MC3371 Datasheet, PDF (7/20 Pages) Motorola, Inc – LOW POWER FM IF

MC3371 MC3372
MC3371 PIN FUNCTION DESCRIPTION (continued)
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3371 at fRF = 10.7 MHz (see Figure 11).
Internal Equivalent
Pin
Symbol
Circuit
Description
Waveform
9
RA
Recovered Audio. This is a composite
FM demodulated output having signal
and carrier component. The typical
level is 1.4 Vpp.
VCC
200
RAOut
9
100 µA
The filtered recovered audio has the
carrier component removed and is
typically 800 mVpp.
10
FilIn
10
FilterIn
VCC
30 µA
Filter Amplifier Input
11
FilOut
VCC
240 µA
FilterOut
11
Filter Amplifier Output. The typical
signal level is 400 mVpp.
12
SqIn
12
SqIn
Squelch Input. See discussion in
application text.
12 µA
MOTOROLA ANALOG IC DEVICE DATA
7