參數(shù)資料
型號: XRT7302
廠商: Exar Corporation
英文描述: 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
中文描述: 2頻道E3/DS3/STS-1線路接口單元(2通道E3/DS3/STS-1線接口單元)
文件頁數(shù): 2/62頁
文件大?。?/td> 715K
代理商: XRT7302
XRT7302
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
á
REV. 1.1.6
2
TRANSMIT INTERFACE CHARACTERISTICS
Accepts either Single-Rail or Dual-Rail data from
Terminal Equipment and generates a bipolar signal
Integrated Pulse Shaping Circuit
Built-in B3ZS/HDB3 Encoder (which can be dis-
abled)
Contains Transmit Clock Duty Cycle Correction Cir-
cuit on-chip
Generates pulses that comply with the ITU-T G.703
pulse template (E3 applications)
Generates pulses that comply with the DSX-3 pulse
template, as specified in Bellcore GR-499
-CORE
and ANSI T1.102_1993
Generates pulses that comply with the STSX-1
pulse template, as specified in Bellcore GR-253-
CORE
Transmitter can be turned off in order to support
redundancy designs
RECEIVE INTERFACE CHARACTERISTICS
Integrated Adaptive Receive Equalization
(Optional) and Timing Recovery
Declares and Clears the LOS alarm per ITU-T
G.775 requirements for E3 and DS3 applications
Meets Jitter Tolerance Requirements, as specified
in ITU-T G.823_1993 for E3 Applications
Meets Jitter Tolerance Requirements, as specified
in Bellcore GR-499-CORE for DS3 Applications
Declares Loss of Signal (LOS) and Loss of Lock
(LOL) Alarms
Built-in B3ZS/HDB3 Decoder (which can be dis-
abled)
Recovered Data can be automatically muted while
the LOS Condition is declared
Outputs either Single-Rail or Dual-Rail data to the
Terminal Equipment
Receiver can be powered down in order to con-
serve power in redundancy designs
PIN OUT OF THE XRT7302
TxLEV0
TAOS0
DVDD
DMO0
DGND
AGND
DVDD
Host/(HW)
RxClk0
RNEG0
RPOS0
DGND
RLOS0
LCV0
RLOL0
EXClk0
CS/(ENDECDIS)
SClk/(RxOff1)
SDI/(RxOff0)
SDO/(E3_Ch0)
S
I
L
L
R
A
R
R
A
R
R
A
R
R
A
R
L
L
E
S
TxLEV1
TAOS1
DVDD
DMO1
DGND
AGND
DVDD
LOSMUTEN
RxClk1
RNEG1
RPOS1
DGND
RLOS1
LCV1
RLOL1
EXClk1
VDD
GND
REGR/(RxClkINV)
STS-1/DS3_Ch1
80 Lead TQFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
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53
52
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48
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46
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41
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
4
8
7
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7
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7
6
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6
6
6
6
6
6
6
T
T
T
T
M
M
A
T
T
A
A
T
T
A
M
M
T
T
T
T
相關(guān)PDF資料
PDF描述
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