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參數(shù)資料
| 型號(hào)： | MK3715STR |
| 廠(chǎng)商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類(lèi)： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 108 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 114K |
| 代理商： | MK3715STR |
LOW COST 3.3 VOLT VCXO
MDS 3715 B
3
Revision 021804
In te gr ated Circuit Systems ● 525 Ra ce Street, San Jose, CA 9512 6 ● tel (4 08) 297-1 201 ● www.icst.com
MK3715
External Component Selection
The MK3715 requires a minimum number of external
components for proper operation.
Decoupling Capacitors
A decoupling capacitor of 0.01
F should be connected
between VDD and GND on pins 2 and 4 as close to the
MK3715 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 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 MK3715 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 oscillation frequency of a quartz crystal is
determined by its “cut” and by the load capacitors
connected to it. The MK3715 incorporates on-chip
variable load capacitors that “pull” (change) the
frequency of the crystal. The crystal specified for use
with the MK3715 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
Drift Over Temperature and Aging
±50 ppm
Load Capacitance
14 pf
C0/C1 Ratio
240 Max
Equivalent Series Resistance
35
Max
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 MK3715. There should be no via’s 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. Stuffing of these capacitors
on the PCB is optional. 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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PDF描述 |
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| MK3720ALF | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3720SLF | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3720SLFTR | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3720S | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3720ALF | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK3720 | 制造商:ICS 制造商全稱(chēng):ICS 功能描述:27 MHz and 54 MHz 3.3 Volt VCXO |
| MK3720A | 制造商:ICS 制造商全稱(chēng):ICS 功能描述:27 MHz and 54 MHz 3.3 Volt VCXO |
| MK3720ATR | 制造商:ICS 制造商全稱(chēng):ICS 功能描述:27 MHz and 54 MHz 3.3 Volt VCXO |
| MK3720D | 功能描述:IC VCXO DTV/SET-TOP 8-SOIC RoHS:否 類(lèi)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:2,000 系列:- 類(lèi)型:PLL 時(shí)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(wú) 頻率 - 最大:240MHz 除法器/乘法器:是/無(wú) 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:32-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| MK3720DLF | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 27MHZ AND 54MHZ 3.3V VCXO RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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