參數(shù)資料
型號： XRT75L04IVTR-F
廠商： Exar Corporation
文件頁數(shù)： 55/57頁
文件大小： 0K
描述： IC LIU E3/DS3/STS-1 4CH 176LQFP
標(biāo)準(zhǔn)包裝： 1,000
類型： 線路接口裝置（LIU）
驅(qū)動器/接收器數(shù)： 4/4
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： 176-LQFP
供應(yīng)商設(shè)備封裝： 176-TQFP（24x24）
包裝： 帶卷 (TR)
XRT75L04
5
REV. 1.0.4
FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
45
33
176
12
TPOS_0
TPOS_1
TPOS_2
TPOS_3
I
Transmit Positive Data Input - Channel 0:
Transmit Positive Data Input - Channel 1:
Transmit Positive Data Input - Channel 2:
Transmit Positive Data Input - Channel 3:
By default sampled on the falling edge of TxCLK
41
29
4
16
TTIP_0
TTIP_1
TTIP_2
TTIP_3
O
Transmit TTIP Output - Channel 0:
Transmit TTIP Output - Channel 1:
Transmit TTIP Output - Channel 2:
Transmit TTIP Output - Channel 3:
These pins along with TRING transmit bipolar signals to the line using a 1:1
transformer.
39
27
6
18
TRING_0
TRING_1
TRING_2
TRING_3
O
Transmit Ring Output - Channel 0:
Transmit Ring Output - Channel 1:
Transmit Ring Output - Channel 2:
Transmit Ring Output - Channel 3:
These pins along with TTIP transmit bipolar signals to the line using a 1:1 trans-
former.
50
47
171
174
TxLEV_0
TxLEV_1
TxLEV_2
TxLEV_3
I
Transmit Line Build-Out Enable/Disable Select - Channel 0:
Transmit Line Build-Out Enable/Disable Select - Channel 1:
Transmit Line Build-Out Enable/Disable Select - Channel 2:
Transmit Line Build-Out Enable/Disable Select - Channel 3:
These input pins are used to select the Transmit Line Build-Out circuit of Chan-
nel n.
Setting these pins to "High" disables the Line Build-Out circuit of Channel n. In
this mode, Channel n outputs partially-shaped pulses onto the line via the
TTIP_n and TRing_n output pins.
Setting these pins to "Low" enables the Line Build-Out circuit of Channel n. In
this mode, Channel n outputs shaped pulses onto the line via the TTIP_n and
TRing_n output pins.
To comply with the Isolated DSX-3/STSX-1 Pulse Template Requirements per
Bellcore GR-499-CORE or Bellcore GR-253-CORE:
1. Set these pins to "1" if the cable length between the Cross-Connect and the
transmit output of Channel is greater than 225 feet.
2. Set these pins to "0" if the cable length between the Cross-Connect and the
transmit output of Channel is less than 225 feet.
These pins are active only if the following two conditions are true:
a. The XRT75L04 is configured to operate in either the DS3 or SONET STS-1
Modes.
b. The XRT75L04 is configured to operate in the Hardware Mode.
NOTES:
1.
These pins are internally pulled down.
2.
If the XRT75L04 is configured in HOST mode, these pins should be
tied to GND.
TRANSMIT INTERFACE
PIN #SIGNAL NAME
TYPE
DESCRIPTION
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