L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
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
Name
Value
Tolerance
Rating
Function
Fault Protection
RPT
30 Ω
30 Ω
Agere L7591
1%
1%
—
Fusible or PTC Protection resistor.
Fusible or PTC Protection resistor.
RPR
Protector
Power Supply
CBAT1
CBAT2
DBAT1
CCC
—
Secondary protection.
0.1 µF
0.1 µF
1N4004
0.1 µF
0.22 µF
0.1 µF
20%
20%
—
20%
20%
20%
100 V
50 V
—
VBAT filter capacitor.
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
10 V
100 V
100 V
VCC filter capacitor.
Filter capacitor.
Filter capacitor.
CF1
CF2
dc Profile
RVPROG
RVREF
Ring/Ring Trip
C1
23.7 kΩ
80.6 kΩ
1%
1%
1/16 W
1/16 W
With RVREF fixes dc current limit.
With RVPROG fixes dc current limit.
1.0 µF
0.47 µF
12 kΩ
0.1 µF
383 kΩ
20%
20%
1%
20%
1%
10 V
10 V
1/16 W
10 V
Ring filter for square wave.
ac-couple input ring signal.
Ring filter for square wave.
Ring trip filter capacitor.
Ring trip filter resistor.
C2
R1
CRT
RRT
1/16 W
ac Interface
RGX
4750 Ω
0.1 µF
0.1 µF
0.1 µF
69.8 kΩ
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 RGP and RRCV, sets termination
impedance and receive gain.
CTX
CC1
CC2
RT3
RT6
49.9 kΩ
100 kΩ
100 kΩ
60.4 kΩ
1%
1%
1%
1%
1/16 W
1/16 W
1/16 W
1/16 W
With RX, sets transmit gain.
With RT6, sets transmit gain.
With RX, sets hybrid balance.
With RGP and RT3, sets termination
impedance and receive gain.
RX
RHB1
RRCV
RGP
26.7 kΩ
17.6 kΩ
1%
1%
1/16 W
1/16 W
With RRCV and RT3, sets termination
impedance and receive gain.
Optional. Compensates for input off-
set at RCVN/RCVP.
RGN Optional
Notes:
Termination impedance = 600 Ω.
Hybrid balance = 600 Ω.
T x = 0 dBm Rx = 0 dBm.
38
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
