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）
文件頁數(shù)： 12/62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
8
34
RRing1
I
Receive Ring Input - Channel 1:
This input pin along with RTIP1 is used to receive the bipolar line signal from
the Remote DS3/E3 Terminal.
35
AVDD
****
Receive Analog VDD - Channel 1
36
RLB1
I
Remote Loop-back - Channel 1:
This input pin along with LLB1 dictates the Loop-Back mode in which Channel
1 in the XRT7302 is operating.
A "High" on this pin with LLB1 being set to “Low" configures Channel 1 of the
XRT7302 to operate in the Remote Loop-back Mode.
A "High" on this pin with LLB1 also being set to "High" configures Channel 1 of
the XRT7302 to operate in the Digital Local Loop-back Mode.
N
OTE
:
This input pin is ignored and should be connected to GND if the
XRT7302 is operating in the HOST Mode.
37
LLB1
I
Local Loop-back - Channel 1:
This input pin along with RLB1 dictates the Loop-Back mode in which Channel
1 in the XRT7302 is operating.
A "High" on this pin with RLB1 set to "Low" configures Channel 1 of the
XRT7302 to operate in the Analog Local Loop-back Mode.
A "High" on this pin with RLB1 set to "High" configures Channel 1 of the
XRT7302 to operate in the Digital Local Loop-back Mode.
N
OTE
:
This input pin is ignored and should be connected to GND if the
XRT7302 is operating in the HOST Mode.
38
LOSTHR1
I
Loss of Signal Threshold Control - Channel 1:
The voltage forced on this pin controls the input loss of signal threshold for
Channel 1. Forcing the LOSTHR1 pin to GND or VDD provides two settings.
This pin must be set to the desired level upon power up and should not be
changed during operation.
N
OTE
:
This pin is only applicable during DS3 or STS-1 operations.
39
E3_Ch1
I
E3 Select Input - Channel 1:
A "High" on this pin configures Channel 1 of the XRT7302 to operate in the E3
Mode.
A "Low" on this pin configures Channel 1 of the XRT7302 to check the state of
the STS-1/DS3_Ch1 input pin
N
OTE
:
This input pin is ignored and should be connected to GND if the
XRT7302 is operating in the HOST Mode.
40
SR/DR
I
Receive Output Single-Rail/Dual-Rail Select:
Setting this pin "High" configures the Receive Sections of all Channels to out-
put data in a Single-Rail Mode to the Terminal Equipment.
Setting this pin "Low" configures the Receive Section of all Channels to output
data in a Dual-Rail Mode to the Terminal Equipment.
41
STS-1/DS3_Ch1
I
STS-1/DS3 Select Input - Channel 1:
Set this pin to “High” for STS-1 and “Low” for DS3 Operation.
The XRT7302 ignores this pin if the E3_Ch1 pin is set to “1". This input pin is
ignored if the XRT7302 is operating in the HOST Mode. If the XRT7302 is
operating in the HOST Mode, the pin should be tied to GND.
PIN DESCRIPTION
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
相關(guān)PDF資料
PDF描述
XRT73L02M TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02MIV TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L02 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03AIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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