參數(shù)資料
型號(hào)： LC72122V
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： SSOP-20
文件頁(yè)數(shù)： 14/22頁(yè)
文件大?。?/td> 346K
代理商： LC72122V
No. 6113-21/22
LC72122V
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 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. Structure of the sub-charge pump circuit provided for high-speed frequency locking
The fast locking sub-charge pump circuit (PDS) is controlled by the SUBC control signal.
When the PDS circuit is operating, the effective resistance of R1 is reduced to about 250
.
This reduces the locking time.
Note that during normal reception, SUBC should be set to 0 to stop PDS circuit operation, and SUBC should be set
to 1 to operate the PDS circuit when changing stations.
Pin States at a Power-On Reset
Note: Although the IC is initialized after power is first applied by the power on reset circuit, applications must also send a full set of data over the CCB bus
immediately after power is first applied to assure safe and stable operation.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC72122V-MPB-E 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack
LC72122V-TLM-E 功能描述:時(shí)鐘合成器/抖動(dòng)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
LC72130 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:AM/FM PLL Frequency Synthesizer
LC72130-D-E 制造商:ON Semiconductor 功能描述:PLL FREQUENCY SYNTHESIZER - Ammo Pack 制造商:ON Semiconductor 功能描述:FNFLD / PLL FREQUENCY SYNTHESIZER
LC72130-E 功能描述:時(shí)鐘合成器/抖動(dòng)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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