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SM8702AM

更新时间: 2024-01-17 17:56:32
品牌 Logo 应用领域
NPC 时钟发生器微控制器和处理器光电二极管
页数 文件大小 规格书
16页 156K
描述
Clock Generator IC

SM8702AM 技术参数

是否Rohs认证:不符合生命周期:Transferred
包装说明:SSOP, SSOP48,.4Reach Compliance Code:unknown
风险等级:5.88Is Samacsys:N
JESD-30 代码:R-PDSO-G48JESD-609代码:e0
端子数量:48最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装等效代码:SSOP48,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
电源:2.5,3.3 V认证状态:Not Qualified
子类别:Clock Generators最大压摆率:180 mA
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:0.635 mm
端子位置:DUALBase Number Matches:1

SM8702AM 数据手册

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SM8702AM  
Clock Generator IC  
NIPPON PRECISION CIRCUITS INC.  
OVERVIEW  
The SM8702AM is a clock generator IC that can generate clock signals up to and exceeding 100MHz for per-  
sonal computer (PC) motherboards. It uses a single 14.318MHz crystal oscillator element and 2 built-in PLLs  
to simultaneously and independently generate 2 CPU clocks, 6 PCI bus clocks, 2 reference clocks with the  
same frequency as the crystal element, 48MHz USB interface clock, and 24MHz Super I/O chip clock outputs.  
It also has 14 outputs that can function as SDRAM clocks by buffering an external input SDRAM clock.  
FEATURES  
PINOUT  
Intel Pentium II, Pentium III, and AMD x86-  
compatibles supported  
2.5/3.3V CPU clock outputs and IOAPIC clock  
output  
48-pin SSOP (300 mil)  
(Top view)  
14 × SDRAM clock outputs (3 DIMMs)  
2 × CPU clock outputs  
1
48  
VDD1  
VDDL1  
IOAPIC  
REF1/FS2  
VSS  
REF0  
(60), 66, 75, 83, 95, 100, 103, 112, (124), 133MHz  
CPU/SDRAM clock frequencies. Values in paren-  
theses are available as mask options.  
6 × PCI bus clock outputs (one free-running out-  
put)  
33MHz or 1/2, 1/3, 1/4 of the CPU clock fre-  
quency  
2 × reference clock outputs and 1 × IOAPIC clock  
output  
VSS  
XT  
XTN  
CPUCLK0  
CPUCLK1  
VDDL2  
SDRAM13  
SDRAM12  
VSS  
VDD2  
PCICLK_F/MODE  
PCICLK0  
VSS  
PCICLK1  
PCICLK2  
PCICLK3  
PCICLK4  
VDD2  
SDRAM0  
SDRAM1  
VDD3  
SDRAM2  
SDRAM3  
VSS  
14.318MHz REF/IOAPIC clock frequency  
1 × 48MHz USB interface clock output  
1 × 24MHz clock output for Super I/O chip  
BUFFERIN  
VSS  
SDRAM11/CPU_STOP#  
SDRAM10/PCI_STOP#  
VDD3  
SDRAM4  
SDRAM5  
VDD3  
2
I C serial data bus for frequency/mode output con-  
trol  
SDRAM9  
SDRAM8  
VSS  
SDRAM6  
SDRAM7  
VDD4  
CPU-stop and PCI-stop functions  
Spread Spectrum Clock Generator (SSCG) out-  
puts  
48MHz/FS0  
24MHz/FS1  
SDATA  
24  
25  
SCLK  
Center spread/Down spread, ± 0.5% or ± 1.5%  
3.3V (VDD) and 2.5/3.3V (VDDL) supply volt-  
ages  
48-pin SSOP package (pin compatible with  
ICS9148-26)  
ORDERING INFORMATION  
De vice  
Packag e  
48-pin SSOP  
APPLICATIONS  
SM8702AM  
PC motherboards using Intel Pentium , Pen-  
tium II/III, AMD-K6 devices, and x86 architec-  
ture CPUs  
Intel and Pentium are registered trademarks of Intel co..  
AMD and AMD-K6 are registered trademarks of Advanced Micro Devices, Inc..  
2
I C Bus is a registered trademark of Philips Electronics N. V..  
NIPPON PRECISION CIRCUITS—1  

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