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MC3359 - HIGH GAIN LOW POWER FM IF

General Description

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.

oscillator combination converts the input frequency (10.7 MHz) d

Key Features

  • e desired audio frequencies. This “noise band” is monitored by an active filter and a detector. A squelch.
  • trigger circuit indicates the presence of noise (or a tone) by an output which can be used to control scanning. At the same time, an internal switch is operated which can be used to mute the audio.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Order this document by MC3359/D Low Power Narrowband FM IF . . . includes oscillator, mixer, limiting amplifier, AFC, quadrature discriminator, op/amp, squelch, scan control, and mute switch. The MC3359 is designed to detect narrowband FM signals using a 455 kHz ceramic filter for use in FM dual conversion communications equipment. The MC3359 is similar to the MC3357 except that the MC3359 has an additional limiting IF stage, an AFC output, and an opposite polarity Broadcast Detector. The MC3359 also requires fewer external parts. For low cost applications requiring VCC below 6.0 V, the MC3361BP,BD are recommended. For applications requiring a fixed, tuned, ceramic quadrature resonator, use the MC3357.