LA1781M_09 Datasheet, PDF (18/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

Block Diagram
LA1781M
VCC
GND
0.022μF
TO AM STEREO
(IF OUT)
+
10kΩ
+
+
+
+
0.022μF
30Ω
620Ω
0.022μF
1MH
100μH
100μH
30MH
0.022μF
FC18
+
ANTD
0.022μF
510kΩ
RFAGC
240kΩ
48 47 46 45 44 43 42 41 40
49
FM IF IN
50
0.022μF _220Ω
51
100Ω
AM IF IN ₅₂
53
FM IF OUT
ANT
D
OSC
BUFF
OSC
BUFF
DET
IF
AGC
L.C.
IF limiter
amplifier
AMVSM
AM SD
FMVSM
FM SD
IF BUFF
300Ω
2kΩ
54
AM SD ADJ
AM MIX OUT
55
20kΩ FM WB AGCIN
FE IF IN
56
200kΩ
0.022μF
VCC 30Ω
57
62pF
58
MUTE ATT
59
60
MIX +
RF AGC
WB AGC
TWEET
IF AM/FM
REG SW
AM FM
VREF
SEEK
SW
W.B.AGC
RF AGC
SD/ST
IND
KEYED
AGC
22pF 22pF
VCC
30Ω
1000pF
1000pF
FEVCC ₆₁
MIX
AM/FM
0.022μF
62
8pF
63
5pF
64
5pF
ANT
D
BUFF
BUFF
AM
1ST
OSC
NOISE
AMP
AMP
PICAN
INPUT
AGC TRIG GATE
COUNTER
1
2
3
4
5
6
7
8
9
GND _0.1μF
30kΩ
200kΩ
100Ω
0.022μF
GND
18pF
30kΩ
10pF
+
5pF
300pF
30kΩ
+
0.1μF _10kΩ
MUTE DRIVE
39 38 37 36 35 34 33
1μF _1kΩ
Q.DET
MUTE
AMP
HOLE
DET
MUTE
DRIVE
DC-C AFC
DET CLAMP
MRC
SNC
HCC
VCO
STOP
FF
19k<90k
MAIN
HC
AMP
INPUT
FF
19k<0
PHASE
COMP
VCO
HPF
LPF
PILOT
DET
TRIG
-- +
FF
38k<0
P-CAN
FF
SUB MAT
DEC RIX
10 11 12 13 14 15 16
AM
MPX
OSC
+
6800pF 0.01μF
OUT
FM 100kΩ
32
METER _50kΩ
DET OUT
31
AM LEVEL ADJ
+
8200pF AM HC
30
NC-IN
1μF
29 ^HCC
SNC
28
1μF
27
10kΩ
26
GND
25
AM/FM
S-METER ^0.47μF
5V
24
23
22 ^5.6kΩ
+
+
21 _1μF
0.22μF
CSB912JF104
20
0.047μF 20kΩ
19
SEP.ADJ
18
100kΩ
17
0.01μF
PI.CAN ADJ
10.26MHz
NC MPX GND
18pF
10μF
10μF
SEEK→AM/FM SD
STOP→FM ST IND.
10μF
R
L
10μF
0.22μF
10kΩ 2.2kΩ 1μF
0.01μF 3SK583
10kΩ
10μF
22pF
7.2MHz
0.22μF 100pF 100pF 100pF 100pF
20
19
18
17
16
15
14
13
12
11
VSS PD VDD FM IN AM IN
LC7216M
22pF
CE
CI
CL DO
FM/AM
1
2
3
4
5
6
7
8
9
10
100pF
+B
12V
+
5.6V
+
9.1V
CE
CI
CL DO
RDS
ADC MUTE SD/MONO
ST
R ON
LC867148
No.6038-18/48