la1845nv Sanyo Semiconductor Corporation, la1845nv Datasheet - Page 5

• Manufacturer Part Number: la1845nv
• Description: Single-chip Home Stereo Ic
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
Pin No.
19
20
21
22
23
24
AM detector output
S meter,
AM AGC
AM RF input
AFC
OSC
Oscillator buffer
output,
FM SD sensitivity
adjustment
Pin function
Pin voltage
1.5V (AM)
0.2V (FM)
0.9V (AM)
V CC -1.4
0V (FM)
Vreg
Vreg
V CC
21
23
Equivalent circuit
LA1845NV
R
R
22
20
24
19
Output impedance r o = 3.3kΩ
The resistance of the built-in resistor R is 13.9kΩ.
The SD response during seek operation is
determined with the external capacitor connected to
this pin.
Must be used at the same potential as pin 22.
The FM SD bandwidth can be adjusted with the
external resistor connected between this pin and
pin 3 (Vreg).
Connect the oscillator coil between this pin and pin
9 (V CC ).
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 R = 200Ω
Note : Resistance of the external resistor
connected to the pin 24 must be 3.3kΩ or higher.
Notes
No.7931-5/10