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参数资料
| 型号： | ICS874004AG |
| 元件分类： | 时钟及定时 |
| 英文描述： | 874004 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： | 1/10页 |
| 文件大小： | 562K |
| 代理商： | ICS874004AG |
Integrated
Circuit
Systems, Inc.
874004AG
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 2, 2005
1
ICS874004
PCI EXPRESS
JITTER ATTENUATOR
PRELIMINARY
GENERAL DESCRIPTION
The ICS874004 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, highphase 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 ICS874004
has 3 PLL bandwidth modes: 200KHz, 400KHz, and 800KHz.
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 providing 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 bandwidth modes. Because some 2.5 Gb serdes
have x20 multipliers while others have than x25 multipliers, the
874004 can be set for 1:1 mode or 5/4 multiplication mode (i.e.
100MHz input/125MHz output) using the F_SEL pin.
The ICS874004 uses ICS 3rd Generation FemtoClockTM PLL
technology to achieve 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
(4) Differential LVDS output pairs
(1) 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: 50ps (maximum) design target
3.3V operating supply
3 bandwidth modes allow the system designer to make jitter
attenuation/tracking skew design trade-offs
0°C to 70°C ambient operating temperature
HiPerClockS
ICS
QA0
nQA0
BLOCK DIAGRAM
BW_SEL
0 = PLL Bandwidth: ~200KHz
Float = PLL Bandwidth: ~400KHz (Default)
1 = PLL Bandwidth: ~800KHz
PLL BANDWIDTH
0 ÷5
(default)
1
÷4
÷5
VCO
490-640MHz
Phase
Detector
PD
OEA
F_SEL
BW_SEL
0 = ~200KHz
Float = ~400KHz
1 = ~800KHz
CLK
nCLK
FB_IN
nFB_IN
MR
OEB
PU
QA1
nQA1
QB0
nQB0
QB1
nQB1
FB_OUT
nFB_OUT
PD
PU
Float
PIN ASSIGNMENT
ICS874004
24-Lead TSSOP
4.40mm x 7.8mm x 0.92mm
package body
G Package
Top View
nQA0
nQB0
QB0
VDDO
FB_OUT
nFB_OUT
MR
BW_SEL
VDDA
F_SEL
VDD
OEA
1
2
3
4
5
6
7
8
9
10
11
12
QA0
VDDO
QA1
nQA1
QB1
nQB1
nFB_IN
FB_IN
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS874005AG-04LF | 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 |
| ICS874005AG-04LFT | 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 |
| ICS874005AGLF | 功能描述:IC JITTER ATTENUATOR 24-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 |
| ICS874005AGLFT | 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 |
| 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 |
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