
-3 CPUclocks(2.5V,100/133MHz)
- 10 PCI clocks, including 1 free-running
(3.3V, 33.3MHz)
-1CPU/2clocks(2.5V,50/66.6MHz)
-1IOAPICclocks(2.5V,16.67MHz)
- 3 Fixed frequency 66MHz clocks(3.3V, 66.6MHz)
- 2REFclocks(3.3V,14.318MHz)
- 1USBclock(3.3V,48MHz)
Efficient power management through PD#.
0 to -0.5% typical down spread modulation on CPU, PCI,
IOAPIC, 3V66 and CPU/2 output clocks.
Usesexternal14.318MHzcrystal.
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.
Features
Key Specification
CPU Output Jitter: <250ps
CPU/2 Output Jitter. <250ps
IOAPIC Output Jitter: <500ps
48MHz, 3V66, PCI Output Jitter: <500ps
PCI Output Jitter. <500ps
Ref Output Jitter. <1000ps
CPU 0:2 Output Skew: <175ps
PCI_F, PCI 1:7 Output Skew: <500ps
3V66_0:2 Output Skew <250ps
CPU to 3V66_0:2 Output Offset: 0.0 - 1.5ns (CPU leads)
3V66 to PCI Output Offset: 1.5 - 4ns (CPU leads)
CPU to IOAPIC Output Offset 1.5 - 4.0ns (CPU leads)
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