le79489 Zarlink Semiconductor, le79489 Datasheet - Page 13

• Manufacturer Part Number: le79489
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

TEST CIRCUITS
R
R
2
2
V
L
L
L
A. Two- to Four-Wire Insertion Loss
L-T Long. Bal. = 20 log (V
L-4 Long. Bal. = 20 log (V
V
AB
I
L2-4
S2 Open, S1 Closed
A(TIP)
B(RING)
= –20 log (V
SLIC
AGND
ωC
1
VTX
RSN
S1
<< R
V
TX
L
/ V
AB
TX
L
C
AB
/ V
/ V
)
L
L
V
)
)
L
R
R
2
2
L
L
C. Longitudinal Balance
R
R
T
V
RX
AB
Zarlink Semiconductor Inc.
A(TIP)
B(RING)
SLIC
V
13
AB
AGND
4-L Long. Sig. Gen. = 20 log (V
VTX
RSN
B. Four- to Two-Wire Insertion Loss
S2 Closed, S1 Open
R
L
I
L4-2
R
S2
A(TIP)
B(RING)
T
= –20 log (V
SLIC
R
RX
AGND
L
VTX
RSN
/ V
RX
AB
)
V
/ V
RX
RX
)
R
R
T
RX
V
RX