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參數資料
| 型號： | LA1845NV |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| 封裝： | 0.275 INCH, SSOP-24 |
| 文件頁數： | 5/10頁 |
| 文件大小： | 535K |
| 代理商： | LA1845NV |
LA1845NV
No.7931-4/10
Continued from preceding page.
Pin No.
Pin function
Pin voltage
Equivalent circuit
Notes
10
AM/FM IF counter
output, output
control switch, mute
switch
0V
V10≤0.5V : Reception state
1.4V≤V10≤2.2V : Muting on
V10≥3.5V : IF counter output and muting on
11
Phase comparator
low-pass filter
(AM/FM switching)
VCC-1.0
The device operates in AM mode when a current of
over 200
A flows from pin. 12.
12
Pilot detector low-
pass filter (Forced
mono) (VCO stop)
VCC-1.0
The device is forced to monaural when a current of
over 50
A flows from this pin.
The VCO is stopped when a current of over 200
A
flows from this pin.
The limit values for the resistor are the same as
those for pin 11.
13
14
L outputs
R outputs
3.2V
Output impedance ro = 3.3k
15
Pilot canceler
output
Vreg
16
Decoder input
Vreg
Inverting input pin
RNF = 20k
17
PLL input
Vreg
Input impedance ri = 20k
18
FM demodulator
output
Vreg+0.7
Output impedance ro = 2.3k
The channel separation can be adjusted with an
external capacitor connected between this pin and
ground.
Continued on next page.
13
(
)
14
16
RNF
15
3
17
18
10
11
12
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