The MC3359 is a low–power FM IF circuit designed primarily for use in voice–communication scanning receivers. It is also finding a place in narrowband data links. In the typical application (Figure 1), the mixer–oscillator combination converts the input frequency (10.7 MHz) down to 455 kHz, where, a.
2.0 µV (Typical) Low Number of External Parts Required For Low Voltage and RSSI, use the MC3371
P SUFFIX PLASTIC PACKAGE CASE 707
DW SUFFIX PLASTIC PACKAGE CASE 751D (SO
–20L)
ORDERING INFORMATION
Device MC3359DW MC3359P Operating Temperature Range TA =
–30 to +70°C Package
Figure 2. Pin Connections and Functional Block Diagram
Mixer
SO
–20L Plastic DIP
Crystal Osc.
2 Mixer Output VCC Limiter Input Decoupling
Oscillator
1
18
RF Input Gnd Audio Mute Scan Control Squelch Input Filter Output Filter Input Demod Output Recovered Audio
17
Broadcast Detector
3 1.8 k 4 Limiter 5 1.8 k
16.
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