Power Down Mode Behavior

TS615

29/36

to this signal. This concept is particularly intended for the ADSL-over-voice modems, where the modem in

sleep mode, and must be woken up by the phone call.

Figure 67. Matching in sleep mode

Figure 68. Standby mode. Time On

>Off

Figure 69. Standby mode. Time Off

>On

TS615

1:2

Transformer

Line (100

Ω)

Consumption=80

µA

POWER DOWN

25

Ω

12.5

Ω

12.5

Ω

5

Ω max.

The system can be waked-up

from the line

Matching

TS615

1:2

Transformer

Line (100

Ω)

Consumption=80

µA

POWER DOWN

25

Ω

12.5

Ω

12.5

Ω

5

Ω max.

The system can be waked-up

from the line

Matching

0

1020

304050

-6

-5

-4

-3

-2

-1

0

Vout

Vpdw

Disabled Output

Enabled Output

Time (

012

345

−6

−5

−4

−3

−2

−1

0

1

Disabled Output

Enabled Output

Vpdw

Vout

Time (µs)

10k

100k

1M

10M

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

Frequency (Hz)