TDA7421 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7421' PDF : 38 Pages View PDF
TDA7421
AM TEST CIRCUIT
VMIX1AMIN
15pF
VXTAL
15pF
VMiXOUT
330
T2
VMiX2AMIN
T3
VCC
12
2K
VCC
64 63 61
60 58
57 55
54
AGC
W&N
1
2
35
2K
34
11
1M
12
+-
AGC2
DET
33
40
VAMSD
41
VAMSMETER
31
32
2
1
VIF2AMPIN
VIF2AMPOUT
D97AU803A
FM TEST CIRCUIT
VMiXFMIN
T1
1:3.5
VTun
T2
VCC
3
61
VTun
5K
V1
L2
22pF
1.8K
4
8
15pF
9
68pF
330
VMIXOUT
VFMIFAGCIN
10nF
10nF
VFMAMP1OUT
10nF
10nF
330
10nF
VFMAMP2OUT
10nF
330
10nF
60
59
53 52
51
330
330
-
+
50 49
48
330
330
-
+
46
330
45
10nF
10nF
VFMLIMIN
VFMRFAGCIN
VFMAGCOUT
10nF
10nF
5
FM AGC
6
AUDIO
38
DEMOD
L6
37
14
15
16
40
41
39
42
31
VAMTADJ VRFADJ VPLLOUT VFMSD VSMSHIFT VAUDIO
100K
VMUTEDRIVE
10nF
VSMFILT
D97AU804A
14/38
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