KD-S7R
1-26
QUAL
RDDA
RDCL
T57
VSDD
TEST
MODE
VSSA
OSCI
OSCO
VDDD
SCOUT
MUX
CIN
VDDA
Vref
4
8
7
5
3
6
Vp1
9
10
11
15
16
2
1
13
14
12
ANTI-
ALIASING
FILTER
RECONSTRUCTION
FILTER
OSCCILLATOR
AND
DIVIDER
DIFFERRENTIAL
DECODER
QUALITY BIT
GENERATOR
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
57kHz
BANDPASS
(8th ORDER)
CLOCKED
COMPARATOR
CLOCK
REGENERATION
AND SYNC
REFERENCE
VOLTAGE
COSTAS LOOP
VARIABLE AND
FIXED DIVIDER
SAA6579T-X (IC71) : RDS demodulator
1. Pin layout
2. Pin function
3. Block diagram
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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
QUAL
RDDA
Vref
MUX
VDDA
VSSA
CIN
SCOUT
MODE
TEST
VSSD
VDDD
OSCI
OSCO
T57
RDCL
Pin
No.
Symbol
Function