Philips FWM37 - Page 16

15FW-M37
DIAGRAMA EM BLOCO INTERNO
DEMODULADOR RDS/RBDS - IC SAA6581T
handbook, full pagewidth
57 kHz
8th ORDER
BANDPASS FILTER
CLOCKED
COMPARATOR
RDS/RBDS
DEMODULATOR
SIGNAL QUALITY
DETECTOR
POWER
SUPPLY
AND RESET
TEST
CONTROL
OSCILLATOR
AND CLOCK
MPX
multiplex
input
C1
C6
330 pF
560 pF
4
V
DDA
V
SSA
V
ref
+5 V
+5 V
C2
100 nF
C4
47 pF
C5
56 pF
C7
100 nF
C3
2.2 µF
5
6
V
SSD
113
TCON
CINSCOUT
15
87
MODE
V
DDD
9
OSCI
Q1
OSCO
QUAL
RDDA
RDCL
SYNC
13 14
12
16
10
2
1
MHB899
SAA6581T
DIAGRAMA EM BLOCO INTERNO
REGULADOR DE TENSÃO POSITIVA - IC KA7805
DESCRIÇÃO DO PINO
DEMODULADOR RDS/RBDS - IC SAA6581T
PINNING
SYMBOL PIN DESCRIPTION
QUAL 1 signal quality indication output
RDDA 2 RDS data output
V
ref
3 reference voltage output (
1
/
2
V
DDA
)
MPX 4 multiplex signal input
V
DDA
5 analog supply voltage (5 V)
V
SSA
6 analog ground (0 V)
CIN 7 comparator input
SCOUT 8 switched capacitor filter output
MODE 9 oscillator frequency select input
SYNC 10 ARI clamping control input
V
SSD
11 digital ground (0 V)
V
DDD
12 digital supply voltage (5 V)
OSCI 13 oscillator input
OSCO 14 oscillator output
TCON 15 test control input
RDCL 16 RDS clock output
MHB900
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
QUAL
RDDA
V
ref
MPX
V
DDA
V
SSA
CIN
SCOUT
RDCL
TCON
OSCO
OSCI
V
DDD
V
SSD
SYNC
MODE
SAA6581T