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參數(shù)資料
| 型號(hào)： | MK1491E-14RTR |
| 英文描述： | OPTi ACPI Firestar Clock Source |
| 中文描述： | 奧普蒂ACPI的FireStar在時(shí)鐘源 |
| 文件頁(yè)數(shù)： | 1/4頁(yè) |
| 文件大?。?/td> | 69K |
| 代理商： | MK1491E-14RTR |
MK1491-14
OPTi ACPI Firestar Clock Source
MDS 1491-14 B
Integrated Circuit Systems, Inc. 525
Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
1
Revision 061801
Block Diagram
Description
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.
Features
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#
SLOW#
SEL0
SEL1
14.31818 MHz
crystal
Output
Buffers
Output
Buffer
Fixed
Clock
Output
Buffers
XI
XO
PS
VDD
HOST1-4
Host/2
F2
HOST 5, 7
PCI 1:5
Low EMI Enable
Output
Buffer
14.318 MHz
F1
Output
Buffer
FS1:0
Synch./Asynch. PCI
HOST1:4
Output
Buffers
4
2
5
VDD
HOST5-7
HS
EHOST6
33M
MUX
3
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK1492-03R | 功能描述:時(shí)鐘驅(qū)動(dòng)器及分配 INTEL MOBILE/SDRAM CLOCK SOURCE RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
| MK1492-03RTR | 功能描述:IC CLK SRC MOBILE/SDRAM 28-QSOP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:- 標(biāo)準(zhǔn)包裝:28 系列:- 類型:時(shí)鐘/頻率發(fā)生器 PLL:是 主要目的:Intel CPU 服務(wù)器 輸入:時(shí)鐘 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:3:22 差分 - 輸入:輸出:無(wú)/是 頻率 - 最大:400MHz 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:64-TFSOP （0.240"，6.10mm 寬） 供應(yīng)商設(shè)備封裝:64-TSSOP 包裝:管件 |
| MK1493-01 | 制造商:ICS 制造商全稱:ICS 功能描述:PCI Clock Generator |
| MK1493-01G | 制造商:ICS 制造商全稱:ICS 功能描述:PCI Clock Generator |
| MK1493-01GTR | 制造商:ICS 制造商全稱:ICS 功能描述:PCI Clock Generator |
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