參數(shù)資料
型號: XRT75L03DIV-F
廠商: Exar Corporation
文件頁數(shù): 116/134頁
文件大小: 0K
描述: IC LIU E3/DS3/STS-1 3CH 128LQFP
標(biāo)準(zhǔn)包裝: 72
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 3/3
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 128-LQFP(14x20)
包裝: 托盤
XRT75L03D
á
REV. 1.0.0
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
77
1
TxCLKINV
R/W
0
Transmit Clock Invert Select - Channel_n:
This READ/WRITE bit-field is used to select the edge of
the TxCLK_n input that the Transmit Section of Channel_n
will use to sample the TPDATA_n and TNDATA_n input
pins, as described below.
0 - Configures the Transmit Section (within the correspond-
ing channel) to sample the TPDATA_n and TNDATA_n
input pins upon the falling edge of TxCLK_n.
1 - Configures the Transmit Section (within the correspond-
ing channel) to sample the TPDATA_n and TNDATA_n
input pins upon the rising edge of TxCLK_n.
NOTE:
Whenever
this
configuration
setting
is
accomplished via the Host Mode, it is done on a
per-channel basis.
0TxLEV
R/W
0
Transmit Line Build-Out Select - Channel_n:
This READ/WRITE bit-field is used to either enable or dis-
able the Transmit Line Build-Out (e.g., pulse-shaping) cir-
cuit within the corresponding channel. The user should set
this bit-field to either "0" or to "1" based upon the following
guidelines.
0 - If the cable length between the Transmit Output (of the
corresponding Channel) and the DSX-3/STSX-1 location is
225 feet or less.
1 - If the cable length between the Transmit Output (of the
corresponding Channel) and the DSX-3/STSX-1 location is
225 feet or more.
The user must follow these guidelines in order to insure
that the Transmit Section (of Channel_n) will always gener-
ate a DS3 pulse that complies with the Isolated Pulse Tem-
plate requirements per Bellcore GR-499-CORE, or an
STS-1 pulse that complies with the Pulse Template
requirements per Telcordia GR-253-CORE.
NOTE:
This bit-field is ignored if the channel has been
configured to operate in the E3 Mode.
BIT NUMBER
NAME
TYPE
DEFAULT
VALUE
DESCRIPTION
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