MC3371 Datasheet, PDF (4/20 Pages) Motorola, Inc – LOW POWER FM IF

MC3371 MC3372
Figure 2. MC3372 Functional Block Diagram and Test Fixture Schematic
RF Input
RSSI Output
VCC = 4.0 Vdc
C1
0.01
51 k
0.1
51
Mute
SqIn FilterOut
FilterIn
1.0 µF
1.0 µF 470
510 k
0.01
8.2 k
16
15
14
13
Squelch Trigger
with Hysteresis
Mixer
Oscillator
1
2
3
4
15
22
57.6575
MHz
0.33
0.001
muRata
CFU455D2
or
equivalent
12
11
10
9
Filter ^–
Amp
AF
+
Amp
Limiter
Amp
Demodulator
10
53 k
5
6
7
C13
R10
0.1
1.8 k
R11
C12
51 k
0.1
8
C14
27
R12
4.3 k
C15
0.1
AF Out
to Audio
Power Amp
Ceramic
Resonator
muRata
CDB455C16
4
MOTOROLA ANALOG IC DEVICE DATA