
Data Sheet
September 2001
Full-Feature SLIC and Ringing Relay for TR-57 Applications
L9313 Line Interface and Line Access Circuit
38
Agere Systems Inc.
ac Applications
(continued)
Third-Generation Codec ac Interface Network: Complex Termination
The following reference circuit shows the complete SLIC schematic for interface to the Agere T8536 third-genera-
tion. All ac parameters are programmed by the T8536. Note this codec differentiates itself in that no external com-
ponents are required in the ac interface to provide a dc termination impedance or for stability. Also, this example
illustrates the device using the battery switch with multiple battery operation, programmable current limit, and pro-
grammable loop closure threshold. Please see the T8535/6 data sheet for information on coefficient programming.
12-3527j (F)
Figure 16. L9313 for Agere T8536 Third-Generation Codec, Dual Battery Operation, ac and dc Parameters,
Fully Programmable
R
S1
FUSIBLE
OR PTC
50
C
VBAT1
0.1
F
V
BAT1
RCVN
RTS
V
PROG
LCTH (THRESHOLD = 11 mA)
V
BAT
C
F2
0.015
μ
F
FB2
VTX
RCVP
VFROP
VFRON
T8536
VFXIN
DX0
DR0
DX1
DR1
FS
BCLK
DGND
V
DD
PCM
HIGHWAY
SYNC
AND
CLOCK
ITR
C
RTS
0.1
μ
F
AGNDV
DD
1 M
50
R
RING
100 V—130 V
SECONDARY
PROTECTOR
FUSIBLE
OR PTC
R
RTF
400
RINGING
SOURCE
C
CC
0.1
μ
F
V
CC
C
DD
0.1
μ
F
V
DD
A
D
C
TX
0.15
μ
F
R
GX
6.34 k
C
C1
RSW
PT
V
/
PWR
T
RING
V
CC
BGND
V
BAT1
RGDET
ICM
DGND
TXI
VITR
180 V—330 V
SECONDARY
PROTECTOR
CF2
FB1
V
BAT2
C
VBAT2
0.1
F
FROM
PROGRAMMABLE
VOLTAGE
SOURCE
LATCH
RESET
SLIC1a
SLIC5a
SLIC0a
NSTAT
B1
B2
SLIC4a
SLIC3a
B0
SLIC2a
CV
DD
0.1
μ
F
V
DD
L9313
(GAIN OF 2)
LCF
PR
0.33
μ
F
V
REF
OVH
CF1
R
20 M