AN7243S
s
Pin Descriptions
Pin No.
1
Pin Name
Oscillation Emitter
Typ. Waveform
Description
Oscillation transistor's emitter pin
108.7MHz
ICs for FM/AM Tuner
Equivalent Circuit
2
1
2
Oscillation Base
108.7MHz
Oscillation transistor's base pin
3
V
CC
DC
8V
Main circuit V
CC
V
CC
4
OSC Output
108.7MHz
Output oscillation signal to
microcomputer through buffer.
4
6.6V
≅70µA
5
AGC Output
≅
0V
Output AGC signal according to
Mix. output dimensions.
5
6
AGC-Amp. Gain
Adjustment
DC
0.8V
Adjust AGC-Amp. gain by external
resistance.
(Refer to P.275 AGC circuit.)
6
7
IF Amp. Output
10.7MHz
IF signal (10.7MHz) output pin
Z
out
≅
330Ω
+
–
7
8
IF Amp. By-pass
DC
3.2V
IF amp. by-pass control
9
330Ω
8
9
IF Amp. Input
10.7MHz
IF signal (10.7MHz) input pin
10
Mix. Output
11
10
10.7MHz
11
Convert RF signal to IF signal and
output.
10.7MHz
Note) Typical waveform frequency is the value when tuning receiving frequency to 98.0MHz.
PANASONIC [ PANASONIC SEMICONDUCTOR ]
