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參數(shù)資料
| 型號： | AM79514 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Subscriber Line Interface Circuit |
| 中文描述： | 用戶線接口電路 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 786K |
| 代理商： | AM79514 |
SLIC Products
11
Table 1.
SLIC Decoding
DET Output
State
0
1
2
3
4
5
6
7
C3 C2 C1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Two-Wire Status
Open Circuit
Ringing
Active
On-hook TX (OHT)
Tip Open
Reserved
Active Polarity Reversal
OHT Polarity Reversal
E1 = 0
E1 = 1
Ring trip
Ring trip
Loop detector
Loop detector
Loop detector
Loop detector
Loop detector
Loop detector
Ring trip
Ring trip
Ground key
Ground key
—
—
Ground key
Ground key
Table 2.
User-Programmable Components
Where Z
T
is connected between the VTX and RSN pins. The
fuse resistors are R
F
, and Z
2WIN
is the desired 2-wire AC input
impedance. When computing Z
T
, the internal current amplifier
pole and any external stray capacitance between VTX and
RSN must be taken into account.
Where Z
RX
is connected from V
RX
to the RSN pin, Z
T
is defined
above, G
42L
is the desired receive gain, and Z
L
is the 2-wire
load impedance.
Where R
DC1
, R
DC2
, and C
DC
form the network
C
DC
= (1.5 ms)(R
DC1
+ R
DC2
)/(R
DC1
R
DC2
) connected to the
RDC pin. R
DC1
and R
DC2
are approximately equal.
Where R
D
and C
D
form the network connected from RD to
–
5 V
and I
T
is the threshold current between on hook and off hook.
Z
T
1000 Z
2WIN
2R
F
–
)
=
Z
RX
Z
G
42L
-----------
1000
1000 Z
L
Z
T
F
+
)
+
----------------------------------------------------
=
R
DC1
R
DC2
I
FEED
-------------
=
+
R
D
I
T
--------
C
D
R
D
----------------
=
,
=
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| AM79514-1JC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Subscriber Line Interface Circuit |
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