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参数资料
| 型号： | ICS8741004AGI |
| 元件分类： | 时钟及定时 |
| 英文描述： | 8741004 SERIES, PLL BASED CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| 封装： | 4.40 X 7.80 MM, 0.92 MM HEIGHT, MO-153, TSSOP-24 |
| 文件页数： | 1/12页 |
| 文件大小： | 333K |
| 代理商： | ICS8741004AGI |
Integrated
Circuit
Systems, Inc.
8741004AGI
www.icst.com/products/hiperclocks.html
REV. A MAY 31, 2006
1
ICS8741004I
PCI EXPRESS
JITTER ATTENUATOR
PRELIMINARY
GENERAL DESCRIPTION
The ICS8741004I is a high performance
Differential-to-LVDS/HCSL 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 ICS8741004I 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. 400kHz provides an intermediate bandwidth
that can easily track triangular spread profiles, while provid-
ing good jitter attenuation. 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 band-
width modes. Because some 2.5Gb serdes have x20
multipliers while others have x25 multipliers, the 8741004I
can be set for 1:1 mode or 5/4 multiplication mode
(i.e. 100MHz input/125MHz output) using the FSEL pins.
The ICS8741004I uses ICS 3rd Generation FemtoClockTM
PLL technology to achive the lowest possible phase noise.
The device is packaged in a 24 Lead TSSOP package,
making it ideal for use in space constrained applications such
as PCI Express add-in cards.
FEATURES
Two differential LVDS and two HCSL 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: 15ps (typical)
3.3V operating supply
Three bandwidth modes allow the system designer to
make jitter attenuation/tracking skew design trade-offs
-40°C to 85°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
F_SELA
0
÷5 (default)
1
÷4
F_SELB
0
÷5 (default)
1
÷4
VCO
490 - 640 MHz
Phase
Detector
M = ÷5 (fixed)
Current Set
PD
OEA
F_SELA
BW_SEL
0 = ~200kHz
Float = ~400kHz
1 = ~800kHz
CLK
nCLK
F_SELB
MR
IREF
OEB PU
QA1
nQA1
QB0
nQB0
QB1
nQB1
PD
PU
Float
PIN ASSIGNMENT
ICS8741004I
24-Lead TSSOP
4.40mm x 7.8mm x 0.92mm
package body
G Package
Top View
nQA1
QA1
VDDO
QA0
nQA0
MR
BW_SEL
nc
VDDA
F_SELA
VDD
OEA
1
2
3
4
5
6
7
8
9
10
11
12
nQB1
QB1
VDDO
QB0
nQB0
IREF
F_SELB
OEB
GND
nCLK
CLK
24
23
22
21
20
19
18
17
16
15
14
13
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
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PDF描述 |
|---|---|
| ICS8741004AGT | 8741004 SERIES, PLL BASED CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| ICS8741004BGILFT | 8741004 SERIES, PLL BASED CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| ICS8745AMI-21LF | PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS8745AMI-21LFT | PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| ICS8745AMI-21 | PLL BASED CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS8741004AGLF | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP 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 |
| ICS8741004AGLFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP 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 |
| ICS8741004BGILF | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP 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 |
| ICS8741004BGILFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP 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 |
| ICS874208BKILF | 制造商:Integrated Device Technology Inc 功能描述:IC CLK BUFFER/DIVIDER 32VFQFN |
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