BA1451F
Audio ICs
FM
AM
8
0
0
9
4.2
4.2
10
1.5
1.5
11
1.5
1.5
12
0
13
GND
10k
Ω
10k
Ω
MUTE
IF OUT
8
4
2
4
9
V
CC
GND
V
CC
GND
5k
Ω
10/11
2
4
23
4
12
AM/FM
82k
Ω
GND
23
4
GND
4k
Ω
13
2.1
V
reg
V
reg
MONO
2.1
2.1
Pin No.
Function
Internal circuit
Quiescent pin voltage (V)
· IF request
Output the IF signal to pin9 excess
of 4.0V.
Stops the IF signal at equal to or less
than 3.0V.
· MUTE
Apply to muting excess of 2.0V.
Off the muting at equal to or less
than 1.0V.
IF output
Output for the IF signal.
R-channel output
L-channel output
· PLL filter
Connect to a lag/lead filter.
· AM / FM band switch
AM band when connected to GND.
· Forced monaural
Forced monaural operation connecting
to get a resistor to mediate.
(Recommended value : 10k
Ω
to
ground.)
· Pilot filter
Connect to a capacitor.
