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参数资料
| 型号： | LA75505M |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| 封装： | 0.300 INCH, MFP-24 |
| 文件页数： | 12/13页 |
| 文件大小： | 224K |
| 代理商： | LA75505M |
No. 6930-8/13
LA75505M
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
This pin can be used both as the crystal resonator
pin and IF switch.
The 58.75-MHz mode is selected by inserting 220
k
between pin 12 and GND, the 45.75 MHz mode
by leaving the pin open.
4-MHz input is possible from this pin.
In the case of 4-MHz external input, input 86 dB
or more.
12
REF OSC
Continued on next page.
Pin 10 is the SIF AGC filter pin. Use a capacitance
of 0.01 F to 0.1 F.
10
SIF AGC FILTER
10
Not connected
11
NC
Pin 13 is the AFT output pin.
Use external resistors of 47 k
and a filter
capacitance 0.1 F.
The AFT circuit generates the AFT voltage by
comparing the signal obtained by dividing the
4-MHz reference frequency with the signal obtained
by dividing VCO.
Since it uses a digital phase comparator, a dead
zone exists in the AFT center.
13
AFT OUT
waveform
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