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參數(shù)資料
| 型號： | XRT81L27 |
| 廠商： | Exar Corporation |
| 英文描述： | Seven Channel E1 Line Interface Unit with Clock Recovery(7通道 E1線接口單元（帶時鐘恢復(fù)）) |
| 中文描述： | 七通道E1線路接口單元的時鐘恢復(fù)（7通道素E1線接口單元（帶時鐘恢復(fù)）） |
| 文件頁數(shù)： | 4/28頁 |
| 文件大?。?/td> | 140K |
| 代理商： | XRT81L27 |
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XRT81L27
SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
REV. P1.0.1
PRELIMINARY
4
PIN DESCRIPTIONS
P
IN
#
N
AME
T
YPE
D
ESCRIPTION
1
RClk1
O
Receiver 1 Clock Output
2
LOS1
O
Receiver 1 Loss of Signal:
This signal is asserted High to indicate loss of signal at the receive input.
3
RST/LBEN
I
Reset(Active-low):
In Host Mode, tie this pin “Low” to reset the serial register contents to zero.
Loop-back Enable(Active-low):
In Hardware Mode, when this pin is tied “Low”, Loop-back mode is enabled.
N
OTE
:
See description of pin 47 to pin 50 for Local or Remote Loop-back
selection.
Internally pulled-high with 50K
.
4
RTIP1
I
Receiver 1 Bipolar Positive Input:
5
RRing1
I
Receiver 1 Bipolar Negative Input:
6
PDTx1
I
Powered-down Transmitter 1:
This pin is operational for both Host or Hardware mode, tie this pin High to
power-down channel 1 transmitter and set TTIP1 and TRing1 output to high
impedance. Internally pulled-high with 50K
.
7
TTIP1
O
Transmitter 1 Tip Output:
Positive bipolar data output to the line
8
TVDD1
****
Transmitter 1 Positive Supply (3.3V± 5%)
9
TRing1
O
Transmitter 1 Ring Output:
Negative bipolar data output to the line.
10
TGND1
****
Transmitter 1 Supply Ground
11
PDTx3
I
Powered-down Transmitter 3:
This pin is operational for both Host or Hardware mode, tie this pin High to
power-down channel 3 transmitter and set TTIP3 and TRing3 output to high
impedance. Internally pulled- high with 50K
.
12
TTIP3
O
Transmitter 3 Tip Output:
Positive bipolar data output to the line.
13
TVDD3
****
Transmitter 3 Positive Supply(3.3V± 5%)
14
TRing3
O
Transmitter 3 Ring Output:
Negative bipolar data output to the line.
15
TGND
****
Transmitter 3 Supply Ground.
16
AVDD
****
Analog Positive Supply(3.3V± 5%)
17
RTIP3
I
Receiver 3 Bipolar Positive Input:
18
RRing3
I
Receiver 3 Bipolar Negative Input:
19
AGND
****
Analog Supply Ground.
20
RTIP5
I
Receiver 5 Bipolar Positive Input:
21
RRing5
I
Receiver 5 Bipolar Negative Input:
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相關(guān)代理商/技術(shù)參數(shù) |
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