July 1993

4

Philips Semiconductors

Product specification

Terrestrial Digital Sound Decoder (TDSD2)

SAA7282

PINNING

SYMBOL SOT205AG

SOT232A

DESCRIPTION

DOBM

1

28

digital audio interface output

2

29

ground connection for the digital section

n.c.

3

−

not connected

XIN

4

30

crystal input at 256fs (8.192 MHz)

XOUT

5

31

crystal output at 256fs (8.192 MHz)

DATA

6

32

serial data input at 728 kbits/s from DQPSK demodulator

PCLK

7

1

output clock at 728 kHz to DQPSK demodulator

RESET

8

2

active LOW reset; used to set the device in a valid initial condition

SCL

9

3

SDA

10

4

PORT2

11

5

n.c.

12

−

not connected

ADSEL

13

6

slave addresses, defaults to logic 1

MUTE

14

7

active LOW mute input; when set LOW, sets the digital data to zero and either

silences the output or switches it to analog FM, depending on the status of

(if automute is used, then MUTE is automatically pulled LOW)

n.c.

15 to 17

−

not connected

18

8

analog supply voltage for the right audio channel

19

9

analog ground connection for the right audio channel

VRO

20

10

internal reference voltage buffer output

VRC

21

11

internal reference voltage buffer HIGH impedance node

n.c.

22

−

not connected

OPR

23

12

analog output from the right audio channel

EXTR

24

13

external analog input to the right audio channel

FMR

25

14

FM sound input to the right audio channel

INTR

26

15

integrator output from the right audio channel

CDR

27

16

integrator connection to an external damping capacitor

n.c.

28

−

not connected

29

17

reference voltage input; 2.5 V (typical)

30

18

CDL

31

19

integrator connection to an external damping capacitor

INTL

32

20

integrator output from the left audio channel

FML

33

21

FM sound input to the left audio channel

EXTL

34

22

external analog input to the left audio channel

OPL

35

23

analog output from the left audio channel

n.c.

36

−

not connected

37

24

analog ground connection for the left audio channel

38

25

analog supply voltage for the left audio channel