le5712 Zarlink Semiconductor, le5712 Datasheet - Page 15

• Manufacturer Part Number: le5712
• Description: Dual Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

Test Circuits
V
Figure 3. Four-to-Two Wire Insertion Loss and Balance Return Signals
AB
R
V
R
2
2
L
L
L
R
R
G
L
R
L
I
I
L
G
Figure 2. Two-to-Four Wire Insertion Loss
V
I
I
AD
BD
AB
Figure 1. Feed Programming
BRS = 20 log(V
AD
BD
I
AD
BD
L4-2
AD
BD
I
L2-4
1
1
i
i
, AD
, BD
= 20 log(V
Zarlink Semiconductor Inc.
1
1
, AD
, BD
= 20 log(V
DSLIC
2
2
DSLIC
DSLIC
2
2
AGND
AB
TX
RSN
RSN
15
AGND
TX
VTX
VTX
/ V
/ V
RSN
RSN
VTX
VTX
/ V
RX
RX
1
2
1
2
AB
)
)
1
2
1
2
CDC
IREF
)
DET
RD
V
V
TX
i
i
TX
C
DC
R
R
T
R
D
R
RX
T
R
RX
R
REF
50 pF
V
RX