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XRT75L04DIV Datasheet(PDF) 8 Page - Exar Corporation

Part # XRT75L04DIV
Description  FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT75L04DIV Datasheet(HTML) 8 Page - Exar Corporation

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XRT75L04D
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FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.1
4
PIN DESCRIPTIONS (BY FUNCTION)
TRANSMIT INTERFACE
PIN #SIGNAL NAME
TYPE
DESCRIPTION
52
49
169
172
TxON_0
TxON_1
TxON_2
TxON_3
I
Transmitter ON Input - Channel 0:
Transmitter ON Input - Channel 1:
Transmitter ON Input - Channel 2:
Transmitter ON Input - Channel 3:
These pins are active only when the corresponding TxON bit is set.
Table below shows the status of the transmitter based on theTxON bit and
TxON pin settings.
NOTES:
1.
These pins will be active and can control the TTIP and TRING outputs
only when the TxON_n bits in the channel register are set .
2.
When Transmitters are turned off the TTIP and TRING outputs are Tri-
stated.
3.
These pins are internally pulled up.
46
34
175
11
TxCLK_0
TxCLK_1
TxCLK_2
TxCLK_3
I
Transmit Clock Input for TPOS and TNEG - Channel 0:
Transmit Clock Input for TPOS and TNEG - Channel 1:
Transmit Clock Input for TPOS and TNEG - Channel 2:
Transmit Clock Input for TPOS and TNEG - Channel 3:
The frequency accuracy of this input clock must be of nominal bit rate ± 20 ppm.
The duty cycle can be 30%-70%.
By default, input data is sampled on the falling edge of TxCLK when input data
is changing on the rising edge of TxCLK..
44
32
1
13
TNEG_0
TNEG_1
TNEG_2
TNEG_3
I
Transmit Negative Data Input - Channel 0:
Transmit Negative Data Input - Channel 1:
Transmit Negative Data Input - Channel 2:
Transmit Negative Data Input - Channel 3:
In Dual-rail mode, these pins are sampled on the falling or rising edge of
TxCLK_n .
NOTES:
1.
These input pins are ignored and must be grounded if the Transmitter
Section is configured to accept Single-Rail data from the Terminal
Equipment.
Bit
0
0
Transm itter Status
OFF
OFF
Pin
0
1
1
1
OFF
ON
0
1
Host/HW
1
1
1
1
x
OFF
0
0
x
ON
1
0


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