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參數資料
| 型號： | LA1845NM |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 6/10頁 |
| 文件大小： | 190K |
| 代理商： | LA1845NM |
Continued from preceding page.
No. 5888-5/10
LA1845N, 1845NM
Pin No.
Pin function
Pin voltage
Notes
Equivalent circuit
VCC – 1.0
Pilot detector low-
pass filter (Forced
mono) (VCO stop)
12
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.
12
A10642
3.2 V
L outputs
R outputs
13
14
Output impedance ro = 3.3 k
13
14
A10647
(
)
Vreg
Pilot canceler
output
15
3
A10645
Vreg
Decoder input
16
Inverting input pin
RNF = 20 k
16
RNF
Vreg
PLL input
17
Input impedance ri = 20 k
17
Continued on next page.
Vreg + 0.7 (FM)
Vreg + 0.7 (AM)
FM demodulator
output
18
Output impedance ro = 2.3 k
The channel separation can be adjusted with an
external capacitor connected between this pin and
ground.
18
A10649
0 V (FM)
1.5 V (AM)
AM detector
output
19
Output impedance ro = 10 k
100V
19
0.2 V (FM)
0.9 V (AM)
S meter,
AM AGC
20
The resistance of the built-in resistor R is 13.9 k
The SD responce during seek operation is
determined with the external capacitor connected
to this pin.
20
A10651
R
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