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MC3372 - Low Power Narrowband FM IF

Description

OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz.

ML3371 at f RF = 10.7 MHz (see Figure 11).

Pin 1 Symbol OSC1 Internal Equivalent Circuit Description The base of the Colpitts oscillator.

Features

  • ttenuated by the filter. The typical level is approximately 50 mVpp. 6 7 DEC1 DEC2 DEC2 IF Decoupling. External 0.1 µF capacitors connected to VCC. 8 Quad Coil 8 Quad Coil VCC Quadrature Tuning Coil. Composite (not yet demodulated) 455 kHz IF signal is present. The typical level is 500 mVpp. 10 50 µA Page 6 of 19 www. lansdale. com Issue A ML3371, ML3372.

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Datasheet Details

Part number MC3372
Manufacturer LANSDALE Semiconductor
File Size 1.39 MB
Description Low Power Narrowband FM IF
Datasheet download datasheet MC3372 Datasheet
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Full PDF Text Transcription

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ML3371 ML3372 Low Power Narrowband FM IF Legacy Device: Motorola MC3371, MC3372 The ML3371 and ML3372 perform single conversion FM reception and consist of an oscillator, mixer, limiting IF amplifier, quadrature discriminator, active filter, squelch switch, and meter drive circuitry. These devices are designed for use in FM dual conversion communication equipment. The ML3371/ML3372 are similar to the Motorola MC3361/MC3357 FM IFs, except that a signal strength indicator replaces the scan function controlling driver which is in the MC3361/MC3357. The ML3371 is designed for the use of parallel LC components, while the ML3372 is designed for use with either a 455 kHz ceramic discriminator, or parallel LC components. These devices also require fewer external parts than earlier products.
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