參數(shù)資料
型號: LA1787M
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Tuner IC for Car Radios
中文描述: 單芯片調(diào)諧器IC的汽車收音機
文件頁數(shù): 18/54頁
文件大?。?/td> 606K
代理商: LA1787M
No. 6655-18/54
LA1787M
Pin No.
Function
Description
Equivalent circuit
59
60
63
O S C
64
1ST.IF
30
VCC
C1
C2
5pF
5pF
RF AMP
620
620
VCC
A13593
+
3
6
+
FM.F.E
AGC
AM/FM
switching circuit
SD
VCC
510
100k
3.3V
GND
A13594
8V
62
AM 1st
MIX
to RF
Amp.
10k
2.1V
A13595
10
10k
5.6V
20pF
33pF
X tal
to 2nd
MIX
A13596
Continued from preceding page.
Double balanced mixer
Pins 59 and 60 are the mixer
10.7-MHz output
59
60
Mixer output
Pins 63 and 64 are the mixer
input.
This is an emitter insertion type
circuit, and the amount of
insertion is determined by the
capacitors C1 and C2.
63
64
Mixer input
Note:The lines for pins 63 and 64
must be kept separated from
the lines for pins 59 and 60.
Pin 6 functions both as the FM
front end V
CC
and the AM/FM
switching circuit.
6
Front end V
CC
AM/FM
switching
1st MIX
INPUT
First mixer input
The input impedance is about
10 k
.
62
Crystal oscillator circuit
The Kinseki, Ltd. HC-49/U-S and
a C
L
of 20 pF must be used.
10
AM 2nd OSC
V6 voltage
When 8 V
FM
OPEN
AM
Mode
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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