L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
ac Applications (continued)
Design Examples (continued)
Third-Generation Codec ac Interface Network—Complex Termination (continued)
Table 22. L9214 Parts List for Agere T8536 Third-Generation Codec Meter Pulse Application ac and dc
Parameters; Fully Programmable
Name
Value
Tolerance
Rating
Function
Fault Protection
RPT
RPR
30 Ω
30 Ω
1%
1%
—
Fusible orPTC Protection resistor*.
Fusible orPTC Protection resistor*.
Protector
Agere L7591
—
Secondary protection.
Power Supply
CVBAT1
CVBAT2
DBAT1
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.
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
CCC
20%
20%
20%
10 V
100 V
100 V
VCC filter capacitor.
Filter capacitor.
CF1
CF2
Filter capacitor.
dc Profile
RIPROG
RIREF
5.76 kΩ
28.7 kΩ
1%
1%
1/16 W
1/16 W
With RIREF, fixes dc current limit.
With RIPROG, fixes dc current limit.
Ringing/Ring Trip
CRT
1.0 µF
20%
1%
10 V
Ring trip filter capacitor.
Ring trip filter resistor.
Ring trip filter resistor.
RRT1
RRT2
CFB1
133 kΩ
75 kΩ
1/16 W
1/16 W
100 V
1%
0.01 µF
20%
With CFB2, slows rate of battery reversal. Sets crest fac-
tor of balanced power ring signal.
CFB2
0.01 µF
20%
100 V
With CFB1, slows rate of battery reversal. Sets crest fac-
tor of balanced power ring signal.
ac Interface
RGX
4750 Ω
10 kΩ
1%
5%
1/16 W
1/16 W
10 V
Sets T/R to VITR transconductance.
Compensation resistor.
Compensation capacitor.
ac/dc separation.
RCR
CCC1
270 pF
0.1 µF
0.1 µF
20%
20%
20%
CTX
10 V
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.
Agere Systems Inc.
41
AGERE [ AGERE SYSTEMS ]
