Order this document by MC3335/D
Low Power Narrowband FM Receiver
. . . includes dual FM conversion with Oscillators, Mixers, Quadrature
Discriminator, and Meter Drive/Carrier Detect Circuitry. The MC3335 also
has a comparator circuit for FSK detection.
Complete Dual Conversion Circuitry Low Voltage: VCC = 2.0 to 6.0 Vdc Low Drain Current (Typical 3.6 ...