參數(shù)資料
型號(hào)： 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(yè)數(shù)： 16/62頁(yè)
文件大?。?/td> 715K
代理商： XRT7302
XRT7302
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
á
REV. 1.1.6
12
62
TxClk1
I
Transmit Clock Input for TPData and TNData - Channel 1:
This input pin must be driven at 34.368 MHz for E3 applications, 44.736 MHz
for DS3 applications or 51.84 MHz for SONET STS-1 applications. The
XRT7302 uses this signal to sample the TPData1 and TNData1 input pins. By
default, the XRT7302 is configured to sample these two pins on the falling
edge of this signal.
If operating in the HOST Mode, the XRT7302 can be configured to sample the
TPData1 and TNData1 input pins on either the rising or falling edge of TxClk1.
63
TPData1
I
Transmit Positive Data Input - Channel 1:
The XRT7302 samples this pin on the falling edge of TxClk1. If it samples a
"1", then it generates and transmits a positive polarity pulse to the line.
N
OTES
:
1. The data should be applied to this input pin if the Transmit Section is
configured to accept Single-Rail data from the Terminal Equipment.
2. If operating in the HOST Mode, the XRT7302 can be configured to
sample the TPData1 pin on either the rising or falling edge of TxClk1.
64
TNData1
I
Transmit Negative Data Input - Channel 1:
The XRT7302 samples this pin on the falling edge of TxClk1. If it samples a
"1", then it generates and transmits a negative polarity pulse to the line.
N
OTES
:
1. This input pin is ignored and tied to GND if the Transmit Section is
configured to accept Single-Rail data from the Terminal Equipment.
2. If operating in the HOST Mode, the XRT7302 can be configured to
sample the TNData1 pin on either the rising or falling edge of TxClk1.
65
MTIP1
I
Monitor Tip Input - Channel 1:
The bipolar line output signal from TTIP1 is connected to this pin via a 270-
ohm resistor to check for line driver failure. This pin is internally pulled "High".
66
MRing1
I
Monitor Ring Input - Channel 1:
The bipolar line output signal from TRing1 is connected to this pin via a 270-
ohm resistor to check for line driver failure. This pin is internally pulled "High".
67
AVDD
****
Transmit Analog VDD - Channel 1:
68
TTIP1
O
Transmit TTIP Output - Channel 1:
The XRT7302 uses this pin with TRing1 to transmit a bipolar line signal via a
1:1 transformer.
69
TRing1
O
Transmit Ring Output - Channel 1:
The XRT7302 uses this pin with TTIP1 to transmit a bipolar line signal via a
1:1 transformer.
70
AGND
****
Transmit Analog GND - Channel 1
71
AGND
****
Transmit Analog GND - Channel 0
72
TRing0
O
Transmit Ring Output - Channel 0:
The XRT7302 uses this pin with TTIP0 to transmit a bipolar line signal via a
1:1 transformer.
PIN DESCRIPTION
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
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