BA1451F
Audio ICs
FM
AM
14
15
16
17
0
0
18
5.0
5.0
19
5.0
5.0
20
2.1
2.1
2
23
14
4
15
100k
Ω
V
CC
V
reg
GND
20k
Ω
5k
Ω
V
CC
GND
2
4
16
2
4
17
20k
Ω
V
CC
GND
2
18
4
V
CC
GND
2
23
20
4
19
V
CC
V
reg
GND
30k
Ω
2.1
2.1
2.1
2.1
2.1
2.1
3k
Ω
Pin No.
Function
Internal circuit
Quiescent pin voltage (V)
MPX input
Input the FM detector output .
MPX input
Input the AM detector output after
low cut.
AM/FM detector output
Connect to the following stage MPX and
FM low pass filter.
AM AGC
Connect to a capacitor.
AM IF input
Connect to an AM ceramic filter.
AM mixer output
Connect to primary side of AM IFT.
AM antenna
Connect to AM antenna.
