參數(shù)資料
型號： L9215A
英文描述： CAP CER 2200PF 3.15KVDC R3 RAD
中文描述： 短回路正弦波振鈴用戶接口
文件頁數(shù)： 45/50頁
文件大?。?/td> 1115K
代理商： L9215A
Data Sheet
September 2001
Short-Loop Sine Wave Ringing SLIC
L9215A/G
Agere Systems Inc.
45
ac Applications
(continued)
Design Examples
(continued)
Third-Generation Codec ac Interface Network—Complex Termination
The following reference circuit shows the complete SLIC schematic for interface to the Agere T8536 third-genera-
tion codec. All ac parameters are programmed by the T8536. Note this codec differentiates itself in that no external
components are required in the ac interface to provide a dc termination impedance or for stability. For illustration
purposes, 0.5 Vrms PPM injection was assumed in this example and no meter pulse rejection is used. Also, this
example illustrates the device using programmable overhead and current limit. Please see the T8535/6 data sheet
for information on coefficient programming.
Figure 27. Third-Generation Codec ac Interface Network; Complex Termination
V
BAT1
BGND
V
BAT2
V
CC
AGND
C
BAT1
0.1
μ
F
C
BAT2
0.1
μ
F
C
CC
0.1
μ
F
RTFLT
DCOUT
PR
PT
OVH
V
PROG
V
REF
C
RT
0.1
μ
F
R
RT
383
k
AGERE
L7591
50
V
BAT2
FUSIBLE OR PTC
50
CF1
CF2
NSTAT BR B2 B1 B0
C
F1
0.22
μ
F
C
F2
0.1
μ
F
PPM
0.5 Vrms
C
10 nF
RING
IN
PPM
IN
VITR
RCVP
RCVN
ITR
VTX
TXI
R
4750
V
BAT1
D
BAT1
V
BAT2
V
CC
C
TX
0.1
μ
F
C
0.47
μ
F
CONTROL
VOLTAGE
C
C1
0.1
μ
F
PCM
HIGHWAY
DX0
DR0
DX1
DR1
FS
BCLK
DGND
V
DD
SYNC
AND
CLOCK
V
DD
VFXI
VFROP
VFRON
SLIC4a
SLIC3a
SLIC2a
SLIC1a
SLIC0a
L9215G
FROM/TO T8536
CONTROL LATCHES
B2
B1
BR
NSTAT
B0
FUSIBLE OR PTC
1/4
R
CIN
20
M
T8536/8
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