Pin Description
Pin
Symbol
No.
Pin voltage (V)
FM AM
Equivalent circuit
CXA1991N
(VCC=3 V, Ta=25 °C)
Description
220k
1 AM IF IN 1.1 1.1
1
AM IF input pin.
2 AGC
0.3 0.4
2
130 100k
130
Connected to a capacitor.
9
9 DET OUT 0.9 0.7
Detection output pin.
3 FM IF IN 1.1 0
4 BAND
1.1 0
5 GND2
0
0
6 DISCRI
2.0 2.4
VCC
330
3
VCC
4
VCC
6
2k
1.1k
FM IF input pin.
AM/FM band switching pin.
AM when grounded, FM when
open.
IF system ground.
Connected to phase shift circuit
and ceramic discriminator.
7 VCC
3.0 3.0
—2—