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C9840AY PDF预览

C9840AY

更新时间: 2024-02-09 15:23:06
品牌 Logo 应用领域
赛普拉斯 - CYPRESS 光电二极管外围集成电路
页数 文件大小 规格书
17页 183K
描述
Processor Specific Clock Generator, CMOS, PDSO48, SSOP-48

C9840AY 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SSOP包装说明:SSOP-48
针数:48Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.92JESD-30 代码:R-PDSO-G48
JESD-609代码:e0长度:15.875 mm
端子数量:48最高工作温度:85 °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
峰值回流温度(摄氏度):NOT SPECIFIED电源:2.5,3.3 V
认证状态:Not Qualified座面最大高度:2.794 mm
子类别:Clock Generators最大压摆率:160 mA
表面贴装:YES技术:CMOS
温度等级:OTHER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:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.5 mmuPs/uCs/外围集成电路类型:CLOCK GENERATOR, PROCESSOR SPECIFIC
Base Number Matches:1

C9840AY 数据手册

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C9840  
Clock Generator for Pentium Systems with Rambus Support  
Preliminary  
Product Features  
Product Description  
Three CPU clocks (66MHz, 2.5V)  
The C9840 is a clock generator solution that supports  
Intel Pentium III based Rambus memory architecture  
designs. It operates at a fixed CPU frequency of 66  
MHZ and supplies the DRCG reference clock required  
to drive the Rambus channel. Supplied in a 48 pin  
SSOP package it includes the patented and design  
proven Spread Spectrum EMI noise reduction  
One DRCGREF clock (66/50 MHz, 2.5V)  
Eight PCI clocks (1 free running during PCISTOP  
mode) (33 MHz, 3.3V)  
Two IOAPIC clocks (16.67 MHz, 2.5V)  
Two 48M’s (48 MHz, 3.3V), not affected by SS  
One 48M2V (48 MHz, 2.5V), not affected by SS  
Two REF’s (14.318 MHz, 3.3V), not affected by SS  
EMI reducing Spread Spectrum (SS) technology  
Support for both Mobile and Desktop Power-down  
and OE modes  
technology.  
This device integrates IMI Spread  
Spectrum clock technology to produce low EMI.  
Select Input Functionality  
SEL SEL  
CPU  
(0:2)  
DRCGREF  
PCI  
3V48M0;  
2V48M  
3-state  
48 MHz  
XIN/2  
3V66/3V48M1  
REF  
(0,1)  
3-state  
IOAPIC  
(0,1)  
3-state  
16.67 MHz  
XIN/12  
16.67 MHz  
1
0
0
1
1
0
0
1
0
1
(F,1:7)  
3-state  
33 MHz  
XIN/6  
P29 = 0  
P29 = 1  
3-state  
66 MHz  
XIN/3  
3-state  
50 MHz  
XIN/4  
3-state  
48 MHz  
XIN/2  
3-state  
66 MHz 14.318 MHz  
XIN/2 XIN  
66 MHz 14.318 MHz  
66 MHz  
66 MHz  
33 MHz  
48 MHz  
48 MHz  
Table 1  
Block Diagram  
Pin Configuration  
AVDD  
VDD  
PIN27_EN#/REF0  
CPU2_EN#/REF1  
XIN  
XOUT  
OSC  
Latch  
Latch  
VSS  
CPU2_EN#/REF0  
PIN27_EN#/REF1  
VDD  
1
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
VDDI  
2
IOAPIC0  
IOAPIC1  
VSS  
3
4
CPUSTOP#  
AVDD  
XIN  
5
VDDD  
CPU2  
XOUT  
6
DRCGREF  
VSS  
VDDC  
VSS  
7
SPREAD  
PLL1  
SEL (0,1)  
CPU (0,1)  
PCI_F  
8
VDDC  
VDDI  
PCI1  
9
CPU0  
IOAPIC (0,1)  
VDDP  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
CPU1  
PCI2  
CPU2  
VDDD  
VDDP  
PCI3  
VSS  
DRCGREF  
PCI_F  
VSS  
PD_ALRT#  
AVDD  
PCI4  
PCISTOP#  
PCI5  
AVSS  
PCI (1:7)  
s
VDDP  
CPUSTOP#  
VDD48  
2V48M  
VSS  
AVDD  
SEL66/48#  
PCI6  
VDD  
PCI7  
MUX  
3V66/3V48M1  
VSS  
VDD48  
2V48M  
PLL2  
PCISTOP#  
P W R D N #  
SPREAD  
SEL0  
SEL66/48#  
VDD  
VDD  
3V66/3V48M1  
3V48M0  
VSS  
3V48M0  
Clock  
Power  
Control  
Logic  
PD_ALRT#  
SEL1  
PWRDN#  
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.  
MILPITAS, CA 95035, USA TEL: 408-263-6300. FAX 408-263-6571  
http://www.imicorp.com  
Rev. 1.0  
3/9/2000  
Page 1 of 17  

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