Continued from preceding page.
Pin No.
Function
LA1784M
Description
27
MRC control voltage time
constant
The MRC detector time constant
is determined by a 100 Ω resistor
and C2 when discharging and by
the 2-µA current and C2 when
charging.
Equivalent circuit
VCC
2 µA
VCC
C2
27
100 Ω
Pin 28
28
SNC control input
The sub-output is controlled by a
0 to 1-V input.
29
HCC control input
The high band frequency output is
controlled by a 0 to 1-V input.
It can also be controlled by the
MRC output.
Use a resistor of at least 100 kΩ
when controlling with the pin 32
FM S-meter signal.
A11727
VREF
28
A11728
VREF
32
1 µF
29
+
A11729
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No. 6039-11/50