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參數資料
| 型號： | LA7555 |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁數： | 2/11頁 |
| 文件大小： | 355K |
| 代理商： | LA7555 |
LA72680M
No.7955-10/21
Continued from preceding page.
DC voltage
Pin
No.
Pin Function Name
AC level
Function
Equivalent circuit
24
27
HEAD AMP input
terminal
(Hch)
HEAD AMP input
terminal
(Lch)
DC
PB; 2.0V
REC; 4.1V
HEAD AMP inputs (CH1 and CH2) is PB
mode.
REC-
ON
4.5mA
PB-ON
26
REC CURRENT AMP
output terminal
CURRENT AMP output in REC mode.
Common input terminal in PB mode.
VCC5V
8.3
REC-ON
PB-ON
28
CURRENT AMP
ADJUST terminal
DC; 2.4V
Terminal for adjusting the recording current.
400
2.7k
Pin28
500
A
29
ALC detection terminal
This is ALC detector terminal.
ALC becomes through switch when Pin29
pull up VCC.
1k
1k
1k
2k
2.5V
30
HiFi/NORMAL
detection terminal
This terminal is for detecting
demodulation noise and output which has
passed through the primary
HPF(fc=140kHz).
300k
200
39k
4.7
F
Pin30
Continued on next page.
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