6-3
6-3
INTERNAL BLOCK DIAGRAM
RDS/RBDS DEMODULATOR - IC SAA6581T
BLOCK DIAGRAM
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
VDDA
VSSA
Vref
+
5 V
+
5 V
C2
100 nF
C4
47 pF
C5
56 pF
C7
100 nF
C3
2.2
µ
F
5
6
VSSD
11
3
TCON
CIN
SCOUT
15
8
7
MODE
VDDD
9
OSCI
Q1
OSCO
QUAL
RDDA
RDCL
SYNC
13
14
12
16
10
2
1
MHB899
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
Vref
MPX
VDDA
VSSA
CIN
SCOUT
RDCL
TCON
OSCO
OSCI
VDDD
VSSD
SYNC
MODE
SAA6581T
PIN DESCRIPTION
RDS/RBDS DEMODULATOR - IC SAA6581T
INTERNAL BLOCK DIAGRAM
POSITIVE VOLTAGE REGULATOR - IC KA7805
www.freeservicemanuals.info
9/3/2014
Global electronic heritage manuals
Содержание FWM37/21/22/25/37
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