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參數(shù)資料
| 型號： | LC72137M |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
| 封裝： | MFP20 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 348K |
| 代理商： | LC72137M |
No. 5743-21/22
LC72137, 72137M
4. DO Pin Usage Techniques
In addition to data output mode times, the DO pin can also be used to check for IF counter count completion and for
unlock detection output. Also, an input pin state can be output unchanged through the DO pin and input to the
controller.
5. Power Supply Pins
A capacitor of at least 2000 pF must be inserted between the power supply VDD and VSS pins for noise exclusion.
This capacitor must be placed as close as possible to the VDD and VSS pins.
6. Note on VCO designing
VCO ( local oscillator ) must keep its oscillation even if the control voltage ( Vtune ) goes to 0V. When there is a
possibility of oscillation halt, Vtune must be forcibly set to VCC temporarily to prevent the PLL from being
deadlocked. ( Deadlock clear circuit )
7. Front end connection example
Since this product is designed with the relatively high resistance of 200 k
for the pull-down (on) resistors built in to
the FMIN and AMIN pins, a common AM/FM local oscillator buffer can be used as shown in the following circuit.
Pin States at a Power-On Reset
FMIN
PLL
FE
AMIN
FM OSC
AM OSC
OSC buffer out
A10186
On resistance: 200 k
On resistance: 200 k
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| LC72137MA-AE | 功能描述:時鐘合成器/抖動清除器 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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| LC72146 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
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