LA1845N Datasheet, PDF (6/10 Pages) Sanyo Semicon Device – Single-Chip Home Stereo IC

Continued from preceding page.
Pin No.
Pin function
Pin voltage
LA1845N, 1845NM
Notes
21
AM RF input
Vreg
Must be used at the same potential as pin 22
Equivalent circuit
21
A10653
The FM SD bandwidth can be adjusted with the
22
AFC
Vreg
external resistor connected between this pin and
22
pin 3 (Vreg)
23
OSC
Vcc
Oscillator buffer
output,
24
Vcc - 1.4
FM SD sensitivity
adjustment
23
Connect the oscillator coil between this pin and
pin 9 (Vcc)
Note: Impedance of the secondary oscillator coil
must be 5 kΩ or higher.
The FM SD sensitivity can be adjusted with an
external resistor connected to this pin.
Output impedance r_o = 200 Ω
Note: Resistance of the external resistor
connected to the pin 24 must be 3.3 kΩ or higher.
A10655
R
24
A10656
No. 5888-6/10