L9216B/H
Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC with Ground Start
ac Applications (continued)
Design Examples (continued)
Blocking Capacitors
RTGS
CGS
Rx
RGX = 4750 Ω
–IT/R
CB1
0.1 µF
318.25
RT6
RT3
–
+
20
VTX
TXI
VITR
CODEC
OP AMP
CN
RHB
RN1
RCVN
RCVP
CB2
RRCV
RGP
2.5 V
RN2
CODEC
OUTPUT
DRIVE
AMP
5-6401.M (F)
Figure 24. ac Interface Using First-Generation Codec (Including Blocking Capacitors) for Complex Termi-
nation Impedance
VBAT1
VBAT2 VCC
CBAT1
CBAT2
CCC
DBAT1
VBAT1
0.1 µF 0.1 µF
0.1 µF
BGND VBAT2 VCC
AGND
ICM
RGDET
ground key
not used
CRT
ITR
RTFLT
RTGS 1.74 kΩ
RGX
0.1 µF
4750 Ω
RRT
CGS 12 nF
383 kΩ
VTX
TXI
DCOUT
PR
CTX
0.1 µF
FUSIBLE
OR PTC
RX
113 kΩ
GSX
DX
30 Ω
CC1
RT6
AGERE
L7591
VBAT1
0.1 µF
40.6 kΩ
VITR
–
+
L9216B
CN
120 pF
30 Ω
VFXIN
PT
FUSIBLE
OR PTC
RT3
49.9 kΩ
PCM
HIGHWAY
RHB1
113 kΩ
+2.4 V
RRCV
VFRO
RCVP
RCVN
DR
VPROG
VREF
CF1
59.0 kΩ
CC2
0.1 µF
RN1
127
kΩ
FSE
FSEP
MCLK
SYNC
AND
CLOCK
rate of battery
reversal not
ramped
RGP
54.9 kΩ
VREF
47.5 kΩ
RN2
CF2
FB1 FB2
NSTAT B2 B1 B0
FROM/TO CONTROL
RINGIN
CONTROL
INPUTS
ASEL
CF1
VREF
CRING
0.47 µF
1/4 T7504
CODEC
0.22 µF
CF2
0.1 µF
RING
Figure 25. Agere T7504 First-Generation Codec Complex Termination
Agere Systems Inc.
39
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