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| 型號： | TLIU04C1 |
| 英文描述： | TLIU04C1 Quad T1/E1 Line Interface |
| 中文描述： | TLIU04C1四T1/E1線路接口 |
| 文件頁數(shù)： | 64/100頁 |
| 文件大小： | 1321K |
| 代理商： | TLIU04C1 |
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Advance Data Sheet, Rev. 2
TLIU04C1 Quad T1/E1 Line Interface
April 1999
64
Lucent Technologies Inc.
Direct Logic Control Mode
(continued)
Pin Information
(continued)
Table 39. Pin Descriptions
(continued)
* I = input, O = output, I
u
indicates an input with internal pull-up; I
d
indicates an input with internal pull-down, P = power. Resistance value of all
internal pull-ups or pull-downs is 50 k
, unless otherwise specified.
Pin
Symbol
Type
*
I
d
Qty
Name/Description
124, 33,
52, 105
123, 34,
51, 106
122, 35,
50, 107
46
EQA[1—4]
4
Equalizer Control A.
One of three control pins for selecting
transmit equalizers and DS1/CEPT mode. See Table 45.
Equalizer Control B.
One of three control pins for selecting
transmit equalizers and DS1/CEPT mode. See Table 45.
Equalizer Control C.
One of three control pins for selecting
transmit equalizers and DS1/CEPT mode. See Table 45.
Reference Clock
. A valid reference clock must be provided at this
input. XCLK must be an independent, continuously active, 50%
duty cycle, ungapped, and unjittered clock to guarantee device
performance specifications. XCLK has an internal 100 k
pull-up
resistor. See Table 54.
Transmit AIS.
This pin is set to insert the alarm indication signal
(all ones) on the transmit line interface. This control has priority
over a remote loopback if both are operated simultaneously.
Receive AIS.
This pin selects the shutdown function for the
receiver during analog and digital loss of signal. RCVAIS operates
in conjunction with LOSSD. See Table 42.
Loss of Signal Shutdown Control.
This pin selects the shutdown
function for the receiver during analog and digital loss of signal.
LOSSD operates in conjunction with RCVAIS. See Table 42.
Digital Loss of Signal Standard Selection.
The LOSSTD pin
selects the standard that is followed to deactivate a digital loss of
signal in DS1 mode. For LOSSTD = 0, DLOS is deactivated when
the average ones density is at least 12.5% over 100 contiguous
pulse positions (T1M1.3/93-005, ITU-T G775). For LOSSTD = 1, an
additional constraint of less than 15 consecutive zeros is required
along with the 12.5% ones density (TR-TSY-000009). The LOSSTD
pin has no effect in CEPT mode, which requires 12.5% ones
density over 255 contiguous pulse positions (ITU-T G.775).
Analog Loss of Signal Timer.
This pin selects the time required to
detect an analog loss of signal. For ALTIMER = 0, ALOS is
declared between 1 ms and 2.6 ms after losing signal as required
by I.431(3/93) and ETSI-300-233 (5/94). For ALTIMER = 1, ALOS is
declared between 10 and 255 bit symbol periods after losing signal
as required by G.775 (11/95).
Powerdown Enable.
When this pin is activated (PWRDN = 1), the
circuitry of the channel is put into a standby mode in which minimal
power is consumed.
EQB[1—4]
I
d
4
EQC[1—4]
I
d
4
XCLK
I
u
1
143, 14,
71, 86
XAIS[1—4]
I
d
4
39
RCVAIS
I
d
1
42
LOSSD
I
d
1
41
LOSSTD
I
d
1
40
ALTIMER
I
d
1
121, 36,
49, 108
PWRDN[1—4]
I
d
4
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