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參數(shù)資料
| 型號： | MK5814STR |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 128 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大小： | 151K |
| 代理商： | MK5814STR |
Low EMI Clock Generator
MDS 5814 A
3
Revision 020204
Integrated Circuit Systems, Inc.
525 Race Street, San Jose, CA 95126
tel (408) 297-1201
www.icst.com
MK5814
Pin Descriptions
External Components
The MK5814 requires a minimum number of external
components for proper operation.
Decoupling Capacitor
A decoupling capacitor of 0.01F must be connected
between VDD and GND on pins 7 and 2. Connect the
capacitor as close to these pins as possible. For
optimum device performance, mount the decoupling
capacitor on the component side of the PCB. Avoid the
use of vias in the decoupling circuit.
Series Termination Resistor
Use series termination when the PCB trace between
the clock output and the load is over 1 inch. To series
terminate a 50
trace (a commonly used trace
impedance), place a 33
resistor in series with the
clock line. Place the resistor as close to the clock
output pin as possible. The nominal impedance of the
clock output is 20
.
Tri-level Select Pin Operation
The S1 and S0 select pins are tri-level, meaning that
they have three separate states to make the selections
shown in the table on page 2. To select the M (mid)
level, the connection to these pins must be eliminated
by either floating them originally, or tri-stating the GPIO
pins which drive the select pins.
PCB Layout Recommendations
For optimum device performance and lowest output
phase noise, observe the following guidelines:
1) Mount the 0.01F decoupling capacitor on the
component side of the board as close to the VDD pin
as possible. No vias should be used between the
decoupling capacitor and VDD pin. The PCB trace to
the VDD pin and the PCB trace to the ground via
should be kept as short as possible.
2) To minimize EMI, place the 33
series-termination
resistor (if needed) close to the clock output.
3) An optimum layout is one with all components on the
same side of the board, thus minimizing vias through
other signal layers. Other signal traces should be
routed away from the MK5814 device. This includes
signal traces located underneath the device, or on
layers adjacent to the ground plane layer used by the
device.
Crystal Information
The crystal used should be a fundamental mode (do
not use third overtone), parallel resonant crystal. To
optimize the initial accuracy, connect crystal capacitors
from pins X1 to ground and X2 to ground. The value of
these capacitors is given by the following equation:
Crystal caps (pF) = (CL - 6) x 2
Pin
Number
Pin
Name
Pin Type
Pin Description
1
X1/ICLK
Input
Connect to 4-32 MHz crystal or clock.
2
GND
Power
Connect to ground.
3
S1
Input
Function select 1 input. Selects spread amount and direction per table above.
(default-internal mid-level).
4
S0
Input
Function select 0 input. Selects spread amount and direction per table above.
(default-internal mid-level).
5
SSCLK
Output
Clock output with Spread spectrum
6
FRSEL
Input
Function select for input frequency range. Default to mid-level “M”.
7
VDD
Power
Connect to +3.3 V.
8
X2
XO
Crystal connection to 4-32 MHz crystal. Leave unconnected for clock
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK5818S | 功能描述:IC CLK GEN SPREAD SPECTRUM 8SOIC RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| MK5818SLF | 功能描述:時(shí)鐘驅(qū)動器及分配 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 |
| MK5818SLFTR | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MK5818STR | 功能描述:IC CLK GEN SPREAD SPECTRUM 8SOIC RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| MK5901F | 制造商:Ohmite Mfg Co 功能描述: |
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