TM Family Datasheet Page 17 of 77 August 2009 – Re" />
參數(shù)資料
型號(hào)： PI7C9X20303ULAZPE
廠商： Pericom
文件頁數(shù)： 9/77頁
文件大小： 0K
描述： IC PCIE PACKET SWITCH 132TQFN
標(biāo)準(zhǔn)包裝： 168
系列： UltraLo™
應(yīng)用： 封裝開關(guān)，3 端口/3 線道
接口： PCI Express
封裝/外殼： 132-VFQFN 雙排裸露焊盤
供應(yīng)商設(shè)備封裝： 132-TQFN-EP（10x10）
包裝： 托盤
安裝類型： 表面貼裝
PI7C9X20303UL
3Port-3Lane PCI Express Switch
UltraLo
TM Family
Datasheet
Page 17 of 77
August 2009 – Revision 1.1
Pericom Semiconductor
DTX [3:0]
ACTUAL CURRENT / NOMINAL CURRENT
0111
1.35
1000
0.60
1001
0.65
1010
0.70
1011
0.75
1100
0.80
1101
0.85
1110
0.90
1111
0.95
The equalization function of transmitting channels can optimize the driver current for different back-plane lengths
and materials. The table shown below lists the combinations of de-emphasized driver current (ITX –IEQ) to non-de-
emphasized driver current (ITX) for different values of DEQ [3:0].
Table 5-3 De-emphasis Level versus DEQ [3:0]
DEQ [3:0]
(ITX –IEQ) / ITX
De-emphasis (dB)
0000
1.00
0.00
0001
0.96
-0.35
0010
0.92
-0.72
0011
0.88
-1.11
0100
0.84
-1.51
0101
0.80
-1.94
0110
0.76
-2.38
0111
0.72
-2.85
1000
0.68
-3.35
1001
0.64
-3.88
1010
0.60
-4.44
1011
0.56
-5.04
1100
0.52
-5.68
1101
0.48
-6.38
1110
0.44
-7.13
1111
0.40
-7.96
By default, the DEQ is set to “1000” to conform to the PCI Express specification, which calls for a de-emphasis
level of between –3 dB and –4 dB.
In order to improve the data stream integrity across the channels, the receiver of each port of the Switch includes a
reception equalizer to mitigate the effects of ISI. The reception equalizer is implemented as a selectable high-pass
filter at the input node, and it is capable of removing as much as 0.4UI of ISI related jitter. The following table
shows a simple guideline for selecting the appropriate value to adapt with different lengths or connector numbers in
various applications.
Table 5-4 Rx Equalizer Settings (RXEQCTL)
RXEQCTL [1]
RXEQCTL [0]
Rx Eq Setting
Input Jitter
Channel Length
0
Max Rx Eq
> 0.25 UI
> 20" and two or more
connectors
0
1
Min Rx Eq
Between 0.1 UI
and 0.25 UI
Between 8'' and 20" and up to
two connectors
1
X
< 0.1 UI
8" or less, up to one connector
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PI7C9X20404GPBNBE 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 4port 4lane PCIe PacketSwitch RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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PI7C9X20404SLCFDE 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 4port 4lane PCIe Packet Switch RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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