TS615

Power Down Mode Behavior

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9 Power Down Mode Behavior

appear when used in differential mode. Nevertheless, when used in single-ended mode on a load

As shown in Figure 66, the interest of having an output short-circuit in power-down mode is to keep the

best impedance matching between the system and the twisted pair telephone line when the modem is in

sleep mode. By doing this, the modem can be woken up with a signal from the line without any damage

Figure 66. Equivalent schematic

.

+

_

..

Ouput 1

.

+

_

.

..

Ouput 2

.

A2

-Vcc

POWER

DOWN

pin6

-Vcc

A1

1

..

4

5

2

3

12

11

10

13

14

POWER

DOWN

pin6