參數(shù)資料
型號(hào)： AM79R79
廠商： Advanced Micro Devices, Inc.
英文描述： Ringing Subscriber Line Interface Circuit
中文描述： 振鈴用戶(hù)線(xiàn)接口電路
文件頁(yè)數(shù)： 12/20頁(yè)
文件大?。?/td> 361K
代理商： AM79R79
12
Am79R79 Data Sheet
DC FEED CHARACTERISTICS
50
5) V
APPH
I
L
(mA)
0
30
V
AB
(Volts)
2) V
ASL
3) V
APPL
40
30
20
10
4) V
ASH
Figure 1. Typical V
AB
vs. I
L
DC Feed Characteristics
80 k
100 k
=
+
Notes:
1. Constant-current region:
where
2. Low battery
where R
SGL
= resistor to GND, B2EN = logic Low.
Anti-sat region:
where R
SGL
= resistor to V
CC
, B2EN = logic Low.
R
SGL
to V
CC
must be greater than 100 k
.
3.
4. High battery
Anti-sat region:
where R
SGH
= resistor to GND, B2EN = logic High.
where R
SGH
= resistor to V
CC
, B2EN = logic High.
R
SGH
to V
CC
must be greater than 100 k
.
5.
R
DC
R
DC1
R
DC2
20 k
=
+
=
V
BAT1
75 V V
BAT2
,
24 V
–
=
–
=
(
)
V
AB
I
L
R
L
2500
L
;
RDC
=
=
R
L
R
L
=
2R
F
,
+
V
ASL
1000
----------------------------------------------------------------- ;
104
10
3
R
+
(
)
6720
10
3
80
R
SGL
(
)
+
=
V
ASL
1000
-------------------------------------------------------------- ;
R
56
10
3
–
(
)
6720
10
3
80
R
SGL
(
)
+
=
V
APPL
4.17
V
ASL
+
=
I
LOOPL
V
)
R
--------------------------------------
R
+
(
600
2R
F
R
LOOP
+
+
------------------------------------------------------------------------------
=
V
ASH
V
ASHH
V
ASL
+
=
V
ASHH
1000
---------------------------------------------------------------------- ;
70
10
3
R
+
(
)
1934
10
3
31.75
R
SGH
(
)
+
=
V
ASHH
1000
---------------------------------------------------------------------- ;
R
2.75
10
3
+
(
)
1934
10
3
31.75
R
SGH
(
)
+
=
V
APPH
4.17
V
ASH
+
=
I
LOOPH
V
)
R
--------------------------------------
R
+
(
600
2R
F
R
LOOP
+
+
------------------------------------------------------------------------------
=
High Battery Anti-Sat
Low Battery Anti-Sat
1) Constant-Current Region
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