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ICS9248YF-78LF PDF预览

ICS9248YF-78LF

更新时间: 2024-09-25 14:51:23
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-78LF 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SSOP
包装说明:SSOP,针数:48
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.28
其他特性:CAN ALSO OPERTATE AT 3.3V SUPPLYJESD-30 代码:R-PDSO-G48
JESD-609代码:e3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):260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:MATTE TIN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 mm
uPs/uCs/外围集成电路类型:CLOCK GENERATOR, PROCESSOR SPECIFICBase Number Matches:1

ICS9248YF-78LF 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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