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參數(shù)資料
| 型號： | MK3720BLF |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 54 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 100K |
| 代理商： | MK3720BLF |
MK3720
MDS 3720 H
1
Revision 052504
Integrat ed Circuit Systems ● 525 Race Stre et, San Jo se, CA 9 5126 ● te l (40 8 ) 2 97-12 01 ● www.ics t.co m
27 MHZ AND 54 MHZ 3.3 VOLT VCXO
Description
The MK3720D and MK3720B are drop-in replacements
for the MK3720S and MK3720A devices. Compared to
these earlier devices the MK3720D and MK3720B offer
a wider operating frequency range and improved power
supply noise rejection.
The MK3720 is a low-cost, low-jitter, high-performance
3.3 Volt VCXO designed to replace expensive 13.5, 27,
or 54 MHz VCXOs. The patented on-chip Voltage
Controlled Crystal Oscillator accepts a 0 to 3.3 V input
voltage to cause the output clocks to vary by ±100 ppm.
Using ICS’ patented VCXO and analog/digital
Phase-Locked Loop (PLL) techniques, the device uses
an inexpensive external pullable crystal input to
produce output clocks of 13.5 MHz, 27 MHz, and 54
MHz.
The MK3720D exhibits a moderate VCXO gain of 120
ppm/V typical, when used with a high-quality external
pullable quartz crystal. The MK3720B offers a higher
VCXO gain of 150 ppm/V, similar to the earlier
MK3720A. The higher intrinsic VCXO gain of the
MK3720B may help compensate for the reduced
pullability of a low quality crystal used in some
applications. However, higher VCXO gain may also
increase clock output phase noise.
The frequency of the on-chip VCXO is adjusted by an
external control voltage input into pin VIN. Because
VIN is a high impedance input, it can be driven directly
from an PWM RC integrator circuit.
Features
MK3720D and MK3720B are drop-in upgrades to the
earlier MK3720S and MK3720A devices
Packaged in 8-pin SOIC
Available in Pb (lead) free package (MK3720D only)
Operating voltage of 3.3 V (±5%)
Output clocks of 54, 27, and 13.5 MHz
Uses an inexpensive 13.500 MHz external crystal
On-chip VCXO (patented) with pull range of 200ppm
(minimum)
VCXO tuning voltage of 0 to 3.3V
12 mA output drive capability at TTL levels
Advanced, low-power, sub-micron CMOS process
MK3720D is Recommended for New Designs
Block Diagram
27 M H z
X1
X2
V o ltage
C o n tro lle d
Cry s ta l
O s c illa to r
VIN
1 3 .5 M H z
Pu lla b le
Cry s ta l
PL L /C lo c k
S y n thes is
Circ u itry
54 M H z
1 3 .5 M H z
VD D
GN D
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MK3727CTR | 36 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3727CTR | 36 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3727C | 36 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3727ETR | 36 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| MK3727ELF | 36 MHz, OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MK3720D | 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(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| MK3720DLF | 功能描述:時鐘合成器/抖動清除器 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 |
| MK3720DLFTR | 功能描述:時鐘合成器/抖動清除器 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 |
| MK3720DTR | 功能描述:時鐘合成器/抖動清除器 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 |
| MK3720S | 制造商:ICS 制造商全稱:ICS 功能描述:27 MHz and 54 MHz 3.3 Volt VCXO |
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