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| 型号： | ICS874002AGT |
| 元件分类： | 时钟及定时 |
| 英文描述： | 874002 SERIES, PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, MO-153, TSSOP-20 |
| 文件页数： | 1/13页 |
| 文件大小： | 260K |
| 代理商： | ICS874002AGT |
Integrated
Circuit
Systems, Inc.
874002AG
www.icst.com/products/hiperclocks.html
REV. A APRIL 6, 2006
1
ICS874002
PCI EXPRESS
JITTER ATTENUATOR
GENERAL DESCRIPTION
The ICS874002 is a high performance Differential-
to-LVDS Jitter Attenuator designed for use in
PCI Express systems. In some PCI Express
systems, such as those found in desktop PCs,
the PCI Express clocks are generated from a
low bandwidth, high phase noise PLL frequency synthesizer.
In these systems, a jitter attenuator may be required to
attenuate high frequency random and deterministic jitter
components from the PLL synthesizer and from the system
board. The ICS874002 has 3 PLL bandwidth modes:
200kHz, 400kHz, and 800kHz. The 200kHz mode will
provide maximum jitter attenuation, but with higher PLL
tracking skew and spread spectrum modulation from the
motherboard synthesizer may be attenuated. The 400kHz
provides an intermediate bandwidth that can easily track
triangular spread profiles, while providing good jitter
attenuation. The 800kHz bandwidth provides the best
tracking skew and will pass most spread profiles, but the
jitter attenuation will not be as good as the lower bandwidth
modes. Because some 2.5Gb serdes have x20 multipliers
while others have than x25 multipliers, the 874002 can be
set for 1:1 mode or 5/4 multiplication mode (i.e. 100MHz
input/125MHz output) using the F_SEL pin.
The ICS874002 uses ICS 3rd Generation FemtoClockTM
PLL technology to achieve the lowest possible phase noise.
The device is packaged in a 20 Lead TSSOP package,
making it ideal for use in space constrained applications
such as PCI Express add-in cards.
FEATURES
Two Differential LVDS output pairs
One Differential clock input
CLK and nCLK supports the following input types:
LVPECL, LVDS, LVHSTL, SSTL, HCSL
Output frequency range: 98MHz - 160MHz
Input frequency range: 98MHz - 128MHz
VCO range: 490MHz - 640MHz
Cycle-to-cycle jitter: 35ps (maximum)
3.3V operating supply
Three bandwidth modes allow the system designer to
make jitter attenuation/tracking skew design trade-offs
0°C to 70°C ambient operating temperature
Available in both standard and lead-free RoHS compliant
packages
HiPerClockS
ICS
QA0
nQA0
BLOCK DIAGRAM
BW_SEL
0 = PLL Bandwidth: 200kHz
Float = PLL Bandwidth: 400kHz (Default)
1 = PLL Bandwidth: 800kHz
PLL BANDWIDTH (TYPICAL)
0
÷5
1
÷4
÷5 (fixed)
VCO
490 - 640 MHz
Phase
Detector
(default)
PD
OE
F_SEL
BW_SEL
0 = 200kHz
Float = 400kHz
1 = 800kHz
CLK
nCLK
FB_IN
nFB_IN
MR
QA1
nQA1
FB_OUT
nFB_OUT
PD
PU
Float
PIN ASSIGNMENT
ICS874002
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm
package body
G Package
Top View
nQA0
VDDO
FB_OUT
nFB_OUT
MR
BW_SEL
nc
VDDA
F_SEL
VDD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
QA0
VDDO
QA1
nQA1
nFB_IN
FB_IN
GND
nCLK
CLK
OE
相关PDF资料 |
PDF描述 |
|---|---|
| ICS874002AGLF | 874002 SERIES, PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS874003AGI-03 | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS874003AGI-03LFT | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS874003AGLFT | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS874003AGT | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS874003AG-02LF | 功能描述:IC JITTER ATTENUATOR 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1 系列:- 类型:时钟/频率发生器，多路复用器 PLL:是 主要目的:存储器，RDRAM 输入:晶体 输出:LVCMOS 电路数:1 比率 - 输入:输出:1:2 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:Digi-Reel® 其它名称:296-6719-6 |
| ICS874003AG-02LFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003AG-04LF | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003AG-04LFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003AGI-02LF | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1 系列:- 类型:时钟/频率发生器，多路复用器 PLL:是 主要目的:存储器，RDRAM 输入:晶体 输出:LVCMOS 电路数:1 比率 - 输入:输出:1:2 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:Digi-Reel® 其它名称:296-6719-6 |
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