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TERMINAL INTERFACE
PIN NAME
1
IF VCC
A Vcc terminal for the IF circuit.
Supply 5V.
2
RIPPLE
A terminal should be connected to an internal
FILTER
bias filler. Put a capacilor.
3
SIF OUT
An output terminal for a 2'nd SIF signal, that
is mixed down by a regenerated carrier.
The SIF frequencies are able to convert into
only 6.5MHz, in order to eliminate SIF BPFs
to single 6.5MHz.
4
AUDIO OUT
An output terminal for audio signal.
FM Det.signal, inputted to pin53, is output.
An internal audio attenator controls the output
levels.
5
IF GND
The GND terminal for IF circuit.
6
IF IN
Input terminals for IF signals. Pin 6 and 7 are
7
IF IN
the both input poles of a differential amplifier.
The normal input level is 90dB( V )( Pin6-7),
input impedance is 1.5 k ohms.
All manuals and user guides at all-guides.com
FUNCTION
- 2 -
APPENDIX
IC DESCRIPTION
INTERFACE
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