L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
Applications (continued)
Design Examples (continued)
ac Interface Using First-Generation Codec (continued)
Table 21. L9214 Parts List for Agere T7504 First-Generation Codec; Complex Termination with Power Con-
trol Resistor (continued)
Name
Value Tolerance
Rating
Function
Power Supply
CVBAT1
CVBAT2
DBAT1
CCC
0.1 µF
20%
20%
—
100 V
50 V
—
VBAT filter capacitor.
0.1 µF
1N4004
0.1 µF
0.22 µF
0.1 µF
2.0 kΩ
VBAT filter capacitor. |VBAT2| < |VBAT1|.
Reverse current.
20%
20%
20%
5%
10 V
100 V
100 V
2 W
VCC filter capacitor.
CF1
Filter capacitor.
CF2
Filter capacitor.
RPWR
dc Profile
RIPROG
RIREF
Power control resistor, provides single battery supply operation.
5.76 kΩ
28.7 kΩ
1%
1%
1/16 W With RIREF, fixes dc current limit.
1/16 W With RIPROG, fixes dc current limit.
Ringing/Ring Trip
CRING
RRT1
RRT2
CFB1
1.0 µF
133 kΩ
75 kΩ
20%
1%
10 V
Ring trip filter capacitor.
1/16 W Ring trip filter resistor.
1/16 W Ring trip filter resistor.
1%
0.01 µF
20%
100 V
With CFB2, slows rate of battery reversal. Sets crest factor of bal-
anced power ring signal.
CFB2
0.01 µF
20%
100 V
With CFB1, slows rate of battery reversal. Sets crest factor of bal-
anced power ring signal.
ac Interface
RGX
4750 Ω
1.74 kΩ
12 nF
1%
1%
1/16 W Sets T/R to VITR transconductance.
1/16 W Gain shaping for complex termination.
RTGS
CGS
5%
10 V
10 V
10 V
10 V
Gain shaping for complex termination.
ac/dc separation.
CTX
0.1 µF
20%
20%
20%
1%
CC1
0.1 µF
dc blocking capacitor.
CC2
0.1 µF
dc blocking capacitor.
RT3
49.9 kΩ
40.2 kΩ
115 kΩ
113 kΩ
59.0 kΩ
54.9 kΩ
120 pF
127 kΩ
47.5 kΩ
1/16 W With RGP and RRCV, sets termination impedance and receive gain.
1/16 W With RX, sets transmit gain.
RT6
1%
RX
1%
1/16 W With RT6, sets transmit gain.
RHB1
RRCV
RGP
1%
1/16 W With RX, sets hybrid balance.
1%
1/16 W With RGP and RT3, sets termination impedance and receive gain.
1/16 W With RRCV and RT3, sets termination impedance and receive gain.
1%
CN
20%
1%
10 V
High frequency compensation.
RN1
1/16 W High frequency compensation.
RN2
1%
1/16 W High frequency compensation, compensate for dc offset at
RCVP/RCVN.
Note: TX = 0 dBm, RX = 0 dBm, termination impedance = 220 Ω + (820 Ω || 115 nF), hybrid balance = 220 Ω + (820 Ω || 115 nF).
Agere Systems Inc.
39
AGERE [ AGERE SYSTEMS ]
