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參數資料
| 型號： | LA7458W |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, SQFP-64 |
| 文件頁數： | 2/22頁 |
| 文件大小： | 244K |
| 代理商： | LA7458W |
LA7458W
No.A0642-10/22
Continued from preceding page.
Pin
No.
Pin name
DC
voltage
AC
voltage
Function
Equivalent Circuit
22
MUTE DET
Playback self-muting detection filter
connection.
23
FSC IN
1.8V
FSC input. The input level is 300 to
400mVp-p.
24
GND
Ground for blocks that handle high
frequencies (FM).
25
A-SW PULSE
RF switching pulse input.
26
PLL FILTER
1.575V
Record system PLL low-pass filter.
27
LP EMPHASIS
1.575V
Creates the LP emphasis
characteristics (NTSC mode only).
If this pin is pulled to ground, pin 19
will function as the DO and S/H
monitor.
28
NR OUT/S/H OUT
1.575V
In standard
input
mode :
-20dBs
In playback mode : S/H output
In record mode : NR output
Continued on next page.
50k
Ω
20k
Ω
30k
Ω
23
500
Ω
10pF
VCC1
VREF
50k
Ω
100k
Ω
25
VCC1
0.07
μA
0.07
μA
26
200
Ω
80
μA
VCC1
28
VCC1
50
μA
22
16k
Ω
39k
Ω
2k
Ω
VCC1
80
μA
27
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