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參數(shù)資料
| 型號： | MK3711DMLFTR |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 16 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, SOIC-8 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 121K |
| 代理商： | MK3711DMLFTR |
LOW COST 8 - 16 MHZ 3.3 VOLT VCXO
MDS 3711 I
3
Revision 062405
In te grat ed Circuit Syst ems ● 525 Ra ce St reet , San Jose, CA 9512 6 ● t e l (4 08) 297-1 201 ● www.icst.com
MK3711
External Component Selection
The MK3711 requires a minimum number of external
components for proper operation.
Decoupling Capacitor
A decoupling capacitor of 0.01F must be connected
between VDD (pin 2) and GND (pin 4), as close to
these pins as possible. For optimum device
performance, the decoupling capacitor should be
mounted on the component side of the PCB. Avoid the
use of vias in the decoupling circuit.
Series Termination Resistor
When the PCB trace between the clock output (CLK,
pin 5) and the load is over 1 inch, series termination
should be used. To series terminate a 50
trace (a
commonly used trace impedance) place a 33
resistor
in series with the clock line, as close to the clock output
pin as possible. The nominal impedance of the clock
output is 20
.
Quartz Crystal
The MK3711 VCXO function consists of the external
crystal and the integrated VCXO oscillator circuit. To
assure the best system performance (frequency pull
range) and reliability, a crystal device with the
recommended parameters (shown below) must be
used, and the layout guidelines discussed in the
following section shown must be followed.
The frequency of oscillation of a quartz crystal is
determined by its “cut” and by the load capacitors
connected to it. The MK3711 incorporates on-chip
variable load capacitors that “pull” (change) the
frequency of the crystal. The crystal specified for use
with the MK3711 is designed to have zero frequency
error when the total of on-chip + stray capacitance is 14
pF.
Recommended Crystal Parameters:
Initial Accuracy at 25°C
±20 ppm
Temperature Stability
±30 ppm
Aging
±20 ppm
Load Capacitance
14 pf
Shunt Capacitance, C0
7 pF Max
C0/C1 Ratio
250 Max
Equivalent Series Resistance
35
Max
For crystal frequencies between 13.5 MHz and 16
MHz, the nominal crystal load capacitance
specification should be 14 pF. Contact ICS MicroClock
applications regarding the use of a crystal below 13.5
MHz.
The external crystal must be connected as close to the
chip as possible and should be on the same side of the
PCB as the MK3711. There should be no vias between
the crystal pins and the X1 and X2 device pins. There
should be no signal traces underneath or close to the
crystal. See application note MAN05.
Crystal Tuning Load Capacitors
The crystal traces should include pads for small fixed
capacitors, one between X1 and ground, and another
between X2 and ground. The need for these capacitors
is determined at system prototype evaluation, and is
influenced by the particular crystal used (manufacture
and frequency) and by PCB layout. The typical required
capacitor value is 1 to 4 pF.
The procedure for determining the value of these
capacitors can be found in application note MAN05.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MK3711DMTR | 功能描述:IC VCXO DTV/SET-TOP 8-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應商設備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| MK3711DTR | 制造商:ICS 制造商全稱:ICS 功能描述:LOW COST 8 - 16 MHZ 3.3 VOLT VCXO |
| MK3711S | 制造商:ICS 制造商全稱:ICS 功能描述:LOW COST 8 - 16 MHZ 3.3 VOLT VCXO |
| MK3711STR | 制造商:ICS 制造商全稱:ICS 功能描述:LOW COST 8 - 16 MHZ 3.3 VOLT VCXO |
| MK3713 | 制造商:ICS 制造商全稱:ICS 功能描述:Low Cost 3.3 Volt VCXO |
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