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參數(shù)資料
| 型號： | LC72144M |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大小： | 307K |
| 代理商： | LC72144M |
2. Notes on the FMIN, AMIN, HCTR/I-6, and LCTR/I-7 Pins
The coupling capacitors must be placed as close to the pin as possible. A capacitance of about 100 pF is desirable. In
particular, only use capacitances of under 1000 pF with the HCTR/I-6, and LCTR/I-7 pins. Large capacitances will
increase the time required for the pin to reach the bias level and, depending on the relationship with the wait time,
may cause counting errors.
3. Notes on IF counting
→ SD must be used together with IF counting
When using the general-purpose counter for IF counting, always use the IF-IC SD (station detect) signal. The
microcontroller should first check for the presence of the SD signal, and then turn on the IF count buffer only if that
signal is present to perform an IF count. Techniques that use only an IF count to implement an autosearch function
are dangerous because they may stop at frequencies that do not have a station due to leakage from the IF count
buffer.
4. Using the DO pin
In modes other than data output mode, the DO pin is also used for counter completion, unlock detection, and for
checking for changes in the input pin.
The state of the input pin (I/O-1, I/O-2) can be input to the controller directly through the DO pin.
5
Notes on using XBUF
When the XBUF output is turned on (when AM up-conversion is used), since the XBUF signal leaks into adjacent
pins, the pins PD0 and I/O-3, which are adjacent to XBUF, must not be used for AM reception control. Use the PD1
pin for the AM reception charge pump. Turn off the XBUF output (by setting the XB data to 0) when using PD0 and
I/O-3 for FM reception control.
6
Power supply pins
To exclude noise, a capacitor of at least 2000 pF must be inserted between the power supply VDD and VSS lines.
Locate this capacitor as close to the chip's VDD and VSS pins as possible.
Pin States at Power On and Reset
F: Floating
L: Low
No. 5377-21/22
LC72144M
State
Power On
Reset
State
Power On
Reset
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC72146 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72146M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning |
| LC72146MA-AH | 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 |
| LC72146MHSQR-U-TRM-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
| LC72146V | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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