la1845nv Sanyo Semiconductor Corporation, la1845nv Datasheet - Page 4

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

Continued from preceding page.
Pin No.
10
11
12
13
14
15
16
17
18
AM/FM IF counter
output, output
control switch, mute
switch
Phase comparator
low-pass filter
(AM/FM switching)
Pilot detector low-
pass filter (Forced
mono) (VCO stop)
L outputs
R outputs
Pilot canceler
output
Decoder input
PLL input
FM demodulator
output
Pin function
Pin voltage
Vreg+0.7
V CC -1.0
V CC -1.0
Vreg
Vreg
Vreg
3.2V
0V
16
17
Equivalent circuit
LA1845NV
15
(
18
13
14
12
RNF
11
)
3
10
V 10 ≤0.5V : Reception state
1.4V≤V 10 ≤2.2V : Muting on
V 10 ≥3.5V : IF counter output and muting on
The device operates in AM mode when a current of
over 200µA flows from pin. 12.
The device is forced to monaural when a current of
over 50µA flows from this pin.
The VCO is stopped when a current of over 200µA
flows from this pin.
The limit values for the resistor are the same as
those for pin 11.
Output impedance r o = 3.3kΩ
Inverting input pin
RNF = 20kΩ
Input impedance r i = 20kΩ
Output impedance r o = 2.3kΩ
The channel separation can be adjusted with an
external capacitor connected between this pin and
ground.
Notes
Continued on next page.
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