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參數(shù)資料
| 型號： | MK1491-09FLNTR |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 66 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| 封裝： | 0.209 INCH, ROHS COMPLIANT, MO-150, SSOP-28 |
| 文件頁數(shù)： | 4/9頁 |
| 文件大?。?/td> | 165K |
| 代理商： | MK1491-09FLNTR |
AMD Geode GX2 Clock Source
MDS 1491-09 I
4
Revision 021506
Integrated Circuit Systems, Inc.
● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
MK1491-09
Power Down Control Table
Power-on Default Conditions
External Components
The MK1491-09 requires some inexpensive external
components for proper operation. Decoupling
capacitors of 0.1F should be connected on each VDD
pin to ground, as close to the MK1491-09 as possible.
A series termination resistor of 33
may be used for
each clock output. See the discussion below for other
external resistors required for proper I/O operation. The
14.318 MHz oscillator has internal caps that provide
the proper load for a parallel resonant crystal with
CL=18 pF. For tuning with other values of CL, the
formula 2*(CL-18) gives the value of each capacitor that
should be connected between X1 and ground and X2
and ground.
I/O Structure
The MK1491-09 provides more functionality in a 28-pin
package by using a unique I/O technique. The device
checks the status of all I/O pins during power-up. This
status (pulled high or low) then determines the
frequency selections and power down modes (see the
tables on pages 2 and 3). Within 10ms after power up,
the inputs change to outputs and the clocks start up. In
the diagrams below, the 33
resistors are the normal
output termination resistors. The 10k
resistor pulls
low to generate a logic zero when needed. Weak
internal pull-up resistors are present on TS#, Spread#,
PD#, and Sel66/33 to pull the pin to high when left
floating.
*Note: Do not use a TTL load. This will overcome the
10 k
pull-down and force the input to a logic 1.
PD#
Functions
0
All clocks are stopped low.
1
All clocks are running.
Pin #
Function
Default
Condition
14
TS#
H
Latched input. All outputs enabled when high. When low, all outputs are in
tristate.
27
Spread#
H
Latched input. Spread disabled when high. When low, spread is enabled
on all ouputs except ref clocks and 48 MHz.
10
Sel66/33#
H
This is an active input. When high, it selects PCI=66 MHz outputs; when
low, selects PCI frequency = 33 MHz outputs.
33
To load*
10 k
I/O
For select
= 0 (low)
Do not stuff for
“1” selection
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MK1492-03RLF | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| MK1492-03RTR | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| MK1492-03RLFTR | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| MK1492-03R | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
| MK1492-03RLF | 75 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK149109FTR | 制造商:ICS 功能描述:New |
| MK1491-09FTR | 功能描述:IC CLK SRC AMD GEODE GX2 28-SSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| MK1491-14 | 制造商:ICS 制造商全稱:ICS 功能描述:OPTi ACPI Firestar Clock Source |
| MK1491E-14R | 功能描述:IC CLK SRC OPTI ACPI FIRE 28QSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| MK1491E-14RLF | 功能描述:IC CLK SRC OPTI ACPI FIRE 28QSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:- 標(biāo)準(zhǔn)包裝:28 系列:- 類型:時鐘/頻率發(fā)生器 PLL:是 主要目的:Intel CPU 服務(wù)器 輸入:時鐘 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:3:22 差分 - 輸入:輸出:無/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 |
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