L9216B/H
Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC with Ground Start
ac Applications (continued)
Design Examples (continued)
Example 1, Real Termination (continued)
RX
VGSX
–0.300 V/mA
RT2
VFXIN
–
VITR
VFXIP
+
RT1
RHB1
RCVN
RCVP
–
–
18 Ω
ZT/R
+2.4 V
RP
TIP
AV = 4
AV = 1
RRCV
VFR
+
IT/R
+
+
CURRENT
SENSE
VS
ZT
VT/R
RGP
–
+
RP
AV = –1
RING
18 Ω
–
L9216
1/4 T7504 CODEC
0586 (F)
Figure 21. ac Equivalent Circuit
VBAT1
VBAT2 VCC
CBAT1
CBAT2
CCC
DBAT1
0.1 µF 0.1 µF
0.1 µF
VBAT1
BGND VBAT2 VCC AGND
ICM
RGDET
CRT
ITR
RTFLT
RGX
4750 Ω
0.1 µF
RRT
RX
VTX
383 kΩ
100 kΩ
DCOUT
PR
CTX
GSX
FUSIBLE OR PTC
0.1 µF
30 Ω
TXI
CC1
RT6
49.9 kΩ
AGERE
VBAT1
–
0.1 µF
L7591
DX
VITR
30 Ω
VFXIN
+
RHB1
100 kΩ
PT
RT3
L9216B
PCM
FUSIBLE OR PTC
69.8 kΩ
+2.4 V
HIGHWAY
CC2
0.1 µF
RRCV
60.4 kΩ
VFRO
DR
RCVP
RCVN
VPROG
RGP
FSE
FSEP
MCLK
26.7 kΩ
SYNC
AND
VREF
CLOCK
VREF
rate of battery
reversal not
ramped
RN2
17.65 kΩ
CONTROL
INPUTS
ASEL
CF1
CF1
CF2 FB1 FB2 NSTAT B2 B1 B0
RINGIN
1/4 T7504
CODEC
VREF
C2
0.47 µF
0.22 µF
CF2
0.1 µF
R1
12 kΩ
C1
1.0 µF
Figure 22. Agere T7504 First-Generation Codec Resistive Termination
34
Agere Systems Inc.
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