la1862m Sanyo Semiconductor Corporation, la1862m Datasheet - Page 16

• Manufacturer Part Number: la1862m
• Description: Single-chip Tuner System For Car Stereo
• Manufacturer: Sanyo Semiconductor Corporation

MPX Block
1.
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9.
10. When adjusting the pilot cancel signal output, connect a 20 kHz lowpass filter (for example, a DIN audio filter) to the
11. The capacitor connected to pin 34 is used to detect the pilot cancel signal. It should be connected to V
Coil Specifications
Note: The dotted lines in the characteristics diagrams on the following pages represent device operation outside the device
The variable resistor between pins 26 and 28 is for
adjusting separation.
The ceramic oscillator must be a Murata F23. The use of
other oscillators leads to frequency discrepancies and
spurious oscillations.
Pin 14 is the SNC control input. It uses the S-meter output
from pin 1 to automatically vary the stereo separation with
the input signal strength. It is also possible to reduce noise
resulting from weak stereo signals.
Pin 13 is the HCC control input. It uses the S-meter
output from pin 1 to automatically vary the multiplexer
output high-frequency characteristic with the input signal
strength. The capacitor at pin 12 determines the maximum
attenuation for this band. Too big a capacitance, however,
will degrade music quality and make the audibility
unstable during reception.
Pin 24 is the 19 kHz pilot signal input. Capacitively
couple the 19 kHz component from pin 11 to pin 24.
Pin 25 is the stereo lamp signal. Current flows only for
stereo signals. Leaving the pin open forces monaural
operation.
The VCO always operates during both stereo and monaural
operation.
Pins 15 and 16 are the left- and right-channel outputs. The capacitors at these pins determine the amount of deemphasis —
50 µs using 0.015 µF, and 75 µs using 0.022 µF.
Pin 18 is the pilot cancel signal output. Adjust the variable resistor between pins 17 and 18 to minimize the 19 kHz pilot
signal components in the left- and right-channel outputs for correct channel balance.
multiplexer output to remove the 38 kHz component and prevent its affect on the process of minimizing the 19 kHz
component.
case of V
specifications.
CC
C = 100 pF internal
, use a capacitor with no DC leakage.
C = 100 pF External
(Mitsumi)
For European markets
(Toko)
For European markets
LA1862M
C = 51 pF External
C = 51 pF Internal
For North American and
Japanese markets
For North American and
Japanese markets
(Toko)
frequency
divider
CC
or GND. In the
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