LA1844M Datasheet, PDF (8/11 Pages) Sanyo Semicon Device – For Home Stereo Single-chip Tuner IC

Continued from preceding page.
Pin No.
Function
21 AM RF input
Pin voltage
(V)
Vreg
LA1844,LA1844M
Equivalent circuit
Notes
Must be used at the same potential as pin 22
22 AFC
Vreg
23 OSC
VCC
24 Oscillator buffer
output,
FM SD sensitivity
adjustment
VCC-1.4
The FM SD bandwidth can be adjusted with the
external resistor connected between this pin and
pin 3 (REG)
Connect the oscillator coil between this pin and
pin 9 (VCC)
Note: Impedance of the secondary oscillator coil
must be 5kΩ or higher.
The FM SD sensitivity can be adjusted with an
external resistor connected to this pin.
Output impedance RO = 200Ω
Note: Resistance of the external resistor
connected to the pin 24 must be 3.3kΩ
or higher.
No.7930A-8/11