L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
ac Applications (continued)
Design Examples (continued)
Third-Generation Codec ac Interface Network—Complex Termination (continued)
Table 26. Parts List L9215; Agere T8536 Third-Generation Codec Meter Pulse Application ac and dc
Parameters; Fully Programmable
Name
Value
Tolerance
Rating
Function
Fault Protection
RPT
RPR
50 Ω
50 Ω
1%
1%
—
FusibleorPTC Protection resistor*.
FusibleorPTC Protection resistor*.
Protector
Agere L7591
—
Secondary protection.
Power Supply
CBAT1
0.1 µF
0.1 µF
1N4004
0.1 µF
0.22 µF
0.1 µF
20%
20%
—
100 V
50 V
—
VBAT filter capacitor.
CBAT2
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
DBAT1
CCC
20%
20%
20%
10 V
100 V
100 V
VCC filter capacitor.
Filter capacitor.
CF1
CF2
Filter capacitor.
Ring/Ring Trip
CRING
CRT
0.47 µF
0.1 µF
20%
20%
1%
10 V
10 V
ac-couple input ring signal.
Ring trip filter capacitor.
Ring trip filter resistor.
RRT
383 kΩ
1/16 W
PPM
CPPM
10 nF
20%
10 V
ac-couple PPM input.
ac Interface
RGX
4750 Ω
20 MΩ
0.1 µF
0.1 µF
1%
5%
1/16 W
1/16 W
10 V
Sets T/R to VITR transconductance.
dc Bias
RCIN
CTX
20%
20%
ac/dc separation.
CC1
10 V
dc blocking capacitor.
* For loop stability, increase to 50 Ω minimum if synthesizing 900 Ω or 900 Ω + 2.16 µF termination impedance.
46
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
