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ICS9248YF-78 PDF预览

ICS9248YF-78

更新时间: 2024-09-25 20:32:43
品牌 Logo 应用领域
艾迪悌 - IDT 时钟光电二极管外围集成电路晶体
页数 文件大小 规格书
13页 604K
描述
Processor Specific Clock Generator, 150MHz, PDSO48, 0.300 INCH, SSOP-48

ICS9248YF-78 技术参数

是否无铅: 含铅是否Rohs认证: 不符合
生命周期:Obsolete零件包装代码:SSOP
包装说明:0.300 INCH, SSOP-48针数:48
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.28
Is Samacsys:N其他特性:CAN ALSO OPERTATE AT 3.3V SUPPLY
JESD-30 代码:R-PDSO-G48JESD-609代码:e0
长度:15.875 mm端子数量:48
最高工作温度:70 °C最低工作温度:
最大输出时钟频率:150 MHz封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, SHRINK PITCH峰值回流温度(摄氏度):225
主时钟/晶体标称频率:14.318 MHz认证状态:Not Qualified
座面最大高度:2.794 mm最大供电电压:2.625 V
最小供电电压:2.375 V标称供电电压:2.5 V
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子面层:TIN LEAD
端子形式:GULL WING端子节距:0.635 mm
端子位置:DUAL处于峰值回流温度下的最长时间:30
宽度:7.5 mmuPs/uCs/外围集成电路类型:CLOCK GENERATOR, PROCESSOR SPECIFIC
Base Number Matches:1

ICS9248YF-78 数据手册

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ICS9248-78  
Integrated  
Circuit  
Systems, Inc.  
Preliminary Product Preview  
Frequency Timing Generator for Pentium II Systems  
General Description  
The ICS9248-78 is a single chip clock for Intel Pentium II.  
Features  
•
Generates the following system clocks:  
- 2 - CPUs @ 2.5V, up to 150MHz.  
-1-IOAPIC@2.5V, PCI/2MHz.  
- 9SDRAMs(3.3V), upto150MHz.  
-2-3V66@3.3V,2xPCIMHz.  
-8-PCIs@3.3V.  
-1-48MHz, @3.3Vfixed.  
It provides all necessary clock signals for such a system.  
Spread spectrum may be enabled through I2C programming.  
Spread spectrum typically reduces EMI by 8dB to 10 dB.  
This simplifies EMI qualification without resorting to board  
design iterations or costly shielding. The ICS9248-78  
employs a proprietary closed loop design, which tightly  
controls the percentage of spreading over process and  
temperature variations.  
-2-REF@3.3V,14.318Hz.  
-1-24MHz, @3.3Vfixed.  
•
Supports spread spectrum modulation ,  
down spread 0 to -0.5%, ±0.25% center spread.  
I2C support for power management.  
Efficient power management scheme through PD#.  
Uses external 14.138 MHz crystal.  
•
•
•
Block Diagram  
Pin Configuration  
48-Pin 300 mil SSOP  
1. These pins will have 2X drive strength.  
* 120K ohm pull-up to VDD on indicated inputs.  
Power Groups  
GNDREF,VDDREF=REF,Crystal  
GND3V66,VDD3V66=3V66  
GNDPCI,VDDPCI=PCICLKs  
GNDCOR,VDDCOR=PLLCORE  
GND48,VDD48=48  
GNDSDR,VDDSDR=SDRAM  
GNDLCPU,VDDLCPU=CPUCLK  
GNDLPCI,VDDLAPIC=IOAPIC  
Pentium II is a trademark of Intel Corporation  
I2C is a trademark of Philips Corporation  
PRODUCT PREVIEW documents contain information on new  
products in the sampling or preproduction phase of development.  
Characteristic data and other specifications are subject to change  
without notice.  
9248-78RevA7/21/99  

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