CXA3107N
Pin Description
Pin
Symbol
No.
Pin voltage
1 IF IN
1.4 V
Equivalent circuit
20k 20k
VCC
1.5k
1.5k
1
Description
IF limiter amplifier input.
2 GND
3 TH CONT
4 FSK REF
5 DISK
6 CHG OFF
—
—
0.2 V
1.4 V
—
GND
Ground.
VCC
Determines the level
comparator threshold value.
The threshold value can be
3
adjusted by inserting the
resistor between Pin 3 and
25k
VCC.
GND
Normally, short to VCC.
VCC
72
4
Connects the capacitor that
determines the low cut-off
frequency for the entire
system.
GND
5
20p
VCC
22k
20k
Connects the phase shifter of
FM detector circuit.
GND
72k
6
20k
100k
Sets off the quick charge
circuit current. The charge
current is off by setting Pin 15
low and Pin 6 high.
GND
—3—