Philips Semiconductors Product specification
SA615High performance low power mixer FM IF system
1997 Nov 07 6
20
RSSI
OSCILLATOR
LIMITER
19 18 17 16 15 14 13 12 11
10987654321
IF AMP
MINI–CIRCUIT ZSC2–1B
MUTE RSSI
OUTPUT AUDIO UNMUTED
AUDIO
C14
IFT1
C13C12C11C10
C9
C8
C7
C6
R9 R10 R11
X1
R7
30.5
L2
SW3 SW4SW1
VCC
EXT.
LOC
OSC
44.545
45MHZ
R3
R1
R2
SW2
C3 C4
R4
51.1
C5
C2
C1
L1
R6
178 R8
39.2
”C” WEIGHTED
AUDIO
MEASUREMENT
CIRCUIT
45.06
MHZ
50.5
2430
3880
96.5
32.6 71.5
C24 C22 C20 C19
C18
C15
C16
C17
FLT2
SW7 SW6 SW5
SW8
SW9
C23 C21
R17
5.1k
FLT1
–25dB,
1500/50Ω PAD –10dB,
50/50Ω PAD –29dB,
929/50Ω PAD –10.6dB,
50/50Ω PAD –36dB,
156k/50Ω PAD
22pF NPO Ceramic
1nF Ceramic
10.0pF NPO Ceramic
10pF NPO Ceramic
100nF +10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
15nF +10% Ceramic
100nF +10% Monolithic Ceramic
150pF +2% N1500 Ceramic
100nF +10% Monolithic Ceramic
6.8µF Tantalum (minimum) *
C21
C23
C25
Flt 1
Flt 2
IFT 1
L1
L2
X1
R9
R17
R10
R11
100nF +10% Monolithic Ceramic
100nF +10% Monolithic Ceramic
100k +1% 1/4W Metal Film (optional)
100k +1% 1/4W Metal Film (optional)
5.1k +5% 1/4W Carbon Composition
100k +1% 1/4W Metal Film
44.545MHz Crystal ICM4712701
0.8µH TOKO 292CNS–T1038Z
Ceramic Filter Murata SFG455A3 or equiv
Ceramic Filter Murata SFG455A3 or equiv
100nF +10% Monolithic Ceramic
C1
C2
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C17
C18
QUAD
DETECTOR
MUTE
SWITCH
MIXER
700
Automatic Test Circuit Component List
EMITTER BASE
1.3k
51.7
71.5
96.5
32.8
51.5
47pF NPO Ceramic
180pF NPO Ceramic
C26 390pF +10% Monolithic Ceramic
455kHz 270µH TOKO #303LN-1129
300nH TOKO #5CB-1055Z
C26
*NOTE: This value can be reduced when a battery is the power source.
SR00343
Figure 3. SA615 45MHz Test Circuit (Relays as shown)