Silan

Semiconductors

SC6579

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2001.12.30

5

PIN DESCRIPTION

Pin no.

Symbol

Function

1

QUAL

Quality indication output

2

RDDA

RDS data output

3

4

MUX

Multiplex signal input

5

+5 V supply voltage for analog part

6

Ground for analog part (0V)

7

CIN

Subcarrier input to comparator

8

SCOUT

Subcarrier output of reconstruction filter

9

MODE

Oscillator mode/test control input

10

TEST

Test enable input

11

Ground for digital part (0V)

12

+5 V supply voltage for digital part

13

OSCI

Oscillator input

14

OSCO

Oscillator output

15

T57

57 kHz clock signal output

16

RDCL

RDS clock output

QUICK REFERENCE DATA

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

Analog Supply Voltage (pin 5)

3.6

5.0

5.5

V

Digital Supply Voltage (pin 12)

3.6

5.0

5.5

V

Total Supply Current

--

6

--

mA

RDS Input Amplitude (RMS value; pin 4)

1

--

--

mV

HIGH-level Output Voltage for Signals

RDDA, RDCL, QUAL and T57

4.4

--

--

V

LOW-level Output Voltage for Signals

RDDA, RDCL, QUAL and T57

--

--

0.4

V

Operating Ambient Temperature

-40

--

+85

°C

FUNCTION DESCRIPTION

The SC6579 is a demodulator circuit for RDS applications. It contains a 57 kHz bandpass filter and a digital

demodulator to regenerate the RDS data stream out of the multiplex signal (MPX).