LUCL9219AAR-D AGERE [Agere Systems], LUCL9219AAR-D Datasheet - Page 15

• Manufacturer Part Number: LUCL9219AAR-D
• Description: Low-Cost Line Interface with Reverse Battery and Dual Current Limit
• Manufacturer: AGERE [Agere Systems]

Data Sheet
November 2001
Agere Systems Inc.
Applications
A basic loop start reference circuit, using bused ringing with the L9219 SLIC and the T7504 first-generation codec,
is shown in Figure 11. This circuit is designed for a 200
transhybrid. Transmit gain is set at 0 dBm and receive gain is set at –7 dBm.
Table 9 shows the design parameters of the application circuit shown in Figure 11. Components that are adjusted
to program these values are also shown.
Table 9. 200
Loop Closure Threshold
dc Loop Current Limit
2-wire Signal Overload Level
ac Termination Impedance
Hybrid Balance Line Impedance
Transmit Gain
Receive Gain
RING
TIP
V
402
RING
R
TS1
V
LCAS
BAT
EMR
Design Parameter
0.015 F
35.7 k
2.94 M
3.32 M
22.1 k
R
50
50
R
R
R
R
C
R
PROG
PR
LCTH
PT
TSN
TSP
RTS1
680
Figure 11. Basic Loop Start Application Circuit Using T7504-Type Codec
L7591
18
10
20
19
7
8
0.1 F First-Generation Codec Design Parameters
LCTH
DCOUT
PT
PR
RTSP
RTSN
I
PROG
1
11
CF2
0.47 F
9
V
V
BAT
BAT
C
F1
12
0.1 F
CF1
C
BAT
0.1 F
C
L9219
SLIC
F2
4
V
V
200
200
CC
CC
16
AGND
Parameter Value
0.1 F
C
CC
3.14 dBm
17
BGND
–7 dBm
with Reverse Battery and Dual Current Limit
10 mA
25 mA
0 dBm
680
680
680
NSTAT
RCVN
RCVP
VITR
TSD
VTX
TXI
TG
B2
B1
B0
0.1 F
0.1 F
26
25
24
23
5
6
27
22
13
14
15
0.1 F complex termination impedance and
71.5 k
R
30.1 k
L9219A/G Low-Cost Line Interface
GP
0.1 nF
CONTROL
INPUTS
R
C
SUPERVISION
OUTPUTS
T1
GN
C
0.1 F
R
8.06 k
B
GP1
80.6 k
2.37 k
137 k
R
R
143 k
R
R
T2
N1
GS
RCV
18.2 k
R
R
T1
N2
0.47 F
Components Adjusted
, R
6.8 nF
C
R
357 k
0.47 F
R
C
B1
HB1
GS
C
GP
T2
B2
R
, R
, R
RCV
158 k
VF
X,
RCV,
R
R
R
1/4 T7504
, R
R
–
+
X
R
R
CODEC
PROG
LCTH
—
O
HB1
N1,
+2.4 V
GP
R
GP1,
MCLK
R
, R
FSR
GSX
FSX
N2,
DX
DR
T1
R
C
GS,
HIGHWAY
CONTROL
N
12-3560 (F).g
CLOCK
PCM
AND
C
GS
15