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IBM25CPC945CQ3C-2 参数 Datasheet PDF下载

IBM25CPC945CQ3C-2图片预览
型号: IBM25CPC945CQ3C-2
PDF下载: 下载PDF文件 查看货源
内容描述: [Micro Peripheral IC, CMOS, PBGA1182,]
分类和应用:
文件页数/大小: 69 页 / 1861 K
品牌: IBM [ IBM ]
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Datasheet  
Preliminary  
CPC945 Bridge and Memory Controller  
Table 3-7. DDR_REFCLK Reference Clock Specifications  
Value  
Parameter  
Symbol  
Unit  
Minimum  
Maximum  
550  
Clock rise and fall time  
t
RISE tFALL  
ps  
%
ps  
V
Clock duty cycle  
45  
55  
Clock input jitter  
tJIT  
VICM  
VIH  
100  
DDR_REFCLK common mode voltage level  
DDR_REFCLK input high voltage  
DDR_REFCLK input low voltage  
DDR_REFCLK input voltage range  
0
VICM + 0.05  
- 0.3  
1.8  
2.15  
V
VIL  
VICM + 0.05  
V
V
IH - VIL  
100  
mV  
Figure 3-3. PLL Reference Clock Parameters  
tCKH  
tCKL  
tJIT  
Reference Clock  
tRISE  
HT_REFCLK and PCIE_REFCLK PLL inputs can be either LVDS or CMOS. There is no setting required to  
select between these two types of input. It is determined strictly by the inputs provided by the system design.  
Table 3-8. HT_REFCLK and PCIE_REFCLK Reference Clock Input Specifications for LVDS  
Value  
Parameter  
Symbol  
Unit  
Notes  
1
Minimum  
0.35  
Maximum  
0.55  
Clock rise and fall time  
t
RISE tFALL  
ns  
%
Clock duty cycle  
45  
55  
Clock input jitter  
tJIT  
100  
ps  
SE peak-to-peak at PLL inputs  
V
IH - VIL  
250  
450  
mV  
2
Note:  
1. LVDS at 20 and 80%.  
2. Single ended (SE) means that REFCLK_N and REFCLK_P must each see this swing.  
A15-6009-03  
December 18, 2007 - IBM Confidential  
Electrical and Thermal Characteristics  
Page 27 of 69  
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