参数资料
型号: LA1844
元件分类: 调谐器
英文描述: 2-BAND, AUDIO TUNER, PDSO24
封装: 0.300 INCH, MFP-24
文件页数: 9/11页
文件大小: 821K
代理商: LA1844
LA1844,LA1844M
No.7930A-7/11
Continued from preceding page.
Pin No.
Function
Pin voltage
(V)
Equivalent circuit
Notes
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.
13
14
L outputs
R outputs
3.2
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.
19
AM detector
output
0 (FM)
1.5 (AM)
Output impedance RO = 3.3k
20
S meter,
AM AGC
0.2 (FM)
0.9 (AM)
The resistance of the built-in resistor R is 13.9k
The SD responce during seek operation is
determined with the external capacitor connected
to this pin.
Continued on next page.
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