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参数资料
| 型号： | MK1491E-14RLFTR |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| 封装： | SSOP-28 |
| 文件页数： | 1/4页 |
| 文件大小： | 70K |
| 代理商： | MK1491E-14RLFTR |
MK1491-14
OPTi ACPI Firestar Clock Source
MDS 1491-14 B
1
Revision 061801
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
Block Diagram
Description
Features
The MK1491-14 is a low cost, low jitter, high
performance clock synthesizer for OPTi’s
Firestar and Firestar+ chipsets for Pentium
Processor-based mobile computer applications.
Using analog Phase-Locked Loop (PLL)
techniques, the device uses a 14.318 MHz
crystal input to produce multiple output
clocks up to 75 MHz. It provides selectable
Host and PCI local bus clocks as well as
selectable clocks for Super I/O or Universal
Serial Bus (USB). The device has up to seven
Host output clocks.
The chip has three different power down
modes that reduce power on various clocks.
Packaged in 28 pin, 150 mil wide SSOP
Provides all critical timing for OPTi ACPI Firestar
and Firestar+
Early Host clock of 3.5ns
Separate VDD and skew adjust for Host 5,6, and 7
supports field upgrade to Firestar+ and new 2.5V
processors
48MHz USB, 24MHz SIO, and Audio clock support
Single pin CPU(Host) slowdown to 33.3MHz
Multiple power down modes
Low EMI Enable pin reduces EMI radiation (patent
pending)
Crystal
Oscillator
VDD
GND
HOST/PCI
Clocks
STOP#
SEL0
14.31818 MHz
crystal
Output
Buffers
Output
Buffer
Fixed
Clock
Output
Buffers
XI
XO
PS
VDDHOST1-4
SEL1
Host/2
F2
HOST 5, 7
PCI 1:5
SLOW#
Low EMI Enable
Output
Buffer
14.318 MHz
F1
Output
Buffer
FS1:0
Synch./Asynch. PCI
HOST1:4
Output
Buffers
4
2
5
VDDHOST5-7
EHOST6
33M
MUX
HS
3
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MK1491E-14RTR | 功能描述:IC CLK SRC OPTI ACPI FIRE 28QSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 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 |
| MK1492-03R | 功能描述:时钟驱动器及分配 INTEL MOBILE/SDRAM CLOCK SOURCE RoHS:否 制造商:Micrel 乘法/除法因子:1:4 输出类型:Differential 最大输出频率:4.2 GHz 电源电压-最大: 电源电压-最小:5 V 最大工作温度:+ 85 C 封装 / 箱体:SOIC-8 封装:Reel |
| MK1492-03RTR | 功能描述:IC CLK SRC MOBILE/SDRAM 28-QSOP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:- 标准包装:28 系列:- 类型:时钟/频率发生器 PLL:是 主要目的:Intel CPU 服务器 输入:时钟 输出:LVCMOS 电路数:1 比率 - 输入:输出:3:22 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3.135 V ~ 3.465 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:64-TFSOP （0.240"，6.10mm 宽） 供应商设备封装:64-TSSOP 包装:管件 |
| MK1493-01 | 制造商:ICS 制造商全称:ICS 功能描述:PCI Clock Generator |
| MK1493-01G | 制造商:ICS 制造商全称:ICS 功能描述:PCI Clock Generator |
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