Data Sheet
September 2001
Short-Loop Sine Wave Ringing SLIC
L9215A/G
38
Agere Systems Inc.
ac Applications
(continued)
Design Examples
(continued)
Example 1, Real Termination
(continued)
Table 24. Parts List L9215; Agere T7504 First-Generation Codec Resistive Termination; Nonmeter Pulse
Application
Notes:
Termination impedance = 600
.
Hybrid balance = 600
.
T x = 0 dBm Rx = 0 dBm.
Name
Value
Tolerance
Rating
Function
Fault Protection
R
PT
R
PR
Protector
Power Supply
C
BAT1
C
BAT2
D
BAT1
C
CC
C
F1
C
F2
dc Profile
R
VPROG
R
VREF
Ring/Ring Trip
C
1
C
2
R
1
C
RT
R
RT
ac Interface
R
GX
C
TX
C
C1
C
C2
R
T3
30
30
1%
1%
—
Fusible or PTC Protection resistor.
Fusible or PTC Protection resistor.
—
Secondary protection.
Agere L7591
0.1
μ
F
0.1
μ
F
1N4004
0.1
μ
F
0.22
μ
F
0.1
μ
F
20%
20%
—
20%
20%
20%
100 V
50 V
—
10 V
100 V
100 V
V
BAT
filter capacitor.
V
BAT
filter capacitor. |V
BAT2
| < |V
BAT1
|.
Reverse current.
V
CC
filter capacitor.
Filter capacitor.
Filter capacitor.
23.7 k
80.6 k
1%
1%
1/16 W
1/16 W
With R
VREF
fixes dc current limit.
With R
VPROG
fixes dc current limit.
1.0
μ
F
0.47
μ
F
12 k
0.1
μ
F
383 k
20%
20%
1%
20%
1%
10 V
10 V
1/16 W
10 V
1/16 W
Ring filter for square wave.
ac-couple input ring signal.
Ring filter for square wave.
Ring trip filter capacitor.
Ring trip filter resistor.
4750
0.1
μ
F
0.1
μ
F
0.1
μ
F
69.8 k
1%
20%
20%
20%
1%
1/16 W
10 V
10 V
10 V
1/16 W
Sets T/R to VITR transconductance.
ac/dc separation.
dc blocking capacitor.
dc blocking capacitor.
With R
GP
and R
RCV
, sets termination
impedance and receive gain.
With R
X
, sets transmit gain.
With R
T6
, sets transmit gain.
With R
X
, sets hybrid balance.
With R
GP
and R
T3
, sets termination
impedance and receive gain.
With R
RCV
and R
T3
, sets termination
impedance and receive gain.
Optional. Compensates for input off-
set at RCVN/RCVP.
R
T6
R
X
R
HB1
R
RCV
49.9 k
100 k
100 k
60.4 k
1%
1%
1%
1%
1/16 W
1/16 W
1/16 W
1/16 W
R
GP
26.7 k
1%
1/16 W
R
GN
Optional
17.6 k
1%
1/16 W