E-TDA7421N 查看數據表（PDF） - STMicroelectronics
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E-TDA7421N Datasheet PDF : 47 Pages
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TDA7421N
2
Pin description
Figure 2. Pin connection (top view)
Pin description
AM MIX1 IN -
AM MIX1 IN +
FM MIX IN -
FM MIX IN +
FM RF AGC IN
FM AGC OUT
RF GND
VCO B
VCO E
OSC GND
XTAL D
XTAL G
OSC VCC
FM ANT ADJ
FM RF ADJ
PLL VCC
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
FM IF AMP2 OUT
IF1 VCC
FM LIM IN +
FM LIM IN -
IF1 GND
FM BW TC
FM MUTE DRIVE
FM SMETER AM SMETER
FM DET ADJ
FM SD AM SD
AUDIO OUT
FM QUAD+
FM QUAD-
IF2 VCC
AM IF2 IN
AM REF
AM BPF
D98AU909
Table 2.
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin description
Pin name
Function
AM MIX1 IN -
AM MIX1 IN +
AM 1st mixer negative input (differential -)
AM 1st mixer positive input (differential +)
FM MIX1 IN - FM mixer negative input (differential -)
FM MIX1 IN + FM mixer positive input (differential +)
FM RF AGC IN RF AGC input
FM AGC OUT FM AGC output voltage
RF GND
RF ground
VCO B
Local oscillator input to the transistor base
VCO E
Local oscillator input to the transistor emitter
OSC GND Oscillator ground
XTAL D
Crystal oscillator MOS amplifier output
XTAL G
Crystal oscillator MOS amplifier input
OSC VCC Oscillator positive supply
FM ANT ADJ Tuning varicap voltage for antenna FM filter
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