LUCL9310AP-D AGERE [Agere Systems], LUCL9310AP-D Datasheet - Page 46
LUCL9310AP-D
Manufacturer Part Number
LUCL9310AP-D
Description
Line Interface and Line Access Circuit Full-Feature SLIC,Ringing Relay,and Test Access Device
Manufacturer
AGERE [Agere Systems]
Datasheet
1.LUCL9310AP-D.pdf
(60 pages)
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Full-Feature SLIC, Ringing Relay, and Test Access Device
First-Generation Codec ac Interface Net-
work: Resistive Termination
The following reference circuit shows the complete
SLIC schematic for interface to the Agere T7504 first-
generation codec for a resistive termination imped-
ance. For this example, the ac interface was designed
for a 600
with transmit gain and receive gain set to 0 dBm. For
illustration purposes, no PPM injection was assumed in
this example. This implies use of the default overhead
voltage and no components for meter pulse rejection.
Also, this example illustrates the device with a single
battery operation and fixed overhead, current limit, and
loop closure threshold. This is a lower feature applica-
tion example.
46
46
V
S
Z
T/R
Z
T
resistive termination and hybrid balance
+
–
I
V
T/R
R
R
T/R
P
P
RING
TIP
SWITCH
SWITCH
BREAK
BREAK
18
18
CURRENT
SENSE
20
20
Figure 15. ac Equivalent Circuit
A
A
V
V
= 1
= –1
–0.300 V/mA
L9310
A
V
= 4
Resistor R
match of input bias voltage at the RCVN/RCVP inputs.
If it is not used, there may be a slight offset at tip and
ring due to mismatch of input bias voltage at the
RCVN/RCVP inputs. It is very common to simply tie
RCVN directly to ground in this particular mode of oper-
ation. If used, to calculate R
RCVN to ac ground should equal the impedance from
RCVP to ac ground.
VITR
–
+
RCVN
V
RCVP
REF
GN
V
REF
is optional. It compensates for any mis-
R
R
GP
R
R
T3
RCV
T6
R
HB1
GN
, the impedance from
VFR
VF
VF
X
X
1/4 T7504 CODEC
IN
IP
Agere Systems Inc.
–
+
R
X
2.4 V
July 2001
12-3580B (F)
VGSX
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