L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
Applications (continued)
Design Examples (continued)
Blocking Capacitors (continued)
Table 25. Parts List L9215; Agere T7504 First-Generation Codec Complex Termination; Meter Pulse
Application
Termination impedance = 220 Ω + (820 Ω || 115 nF), hybrid balance = 220 Ω + (820 Ω || 115 nF) Tx = 0 dBm,
Rx = 0 dBm.
Name
Value Tolerance
Rating
Function
Fault Protection
RPT
RPR
Protector
30 Ω
30 Ω
Agere
L7591
1%
1%
—
Fusible or PTC Protection resistor.
Fusible or PTC Protection resistor.
—
Secondary protection.
Power Supply
CBAT1
CBAT2
DBAT1
CCC
0.1 µF
20%
20%
—
20%
20%
20%
100 V
50 V
—
10 V
100 V
100 V
VBAT filter capacitor.
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
VCC filter capacitor.
Filter capacitor.
Filter capacitor.
0.1 µF
1N4004
0.1 µF
0.22 µF
0.1 µF
CF1
CF2
dc Profile
RVPROG
RVOVH
RVREF
20 kΩ
10 kΩ
80.6 kΩ
1%
1%
1%
1/16 W
1/16 W
1/16 W
With RVREF fixes dc current limit.
With RVREF fixes overhead voltage.
With RVPROG fixes dc current limit/overhead.
Ring/Ring Trip
CRING
CRT
RRT
0.47 µF
0.1 µF
383 kΩ
20%
20%
1%
10 V
10 V
1/16 W
ac-couple input ring signal.
Ring trip filter capacitor.
Ring trip filter resistor.
PPM
CPPM
ac Interface
RGX
RTGS
CGS
CTX
CC1
CC2
RT3
10 nF
20%
10 V
ac-couple PPM input.
4750 Ω
1.74 kΩ
12 nF
0.1 µF
0.1 µF
0.1 µF
49.9 kΩ
1%
1%
5%
20%
20%
20%
1%
1/16 W
1/16 W
10 V
10 V
10 V
Sets T/R to VITR transconductance.
Gain shaping for complex termination.
Gain shaping for complex termination.
ac/dc separation.
dc blocking capacitor.
dc blocking capacitor.
10 V
1/16 W
With RGP and RRCV, sets termination impedance and receive
gain.
RT6
RX
RHB1
RRCV
RGP
40.2 kΩ
115 kΩ
113 kΩ
59.0 kΩ
54.9 kΩ
1%
1%
1%
1%
1%
1/16 W
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.
With RRCV and RT3, sets termination impedance and receive
gain.
CN
RN1
RN2
120 pF
127 kΩ
47.5 kΩ
20%
1%
1%
10 V
1/16 W
1/16 W
High frequency compensation.
High frequency compensation.
High frequency compensation, compensate for dc offset at
RCVP/RCVN.
44
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
