參數(shù)資料
型號: L7554
英文描述: L7554 Low-Power SLIC
中文描述: L7554低功耗用戶接口
文件頁數(shù): 14/28頁
文件大?。?/td> 486K
代理商: L7554
14
Lucent Technologies Inc.
Data Sheet
March 1997
L7554 Low-Power SLIC
Applications
12-2573 (C)
Figure 11. Basic Loop Start Application Circuit Using T7513 Type Codec
12-2821 (C)
Figure 12. Ground Start Application Circuit
R
PROG
66.8 k
R
LCTH
24.9 k
TIP R
PT
20
RING
250 V PROT
R
PR
L7581
RELAY
PT
30
0.1 μF
C
CC
14DI
12LCTH
3
V
CC
8
V
CC
20
PR
16
RTSP
32
R
TS1
402
C
0.27 μF
RTSN
31
R
274 k
R
2.0 M
V
RING
V
BAT
CF2
18
CF1
19
C
F1
0.47 μF
AGND
24
AGND
25
BGND
27
PROG
V
BAT
15
C
BAT
0.1 μF
VITR
RCVP
RCVN
20
9
10
R
20.0 k
R
T1
86.6 k
R
T2
18.7 k
R
RCV
48.7 k
R
HB1
28.0 k
VFXIN
VFXIP
R
X
28.0 k
GSX
PWROP
PWRON
GSR
DX
DR
FSX
FSR
MC
PD
CLKSEL
A/μ
T7513
CODEC
CONTROL
INPUTS
PCM
HIGHWAY
SYNCH
AND
CLOCK
+
L7554
SLIC
B1
B0
36
23
CONTROL
INPUTS
NLC
NRDET
34
33
SUPERVISION
OUTPUTS
C
RTS1
0.022 μF
TXI
V
TX
CB2
0.1 μF
29
11
B2 35
R
TSP
2.0 M
C
330 pF
C
0.1 μF
V
BAT
V
REG
V
CC
RGDET
100 k
RGDET
ICM
0.47 μF
CICM
LOOP START
APPLICATION CIRCUIT
22
21
82.5 k
RICM2
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