522 - 05 - 02

8

could be significantly less than the default signal detection

level set by the on chip reference.

The CD/Mute pin is a multi-function bidirectional pin that

provides the following functions:

•

Applying a HIGH INPUT to the CD/Mute pin forces the

GS1504 outputs to a muted condition. See the DC

electrical characteristics table for voltage level. In this

condition the outputs will be latched to the last logic

level present at the output.

•

Applying a LOW INPUT to the CD/Mute pin will force the

GS1504 outputs to remain active regardless of the

length of input cable and the voltage applied to the

MCLADJ pin. See the DC electrical characteristics table

for voltage level.

•

When used as an OUTPUT, the CD/Mute pin will provide

an indication of the output mute status. The CD/Mute pin

will be logic HIGH when the output is muted, and logic

LOW when the outputs are not muted.

TYPICAL APPLICATION CIRCUIT

CLI

SDI

SDI

MCLADJ

NC

CD/MUTE

SDO

SDO

NC

NC

10n

4µ7

4µ7

10n

1µ

100n

1n

10n

2k

10k

15k

10n

47p

47p

75

75

10nH

37.5

+

+

GS1504

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

All resistors in ohms,

all capacitors in farads,

unless otherwise shown.

J3

2

1