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SAA6579T-X (IC51) : RDS detector
1. Pin layout
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
3. Block diagram
ANTI-
ALIASING
MUX
4
FILTER
8
SCOUT
CLOCKED
CIN
7
COMPARATOR
VDDA
5
REFERENCE
Vref
3
VOLTAGE
6
VSSA
2. Pin function
Pin
Symbol
No.
1
QUAL
2
RDDA
3
Vref
4
MUX
5
VDDA
6
VSSA
7
CIN
8
SCOUT
9
MODE
10
TEST
11
VSSD
12
VDDD
13
OSCI
14
OSCO
15
T57
16
RDCL
57kHz
BANDPASS
RECONSTRUCTION
(8th ORDER)
COSTAS LOOP
VARIABLE AND
FIXED DIVIDER
Vp1
CLOCK
REGENERATION
AND SYNC
Function
Quality indication output
RDS data output
Reference voltage output (0.5VDDA)
Multiplex signal input
+5V supply voltage for anarog part
Ground for analog part (0V)
Subcarrier input to comparator
Subcarrier output of reconstruction filter
Oscillator mode / test sontrol input
Test enable input
Ground for digital part (0V)
+5V supply voltage for digital part
Oscillator input
Oscillator output
57kHz clock signal output
RDS clock output
OSCI
OSCO
13
14
OSCCILLATOR
AND
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
9
10
MODE
TEST
KD-SH77R/KD-SH55R
VDDD
12
QUAL
QUALITY BIT
1
GENERATOR
RDDA
DIFFERRENTIAL
2
DECODER
16
RDCL
T57
15
11
VSDD
1-33
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