L9216B/H
High-Voltage Ringing SLIC with Ground Start
Preliminary Data Sheet
September 2001
ac Applications
(continued)
Design Examples
(continued)
Example 1, Real Termination
(continued)
R
X
VGSX
–0.300 V/mA
R
T2
VITR
RCVN
RCVP
R
GP
+
A
V
= –1
18
Ω
–
L9216
1/4 T7504 CODEC
0586 (F)
VF
X
IN –
VF
X
IP
+
+2.4 V
V
FR
Z
T/R
R
P
TIP
I
T/R
+
V
T/R
–
R
P
RING
18
Ω
–
A
V
= 1
+
–
A
V
= 4
+
R
T1
R
HB1
R
RCV
V
S
Z
T
CURRENT
SENSE
Figure 21. ac Equivalent Circuit
V
BAT1
C
BAT1
V
BAT2
V
CC
C
BAT2
C
CC
D
BAT1
0.1
µF
0.1
µF
0.1
µF
V
BAT1
BGND V
BAT2
V
CC
AGND
C
RT
0.1
µF
R
RT
383 kΩ
FUSIBLE OR PTC
30
Ω
V
BAT1
AGERE
L7591
ICM
RGDET
ITR
R
GX
4750
Ω
VTX
R
X
C
TX
0.1
µF
TXI
R
T6
49.9 kΩ
VITR
C
C1
0.1 µF
R
HB1
VFXIN
100 kΩ
C
C2
0.1
µF
–
DX
+
+2.4 V
V
FRO
DR
FSE
FSEP
MCLK
SYNC
AND
CLOCK
PCM
HIGHWAY
RTFLT
DCOUT
PR
100 kΩ
GSX
30
Ω
FUSIBLE OR PTC
PT
L9216B
RCVP
R
T3
69.8 kΩ
R
RCV
60.4 kΩ
V
PROG
R
GP
26.7 kΩ
rate of battery
reversal not
ramped
CF2 FB1 FB2 NSTAT B2 B1 B0
RCVN
V
REF
V
REF
R
N2
17.65 kΩ
RING
IN
C
2
0.47
µF
C
1
1.0
µF
R
1
12 kΩ
V
REF
ASEL
CF1
C
F1
0.22
µF
1/4 T7504
CODEC
CONTROL
INPUTS
C
F2
0.1
µF
Figure 22. Agere T7504 First-Generation Codec Resistive Termination
34
Agere Systems Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
