LA1787M
Continued from preceding page.
Pin No.
Function
Description
Equivalent circuit
30k ?
R
47
VCC
47
FM muting on level
adjustment
Modify the value of the external
resistor to adjust the muting on
level.
Pin 24
140 μ A
Inverter
MUTE
A13586
VCC
RF AGC rectification capacitor
5.6V
10k ?
48
57
RF AGC bypass
RF AGC
The low frequency distortion is
determined as follows:
Increasing C48 and C57 improves
the distortion but makes the
response slower.
+
3.3 μ F
48
+
Antenna
damping
Reducing C48 and C57
aggravates the distortion but
makes the response faster.
For AGC use
57
+
47 μ F
A13587
2.6V
Due to the high gain of the limiter
10k ?
10k ?
50
51
IF bypass
FM IF input
amplifer, care must be taken when
choosing the grounding point for
the limiter amplifer input capacitor
to prevent oscillation.
0.022 μ F
330 ?
50
51
IF in
A13588
2k ?
100 ?
52
IF input
The input impedance is 2 k ? .
52
A13589
Continued on next page.
No. 6655-16/54
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相关代理商/技术参数
LA1787NM 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC
LA1787NM_09 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC
LA1787NM-MPB-E 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:ON Semiconductor 功能描述:FTRAY / ANALOG CAR RADIO TUNER
LA1787NM-TLM-E 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / ANALOG CAR RADIO TUNER
LA17B-10H 制造商:LIGITEK 制造商全称:LIGITEK electronics co., ltd. 功能描述:LED ARRAY
LA17B-5H 制造商:LIGITEK 制造商全称:LIGITEK electronics co., ltd. 功能描述:LED ARRAY
LA1800 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM/AM Single-Chip Radio
LA1805 制造商:Panasonic Industrial Company 功能描述:IC