L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
ac Applications (continued)
Design Examples (continued)
Example 1, Real Termination (continued)
Table 20. L9214 Parts List for Agere T7504 First-Generation Codec; Resistive Termination
Name
Fault Protection
RPT
Value Tolerance
Rating
Function
30 Ω
30 Ω
1%
1%
—
Fusible or PTC Protection resistor.
Fusible or PTC Protection resistor.
RPR
Protector
Agere
L7591
—
Secondary protection.
Power Supply
CVBAT1
0.1 µF
0.1 µF
20%
20%
—
20%
20%
20%
100 V
50 V
—
10 V
100 V
100 V
VBAT filter capacitor.
CVBAT2
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
DBAT1
CCC
1N4004
0.1 µF
0.22 µF
0.1 µF
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%
1%
10 V
Ring trip filter capacitor.
Ring trip filter resistor.
Ring trip filter resistor.
RRT1
RRT2
CFB1
100 kΩ
150 kΩ
0.01 µF
1/16 W
1/16 W
100 V
20%
With CFB2, slows rate of battery reversal. Sets crest factor
of balanced power ring signal.
CFB2
0.01 µF
20%
100 V
With CFB1, slows rate of battery reversal. Sets crest factor
of balanced power ring signal.
ac Interface
RGX
4750 Ω
5 kΩ
1%
5%
1/16 W
1/16 W
10 V
10 V
10 V
Sets T/R to VITR transconductance.
Compensation resistor.
Compensation capacitor.
ac/dc separation.
RCR
CCC1
CTX
150 pF
0.1 µF
0.1 µF
0.1 µF
69.8 kΩ
20%
20%
20%
20%
1%
CC1
dc blocking capacitor.
CC2
10 V
1/16 W
dc blocking capacitor.
With RGP and RRCV, sets termination impedance and
receive gain.
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 offset at RCVN/RCVP.
RGN Optional
Note: TX = 0 dBm, RX = 0 dBm, termination impedance = 600 Ω, hybrid balance = 600 Ω.
Agere Systems Inc.
33
AGERE [ AGERE SYSTEMS ]
