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AM7953X-2JC 数据表(PDF) 13 Page - Advanced Micro Devices

部件名 AM7953X-2JC
功能描述  Subscriber Line Interface Circuit
PDF  20 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM7953X-2JC 数据表(HTML) 13 Page - Advanced Micro Devices

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SLIC Products
13
Table 2.
User-Programmable Components
Where ZT is connected between the VTX and RSN pins. The
fuse resistors are RF, and Z2WIN is the desired 2-wire AC input
impedance. When computing ZT, the internal current amplifier
pole and any external stray capacitance between VTX and
RSN must be taken into account.
Where ZRX is connected from VRX to the RSN pin, ZT is
defined above, and G42L is the desired receive gain.
Where RDC1, RDC2, and CDC form the network connected to
the RDC pin. RDC1 and RDC2 are approximately equal.
Where RD and CD form the network connected from RD to –5 V
and IT is the threshold current between on hook and off hook.
Z
T
1000 Z
2W IN
2R
F
–
()
=
Z
RX
Z
L
G
42L
------------
1000
Z
T
•
Z
T
1000 Z
L
2R
F
+
()
+
-----------------------------------------------------
•
=
R
DC 1
R
DC2
+
2500
I
FEED
--------------
=
C
DC
1.5 ms
R
DC 1
R
DC2
+
R
DC 1
R
DC2
•
---------------------------------
•
=
R
D
365
I
T
---------,
=C
D
0.5 ms
R
D
----------------
=



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